/* ==========================================================================
   Bridge — base styles
   ========================================================================== */

@font-face {
  font-family: "Bricolage Grotesque";
  src: url("/assets/fonts/bricolage-grotesque.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #ffffff;
  --mist: #f3f4f7;
  --ink: #16181d;
  --slate: #5a606c;
  --line: #e3e5ea;
  --accent: #3b3be6;
  --accent-ink: #2a2ab8;
  --accent-soft: #ececfd;
  --success: #138a55;
  --success-soft: #e5f5ec;
  --danger: #c2372e;
  --danger-soft: #fbeceb;

  --font-display: "Bricolage Grotesque", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;

  --shadow-soft: 0 1px 2px rgba(22, 24, 29, 0.04), 0 8px 28px rgba(22, 24, 29, 0.06);
  --shadow-lift: 0 2px 6px rgba(59, 59, 230, 0.18), 0 12px 32px rgba(59, 59, 230, 0.18);

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 72px; --space-9: 112px;

  --content: 1120px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #121419;
    --mist: #1b1e25;
    --ink: #f1f2f5;
    --slate: #a2a8b4;
    --line: #2b2f38;
    --accent: #8b8bff;
    --accent-ink: #b0b0ff;
    --accent-soft: #23244a;
    --success: #4cc98a;
    --success-soft: #16301f;
    --danger: #ff7a70;
    --danger-soft: #3a1c1a;
    --shadow-soft: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 28px rgba(0, 0, 0, 0.35);
    --shadow-lift: 0 8px 28px rgba(0, 0, 0, 0.4);
  }
}
:root[data-theme="dark"] {
  --paper: #121419;
  --mist: #1b1e25;
  --ink: #f1f2f5;
  --slate: #a2a8b4;
  --line: #2b2f38;
  --accent: #8b8bff;
  --accent-ink: #b0b0ff;
  --accent-soft: #23244a;
  --success: #4cc98a;
  --success-soft: #16301f;
  --danger: #ff7a70;
  --danger-soft: #3a1c1a;
  --shadow-soft: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 28px rgba(0, 0, 0, 0.35);
  --shadow-lift: 0 8px 28px rgba(0, 0, 0, 0.4);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { flex: 1; outline: none; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 650;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; }
a { color: var(--accent-ink); }
img, video, svg { max-width: 100%; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; inset-inline-start: 12px; top: -60px; z-index: 100;
  padding: 10px 16px; border-radius: var(--radius-sm);
  background: var(--ink); color: var(--paper); text-decoration: none;
}
.skip-link:focus { top: 12px; }

.muted { color: var(--slate); }
.small { font-size: 0.875rem; }

/* ---------- Buttons ---------- */

.btn {
  --btn-h: 48px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: var(--btn-h);
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font: 600 1rem/1 var(--font-body);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease), transform 0.15s var(--ease), box-shadow 0.15s var(--ease);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-ink); box-shadow: var(--shadow-lift); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn-primary { color: #0f1030; }
  :root:not([data-theme="light"]) .btn-primary:hover { background: var(--accent-ink); }
}
:root[data-theme="dark"] .btn-primary { color: #0f1030; }
:root[data-theme="dark"] .btn-primary:hover { background: var(--accent-ink); }

.btn-secondary { background: var(--paper); color: var(--ink); border-color: var(--line); }
.btn-secondary:hover { border-color: var(--slate); }

.btn-ghost { background: transparent; color: var(--slate); }
.btn-ghost:hover { color: var(--ink); background: var(--mist); }

.btn-sm { --btn-h: 40px; padding: 0 16px; font-size: 0.9375rem; }
.btn-lg { --btn-h: 56px; padding: 0 30px; font-size: 1.0625rem; }
.btn-block { width: 100%; }

.button-row { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }

.text-link { font-weight: 600; text-underline-offset: 3px; }

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.site-header.scrolled { border-bottom-color: var(--line); }

.header-inner {
  max-width: var(--content); margin: 0 auto;
  display: flex; align-items: center; gap: var(--space-5);
  padding: 14px var(--space-5);
  padding-top: max(14px, env(safe-area-inset-top));
}

.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink); text-decoration: none;
  font: 700 1.3rem/1 var(--font-display); letter-spacing: -0.015em;
}
.brand-mark { width: 30px; height: 30px; fill: var(--accent); stroke: var(--accent); }

.site-nav { display: flex; gap: var(--space-5); margin-inline-start: auto; }
.site-nav a { color: var(--slate); text-decoration: none; font-weight: 500; font-size: 0.9375rem; }
.site-nav a:hover { color: var(--ink); }

/* ---------- Hero ---------- */

.hero {
  max-width: var(--content); margin: 0 auto;
  padding: var(--space-8) var(--space-5) var(--space-9);
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-7); align-items: center;
}

.hero h1 {
  font-size: clamp(2.6rem, 6.2vw, 5.1rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 0.98;
  font-variation-settings: "opsz" 96;
  max-width: 12ch;
}

.hero-sub {
  margin-top: var(--space-5);
  font-size: clamp(1.15rem, 1.9vw, 1.4rem);
  color: var(--slate);
  max-width: 34ch;
}

.hero-cta { margin-top: var(--space-6); display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4) var(--space-5); }
.hero-note { color: var(--slate); font-size: 0.9375rem; }
.hero-kinds { margin-top: var(--space-7); color: var(--slate); font-weight: 500; letter-spacing: 0.01em; }

.bridge-art { width: 100%; height: auto; overflow: visible; }
.device-body { fill: var(--mist); stroke: var(--line); stroke-width: 2; }
.device-screen { fill: var(--paper); stroke: var(--line); stroke-width: 1.5; }
.device-detail { fill: var(--line); }
.arc { stroke: var(--accent); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 520; stroke-dashoffset: 520; animation: draw-arc 0.9s var(--ease) 0.1s forwards; }
.arc-end { fill: var(--accent); }
.chip-body { fill: var(--accent); }
.chip-icon { fill: #fff; opacity: 0.95; }
.arrived { opacity: 0; animation: arrive 0.4s var(--ease) 3s forwards; }
.arrived-file { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.5; }
.arrived-check { stroke: var(--success); stroke-width: 3.5; stroke-linecap: round; stroke-linejoin: round; }

@keyframes draw-arc { to { stroke-dashoffset: 0; } }
@keyframes arrive { to { opacity: 1; } }

/* ---------- Landing sections ---------- */

.kinds, .tools-home, .how, .why, .privacy {
  max-width: var(--content); margin: 0 auto;
  padding: var(--space-8) var(--space-5);
}

.kinds h2, .tools-home h2, .how h2, .why h2 { font-size: clamp(1.9rem, 3.6vw, 2.75rem); }

.kinds-strip {
  list-style: none; margin: var(--space-6) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(5, 1fr);
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden;
}
.kinds-strip li {
  display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-4);
  padding: var(--space-6) var(--space-5);
  font: 600 1.25rem/1 var(--font-display);
}
.kinds-strip li + li { border-inline-start: 1px solid var(--line); }
.kinds-strip svg { width: 30px; height: 30px; fill: none; stroke: var(--accent); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.kinds-note { margin-top: var(--space-5); color: var(--slate); max-width: 60ch; }

.steps {
  list-style: none; margin: var(--space-6) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6);
  counter-reset: none;
}
.steps li { position: relative; padding-top: var(--space-5); border-top: 2px solid var(--ink); }
.step-num {
  display: block; margin-bottom: var(--space-4);
  font: 700 3.5rem/1 var(--font-display); color: var(--accent); letter-spacing: -0.02em;
}
.steps h3 { font-size: 1.5rem; margin-bottom: var(--space-2); }
.steps p { color: var(--slate); max-width: 30ch; }

.why { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: var(--space-7); align-items: start; }
.why-list {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 0 var(--space-6);
}
.why-list li {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-4) 0; border-bottom: 1px solid var(--line);
  font-size: 1.125rem; font-weight: 500;
}
.why-list li::before {
  content: ""; flex: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--success-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 12.5l4 4L18 8.5' fill='none' stroke='%23138a55' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat;
}

.privacy-panel {
  background: var(--mist); border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 5vw, var(--space-8));
  display: grid; gap: var(--space-4); max-width: 820px;
}
.privacy-panel h2 { font-size: clamp(1.9rem, 3.6vw, 2.75rem); margin-bottom: var(--space-2); }
.privacy-panel p { color: var(--slate); max-width: 64ch; }
.privacy-panel p:first-of-type { color: var(--ink); font-size: 1.1875rem; }

/* ---------- Footer ---------- */

.site-footer { border-top: 1px solid var(--line); margin-top: var(--space-7); }
.footer-inner {
  max-width: var(--content); margin: 0 auto;
  padding: var(--space-6) var(--space-5);
  padding-bottom: max(var(--space-6), env(safe-area-inset-bottom));
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); flex-wrap: wrap;
}
.footer-brand { font: 700 1.1rem/1 var(--font-display); }
.site-footer nav { display: flex; gap: var(--space-5); flex-wrap: wrap; }
.site-footer a { color: var(--slate); text-decoration: none; font-size: 0.9375rem; }
.site-footer a:hover { color: var(--ink); }

body.in-app .site-footer { margin-top: var(--space-6); }

/* ==========================================================================
   App
   ========================================================================== */

.app-shell {
  max-width: 980px; margin: 0 auto;
  padding: var(--space-6) var(--space-5) var(--space-7);
}

.view { animation: view-in 0.28s var(--ease); }
@keyframes view-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.view-title { font-size: clamp(1.75rem, 4vw, 2.5rem); outline: none; }
.view-lede { margin-top: var(--space-3); color: var(--slate); font-size: 1.125rem; max-width: 46ch; }
.view-center { text-align: center; display: flex; flex-direction: column; align-items: center; padding: var(--space-8) 0; }
.view-center .view-lede { margin-inline: auto; }
.view-center .button-row { justify-content: center; margin-top: var(--space-6); }
.hint { margin-top: var(--space-5); color: var(--slate); font-size: 0.9375rem; }
.section-label { font-size: 1.125rem; margin-bottom: var(--space-4); }

/* choose */
.choices { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); margin-top: var(--space-6); }
.choice {
  display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-3);
  padding: var(--space-6);
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--paper);
}
.choice:first-child { background: var(--mist); border-color: transparent; }
.choice-icon { width: 44px; height: 44px; fill: none; stroke: var(--accent); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.choice h2 { font-size: 1.5rem; margin-top: var(--space-2); }
.choice p { color: var(--slate); margin-bottom: var(--space-3); flex: 1; }

.code-form { margin-top: var(--space-6); max-width: 420px; }
.code-form label { display: block; font-weight: 600; margin-bottom: var(--space-2); }
.code-row { display: flex; gap: var(--space-2); }
.code-row input { flex: 1; min-width: 0; }

input[type="text"], input[type="url"], textarea {
  width: 100%;
  min-height: 52px;
  padding: 14px 16px;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--paper); color: var(--ink);
  font: 1rem/1.4 var(--font-body);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input[type="text"]:focus, input[type="url"]:focus, textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.code-row input { font-family: var(--font-display); font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.code-row input::placeholder { letter-spacing: 0.02em; text-transform: none; font-weight: 400; }
textarea { resize: vertical; min-height: 160px; }
.field-error { margin-top: var(--space-2); color: var(--danger); font-size: 0.9375rem; }

/* host */
.qr-card {
  margin: var(--space-6) auto 0;
  max-width: 400px;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: #fff; color: #16181d;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--line);
  text-align: center;
}
.qr-box { width: 100%; max-width: 300px; aspect-ratio: 1; margin: 0 auto; display: grid; place-items: center; }
.qr-box svg { width: 100%; height: 100%; display: block; }
.qr-box .qr-placeholder { width: 100%; height: 100%; border-radius: var(--radius-md); background: #f3f4f7; animation: shimmer 1.2s ease-in-out infinite alternate; }
@keyframes shimmer { from { opacity: 0.55; } to { opacity: 1; } }
.qr-caption { margin-top: var(--space-5); font: 650 1.25rem/1.2 var(--font-display); }
.qr-code-line { margin-top: var(--space-2); color: #5a606c; font-size: 0.9375rem; }
.code-text { font-family: var(--font-display); font-size: 1.05rem; letter-spacing: 0.1em; color: #16181d; user-select: all; }

[data-view="host"] { text-align: center; }
[data-view="host"] .button-row { justify-content: center; margin-top: var(--space-5); }

.status-line { margin-top: var(--space-5); display: inline-flex; align-items: center; gap: 10px; font-weight: 600; }
.pulse { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.35; transform: scale(0.8); } }
.expiry { margin-top: var(--space-2); color: var(--slate); font-size: 0.9375rem; font-variant-numeric: tabular-nums; }

/* scan */
.scanner {
  position: relative;
  margin-top: var(--space-6);
  width: 100%; max-width: 420px; aspect-ratio: 1;
  border-radius: var(--radius-lg); overflow: hidden;
  background: #0d0f14;
}
.scanner video { width: 100%; height: 100%; object-fit: cover; display: block; }
.scanner-guide {
  position: absolute; inset: 16%;
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 999px rgba(13, 15, 20, 0.45);
  border: 3px solid rgba(255, 255, 255, 0.9);
  pointer-events: none;
  opacity: 0; transition: opacity 0.2s;
}
.scanner.live .scanner-guide { opacity: 1; }
.scanner-idle {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-4);
  padding: var(--space-6); text-align: center; color: #e9eaee;
}
.scanner.live .scanner-idle { display: none; }

/* connecting */
.spinner {
  width: 56px; height: 56px; margin-bottom: var(--space-5);
  border-radius: 50%;
  border: 4px solid var(--accent-soft); border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* message */
.message-icon {
  width: 72px; height: 72px; margin-bottom: var(--space-5);
  border-radius: 50%; display: grid; place-items: center;
  background: var(--mist);
}
.message-icon svg { width: 34px; height: 34px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.message-icon.is-error { background: var(--danger-soft); color: var(--danger); }
.message-icon.is-success { background: var(--success-soft); color: var(--success); }
.message-icon.is-info { background: var(--accent-soft); color: var(--accent-ink); }

/* ---------- room ---------- */

.room-head {
  display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-4);
  padding-bottom: var(--space-5); margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--line);
}
.connected-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font: 650 1.125rem/1 var(--font-display); color: var(--success);
}
.connected-badge svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.room-sub { margin-top: 6px; color: var(--slate); font-size: 0.9375rem; }

.room-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-7); }
.room-grid.has-activity { grid-template-columns: 1.05fr 0.95fr; }
.room-grid.has-activity .composer { order: -1; }

.dropzone {
  margin-top: var(--space-5);
  display: flex; flex-direction: column; align-items: center; gap: var(--space-3);
  padding: var(--space-4);
  border: 2px dashed var(--line); border-radius: var(--radius-lg);
  text-align: center;
  transition: border-color 0.15s, background-color 0.15s;
}
.dropzone.dragging { border-color: var(--accent); background: var(--accent-soft); }
.dropzone-icon { width: 44px; height: 44px; fill: none; stroke: var(--accent); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; margin-bottom: var(--space-2); }
.drop-hint { font-weight: 600; }

/* Send sections: one tile per kind of thing to send */
.send-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-3); width: 100%; }
.send-tile {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: 96px; padding: var(--space-4) var(--space-2);
  border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--paper, #fff);
  color: var(--ink); font: inherit; font-weight: 600; font-size: 0.9375rem; line-height: 1.2; text-align: center;
  cursor: pointer; transition: border-color .15s, background-color .15s, transform .1s;
}
.send-tile svg { width: 28px; height: 28px; fill: none; stroke: var(--accent); stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.send-tile:hover { border-color: var(--accent); background: var(--accent-soft); }
.send-tile:active { transform: scale(0.97); }
.send-tile:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
/* The camera tile opens the phone camera; on computers it would only open a file picker, so it shows on touch devices only. */
.send-tile-camera { display: none; }
@media (pointer: coarse) { .send-tile-camera { display: flex; } .dropzone .drop-hint { display: none; } }
@media (max-width: 380px) { .send-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.dropzone .drop-hint { margin-top: var(--space-4); color: var(--slate); font-weight: 500; font-size: 0.9375rem; }

.verify { margin-top: var(--space-3); display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-1) var(--space-3); font-size: 0.875rem; color: var(--slate); }
.verify-label { font-weight: 600; color: var(--ink); }
.verify-emoji { font-size: 1.375rem; letter-spacing: 0.12em; line-height: 1; }
.verify-hint { flex-basis: 100%; }
.field-note { font-size: 0.875rem; color: var(--slate); margin-top: var(--space-2); }
.auto-copy { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-5); font-size: 0.875rem; color: var(--slate); cursor: pointer; }
.auto-copy input { width: 18px; height: 18px; accent-color: var(--accent); }

.mini-form { margin-top: var(--space-5); display: grid; gap: var(--space-3); }
.form-title { font: 650 1.25rem/1.2 var(--font-display); }

/* selection */
.selection { margin-top: var(--space-5); display: grid; gap: var(--space-4); }
.selection-preview:empty { display: none; }
.selection-preview img, .selection-preview video {
  display: block; width: 100%; max-height: 360px; object-fit: contain;
  border-radius: var(--radius-md); background: var(--mist);
}
.selection-summary { font: 650 1.25rem/1.2 var(--font-display); }
.selection-summary .muted { font-family: var(--font-body); font-weight: 500; font-size: 1rem; }
.selection-list { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: var(--radius-md); max-height: 320px; overflow-y: auto; }
.selection-list li { display: flex; align-items: center; gap: var(--space-3); padding: 10px 12px; }
.selection-list li + li { border-top: 1px solid var(--line); }
.selection-list .thumb { flex: none; width: 40px; height: 40px; border-radius: 8px; overflow: hidden; background: var(--mist); display: grid; place-items: center; }
.selection-list .thumb img { width: 100%; height: 100%; object-fit: cover; }
.selection-list .thumb svg, .item-icon svg { width: 22px; height: 22px; fill: none; stroke: var(--slate); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.selection-list .meta { flex: 1; min-width: 0; }
.selection-list .name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.selection-list .size { color: var(--slate); font-size: 0.875rem; }
.icon-btn {
  flex: none; width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  border: 0; background: transparent; color: var(--slate); cursor: pointer;
}
.icon-btn:hover { background: var(--mist); color: var(--ink); }
.icon-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; }

/* activity */
.activity-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-4); }

.item {
  border: 1px solid var(--line); border-radius: var(--radius-md);
  background: var(--paper);
  padding: var(--space-5);
  display: grid; gap: var(--space-3);
  animation: view-in 0.25s var(--ease);
}
.item.is-incoming { background: var(--mist); border-color: transparent; }
.item-head { display: flex; align-items: center; gap: var(--space-3); }
.item-icon { flex: none; width: 44px; height: 44px; border-radius: 12px; background: var(--paper); border: 1px solid var(--line); display: grid; place-items: center; }
.item-titles { flex: 1; min-width: 0; }
.item-kicker { font-size: 0.875rem; color: var(--slate); font-weight: 500; }
.item-kicker.is-done { color: var(--success); font-weight: 600; }
.item-kicker.is-failed { color: var(--danger); font-weight: 600; }
.item-kicker svg { width: 15px; height: 15px; margin-inline-end: 5px; vertical-align: -2px; fill: none; stroke: currentColor; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.item-name { font-weight: 650; font-size: 1.0625rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.progress { height: 8px; border-radius: var(--radius-pill); background: color-mix(in srgb, var(--line) 80%, transparent); overflow: hidden; }
.progress-bar { height: 100%; width: 0; border-radius: inherit; background: var(--accent); transition: width 0.2s linear; }
.item.is-done .progress-bar { background: var(--success); }
.item.is-failed .progress-bar { background: var(--danger); }
.progress.small { height: 4px; }

.item-stats { display: flex; flex-wrap: wrap; gap: 4px 14px; color: var(--slate); font-size: 0.875rem; font-variant-numeric: tabular-nums; }
.item-stats .pct { color: var(--ink); font-weight: 700; }

.item-files { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); }
.item-file { display: grid; grid-template-columns: 1fr auto; gap: 4px var(--space-3); align-items: center; padding: var(--space-2) 0; }
.item-file + .item-file { border-top: 1px solid var(--line); }
.item-file .fname { font-weight: 600; font-size: 0.9375rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.item-file .fsize { color: var(--slate); font-size: 0.8125rem; font-variant-numeric: tabular-nums; text-align: end; }
.item-file .progress { grid-column: 1 / -1; }
.item-file .file-actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.item-file .preview { grid-column: 1 / -1; }
.preview:not(:empty) { margin: var(--space-3) 0 var(--space-4); }

.preview img, .preview video {
  display: block; width: 100%; max-height: 340px; object-fit: contain;
  border-radius: var(--radius-sm); background: var(--paper);
}

.item-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.item-actions .btn, .file-actions .btn { --btn-h: 44px; padding: 0 18px; font-size: 0.9375rem; }

.text-body {
  margin: 0;
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--paper);
  white-space: pre-wrap; word-break: break-word; overflow-wrap: anywhere;
  max-height: 260px; overflow-y: auto;
  font: 1rem/1.5 var(--font-body);
}
.link-body { font-weight: 600; word-break: break-all; }

/* drop overlay (whole window while dragging) */
.drop-overlay {
  position: fixed; inset: 0; z-index: 50;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 4px dashed var(--accent);
  pointer-events: none;
}
.drop-overlay p { font: 700 1.75rem/1 var(--font-display); color: var(--accent-ink); background: var(--paper); padding: 18px 28px; border-radius: var(--radius-pill); box-shadow: var(--shadow-soft); }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: max(24px, env(safe-area-inset-bottom)); z-index: 60;
  transform: translateX(-50%);
  padding: 12px 20px; border-radius: var(--radius-pill);
  background: var(--ink); color: var(--paper);
  font-weight: 600; font-size: 0.9375rem;
  box-shadow: var(--shadow-soft);
  animation: toast-in 0.2s var(--ease);
  max-width: calc(100vw - 32px);
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0); } }

.noscript { padding: 16px; text-align: center; background: var(--danger-soft); color: var(--danger); }

/* ---------- simple content pages ---------- */

.page {
  max-width: 720px; margin: 0 auto;
  padding: var(--space-8) var(--space-5);
}
.page h1 { font-size: clamp(2.2rem, 5vw, 3.25rem); margin-bottom: var(--space-5); }
.page h2 { font-size: 1.5rem; margin: var(--space-7) 0 var(--space-3); }
.page p, .page li { color: var(--slate); max-width: 65ch; }
.page p + p { margin-top: var(--space-3); }
.page ul { padding-inline-start: 1.2em; display: grid; gap: var(--space-2); }
.page .lede { font-size: 1.1875rem; color: var(--ink); }

body.in-app .site-header [data-action="start"] { visibility: hidden; }

/* read-only room after the other device left: transfers stay downloadable */
[data-view="room"].is-ended .connected-badge { color: var(--slate); }


/* ---------------------------------------------------------------- languages */
.lang-menu {
  flex-basis: 100%;
  display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4);
  padding-top: var(--space-4); border-top: 1px solid var(--line);
}
.site-footer .lang-menu a { font-size: 0.875rem; }
.site-footer .lang-menu a[aria-current] { color: var(--ink); font-weight: 600; }

/* The display font covers Latin scripts only; other scripts use a matching system face. */
:root:lang(ru) { --font-display: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif; }
:root:lang(ar) {
  --font-display: "Segoe UI", "Noto Sans Arabic", "Geeza Pro", Tahoma, system-ui, sans-serif;
  --font-body: "Segoe UI", "Noto Sans Arabic", "Geeza Pro", Tahoma, system-ui, sans-serif;
}
:root:lang(zh-Hans) {
  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Noto Sans CJK SC", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Noto Sans CJK SC", system-ui, sans-serif;
}
:root:lang(ja) {
  --font-display: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", Meiryo, "Noto Sans JP", "Noto Sans CJK JP", system-ui, sans-serif;
  --font-body: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", Meiryo, "Noto Sans JP", "Noto Sans CJK JP", system-ui, sans-serif;
}
:root:lang(ko) {
  --font-display: "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", "Noto Sans CJK KR", system-ui, sans-serif;
  --font-body: "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", "Noto Sans CJK KR", system-ui, sans-serif;
  word-break: keep-all;   /* don't split Korean words across lines */
}
/* The display font lacks Turkish (ğ ş İ) and Vietnamese letters; use one system face for the whole heading. */
:root:lang(tr), :root:lang(vi) { --font-display: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif; }
:root:lang(ja) :is(h1, h2, h3, .view-title, .brand, .footer-brand),
:root:lang(ko) :is(h1, h2, h3, .view-title, .brand, .footer-brand) { letter-spacing: 0; }
:root:lang(ja) .hero h1, :root:lang(ko) .hero h1, :root:lang(vi) .hero h1, :root:lang(tr) .hero h1 { line-height: 1.2; }
/* Break Japanese headings at natural phrase boundaries where the browser supports it. */
:root:lang(ja) :is(h1, h2, h3, .view-title) { word-break: auto-phrase; }
:root:lang(ja) .hero h1, :root:lang(ko) .hero h1 { max-width: 20ch; }

/* Tight tracking breaks Arabic joining and crowds Chinese; reset it. */
:root:lang(ar) :is(h1, h2, h3, .view-title, .brand, .footer-brand),
:root:lang(zh-Hans) :is(h1, h2, h3, .view-title, .brand, .footer-brand) { letter-spacing: 0; }
:root:lang(ar) .hero h1, :root:lang(zh-Hans) .hero h1 { line-height: 1.2; }
:root:lang(zh-Hans) .hero h1 { max-width: 20ch; }

/* Codes and web addresses are always left-to-right, even on Arabic pages. */
.code-row input, #link-input, .code-text { direction: ltr; }
[dir="rtl"] .code-row input, [dir="rtl"] #link-input { text-align: right; }

/* ---------------------------------------------------------------- guides */
.guide-back { margin-bottom: var(--space-4); font-size: 0.9375rem; }
.guide-back a, .guide-card h2 a { color: var(--accent); text-decoration: none; }
.guide-back a:hover, .guide-card h2 a:hover { text-decoration: underline; }
.guide-meta { font-size: 0.875rem; color: var(--slate); margin-bottom: var(--space-4); }
.guide-body h3 { font-size: 1.1875rem; margin: var(--space-6) 0 var(--space-2); }
.guide-body ol { padding-inline-start: 1.4em; display: grid; gap: var(--space-2); }
.guide-body ol li, .guide-body ul li { color: var(--slate); max-width: 65ch; }
.guide-body p + ul, .guide-body p + ol, .guide-body ul + p, .guide-body ol + p { margin-top: var(--space-3); }
.guide-body a { color: var(--accent); }
.guide-body strong { color: var(--ink); }
.guide-body img { max-width: 100%; height: auto; border-radius: var(--radius-sm); margin: var(--space-4) 0; }
.guide-body blockquote {
  margin: var(--space-4) 0; padding: var(--space-3) var(--space-4);
  border-inline-start: 3px solid var(--accent); background: var(--mist); border-radius: var(--radius-sm);
}
.guide-body code { font-size: 0.9em; background: var(--mist); padding: 0.1em 0.35em; border-radius: 6px; }
.guide-body .table-wrap { overflow-x: auto; margin: var(--space-4) 0; }
.guide-body table { border-collapse: collapse; min-width: 100%; font-size: 0.9375rem; }
.guide-body th, .guide-body td { text-align: start; padding: var(--space-2) var(--space-3); border-bottom: 1px solid var(--line); color: var(--slate); }
.guide-body th { color: var(--ink); }
.guide-cta {
  margin-top: var(--space-8); padding: var(--space-6); border-radius: var(--radius-md);
  background: var(--mist); display: grid; gap: var(--space-3); justify-items: start;
}
.guide-cta h2 { margin: 0 !important; }
.guide-list { list-style: none; padding: 0 !important; display: grid; gap: var(--space-4) !important; margin-top: var(--space-6); }
.guide-card { padding: var(--space-5); border: 1px solid var(--line); border-radius: var(--radius-md); max-width: none !important; }
.guide-card h2 { font-size: 1.25rem; margin: 0 0 var(--space-2) !important; }
.guide-card .guide-meta { margin: var(--space-2) 0 0; }
.guide-body { margin-top: var(--space-5); }
.guide-notice { margin-top: var(--space-5); padding: var(--space-3) var(--space-4); background: var(--mist); border-radius: var(--radius-sm); }
.guide-card[dir] { text-align: start; }   /* English card inside an RTL page: align with its own direction */

/* ---------------------------------------------------------------- tools */
.tool-grid { list-style: none; padding: 0 !important; margin: var(--space-5) 0 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--space-3); }
.tool-grid li { max-width: none !important; }
.tool-card {
  display: grid; grid-template-columns: auto 1fr; gap: var(--space-1) var(--space-3); align-items: start; align-content: start;
  height: 100%; padding: var(--space-4); border: 1px solid var(--line); border-radius: var(--radius-md);
  background: var(--paper); color: var(--ink); text-decoration: none; transition: border-color .15s, transform .1s;
}
.tool-card:hover { border-color: var(--accent); }
.tool-card:active { transform: scale(0.99); }
.tool-card .tool-icon { grid-row: span 2; margin-top: 2px; }
.tool-card-title { font-weight: 700; }
.tool-card-text { grid-column: 2; font-size: 0.875rem; color: var(--slate); line-height: 1.4; }
.tool-icon { width: 28px; height: 28px; fill: none; stroke: var(--accent); stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.tools-home-lede { color: var(--slate); max-width: 60ch; margin-top: var(--space-3); }

.tool-head { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-4); }
.tool-head h1 { margin: 0 !important; }
.tool-head .tool-icon { width: 40px; height: 40px; }
.tool-private { display: inline-flex; align-items: center; gap: var(--space-2); margin-top: var(--space-3); padding: var(--space-2) var(--space-3); border-radius: var(--radius-pill); background: var(--mist); font-size: 0.875rem; color: var(--ink) !important; }
.tool-private svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; }
.tool-widget { margin: var(--space-6) 0 var(--space-4); padding: var(--space-5); border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--paper); }
.tool-steps { padding-inline-start: 1.4em; display: grid; gap: var(--space-2); }
.tool-steps li { color: var(--slate); }

.tool-drop { display: grid; justify-items: center; gap: var(--space-3); padding: var(--space-6) var(--space-4); border: 2px dashed var(--line); border-radius: var(--radius-md); text-align: center; transition: border-color .15s, background-color .15s; }
.tool-drop.dragging { border-color: var(--accent); background: var(--accent-soft); }
.tool-drop .drop-hint { color: var(--slate); font-weight: 500; }
.button-row-center { justify-content: center; }
.tool-options { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-4); align-items: end; margin-top: var(--space-5); }
.field-label { display: block; font-weight: 600; font-size: 0.875rem; margin: var(--space-3) 0 var(--space-2); color: var(--ink); }
.tool-options .field-label { margin-top: 0; }
.tool-widget select, .tool-widget input[type="text"], .tool-widget input[type="number"], .tool-widget textarea {
  width: 100%; padding: 0.7rem 0.85rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--paper); color: var(--ink); font: inherit;
}
.tool-widget textarea { resize: vertical; }
.tool-widget input[type="range"] { width: 100%; accent-color: var(--accent); }
.check { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-3); font-size: 0.9375rem; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }
.tool-status { margin-top: var(--space-3); font-size: 0.9375rem; color: var(--slate); min-height: 1.4em; }

.tool-results { list-style: none; padding: 0; margin: var(--space-5) 0 0; display: grid; gap: var(--space-2); }
.result { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-2) var(--space-4); padding: var(--space-3) var(--space-4); border: 1px solid var(--line); border-radius: var(--radius-sm); max-width: none !important; }
.result-main { display: grid; gap: 2px; min-width: 0; }
.result-name { font-weight: 600; color: var(--ink); overflow-wrap: anywhere; }
.result-info { font-size: 0.875rem; color: var(--slate); font-variant-numeric: tabular-nums; }
.result-note { font-size: 0.8125rem; color: var(--slate); }
.result-note.is-error { color: var(--danger); }
.result-actions { display: flex; gap: var(--space-2); }
.tool-widget [data-actions] { margin-top: var(--space-4); }

.page-list { list-style: none; padding: 0; margin: var(--space-5) 0 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: var(--space-3); }
.page-item { position: relative; display: grid; gap: var(--space-2); padding: var(--space-2); border: 1px solid var(--line); border-radius: var(--radius-sm); max-width: none !important; }
.page-item img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; border-radius: 8px; background: var(--mist); }
.page-number { position: absolute; top: 10px; inset-inline-start: 10px; min-width: 24px; height: 24px; padding: 0 6px; border-radius: 12px; background: var(--ink); color: var(--paper); font-size: 0.75rem; font-weight: 700; display: grid; place-items: center; }
.page-name { font-size: 0.75rem; color: var(--slate); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.page-actions { display: flex; justify-content: space-between; }
.page-actions .icon-btn { width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--line); background: var(--paper); color: var(--ink); cursor: pointer; font-size: 1rem; }
.page-actions .icon-btn:disabled { opacity: .35; cursor: default; }

.segmented { display: inline-flex; padding: 4px; border-radius: var(--radius-pill); background: var(--mist); gap: 4px; margin-bottom: var(--space-4); }
.segment { border: 0; background: transparent; color: var(--slate); font: inherit; font-weight: 600; padding: 0.5rem 1rem; border-radius: var(--radius-pill); cursor: pointer; }
.segment.is-active { background: var(--paper); color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.qr-layout { display: grid; grid-template-columns: 1fr 280px; gap: var(--space-6); align-items: start; }
.qr-output { display: grid; justify-items: center; gap: var(--space-3); text-align: center; }
.qr-preview { width: 100%; max-width: 260px; aspect-ratio: 1; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; display: grid; place-items: center; }
.qr-preview:empty { background: var(--mist); }
.qr-preview svg { width: 100%; height: 100%; display: block; }
@media (max-width: 720px) { .qr-layout { grid-template-columns: 1fr; } .tool-widget { padding: var(--space-4); } }
.doc-list { list-style: none; padding: 0 !important; margin: var(--space-5) 0 0; display: grid; gap: var(--space-2); }
.doc-item { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); border: 1px solid var(--line); border-radius: var(--radius-sm); max-width: none !important; }
.doc-number { min-width: 26px; height: 26px; border-radius: 13px; background: var(--ink); color: var(--paper); font-size: 0.8125rem; font-weight: 700; display: grid; place-items: center; flex: none; }
.doc-main { display: grid; gap: 2px; min-width: 0; flex: 1; }
.doc-item .page-actions { gap: var(--space-2); }
.doc-summary { display: grid; gap: 2px; margin-top: var(--space-5); padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm); background: var(--mist); }
.level-list { border: 0; padding: 0; margin: var(--space-5) 0 0; display: grid; gap: var(--space-2); }
.level-option { display: flex; flex-direction: row; gap: var(--space-3); align-items: flex-start; padding: var(--space-3) var(--space-4); border: 1px solid var(--line); border-radius: var(--radius-sm); cursor: pointer; font-size: 0.9375rem; color: var(--slate); }
.level-option strong { color: var(--ink); }
.level-option input { margin-top: 3px; width: 18px; height: 18px; accent-color: var(--accent); flex: none; }
.level-option:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.tool-widget [data-result] { margin-top: var(--space-4); }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); margin-top: var(--space-5); }
.compare figure { margin: 0; display: grid; gap: var(--space-2); }
.compare img { width: 100%; aspect-ratio: 1; object-fit: contain; background: var(--mist); border-radius: var(--radius-sm); image-rendering: auto; }
.compare img:not([src]) { visibility: hidden; }
.compare figcaption { font-size: 0.8125rem; color: var(--slate); text-align: center; font-variant-numeric: tabular-nums; }
.tool-widget [data-result-actions] { margin-top: var(--space-4); }

/* ---------------------------------------------------------------- remember my devices */
.my-devices { margin: var(--space-5) 0 var(--space-6); padding: var(--space-5); border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--paper); }
.my-devices h2 { font-size: 1.25rem; margin: 0 0 var(--space-3); }
.device-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
.device-item { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-3); padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm); background: var(--mist); }
.device-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--line); flex: none; }
.device-item.is-online .device-dot { background: var(--success, #1a8f4e); box-shadow: 0 0 0 3px color-mix(in srgb, var(--success, #1a8f4e) 25%, transparent); }
.device-main { display: grid; gap: 2px; flex: 1; min-width: 140px; }
.device-name { font-weight: 700; color: var(--ink); overflow-wrap: anywhere; }
.device-status { font-size: 0.8125rem; color: var(--slate); }
.device-actions { display: flex; flex-wrap: wrap; gap: var(--space-1); }
.device-self { margin-top: var(--space-4); font-size: 0.875rem; color: var(--slate); }
.device-self strong { color: var(--ink); }
.link-btn { border: 0; background: none; padding: 0 0.2em; color: var(--accent); font: inherit; font-weight: 600; cursor: pointer; text-decoration: underline; text-underline-offset: 2px; }

.pair-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-3); margin-top: var(--space-3); }
.pair-note { font-size: 0.8125rem; color: var(--slate); }
.pair-offer { margin-top: var(--space-3); padding: var(--space-4); border-radius: var(--radius-md); background: var(--accent-soft); border: 1px solid var(--accent); }
.pair-offer-title { font-weight: 700; color: var(--ink); }
.pair-offer-body { font-size: 0.875rem; color: var(--slate); margin: var(--space-1) 0 var(--space-3); }

.incoming {
  position: fixed; z-index: 60; inset-inline: var(--space-4); bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0px));
  max-width: 420px; margin-inline: auto; padding: var(--space-5); border-radius: var(--radius-lg);
  background: var(--paper); border: 1px solid var(--line); box-shadow: 0 18px 48px rgba(0, 0, 0, .22);
  animation: incoming-in .25s ease-out;
}
.incoming-title { font-weight: 700; font-size: 1.125rem; color: var(--ink); }
.incoming-body { color: var(--slate); margin: var(--space-1) 0 var(--space-4); font-size: 0.9375rem; }
@keyframes incoming-in { from { transform: translateY(16px); opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .incoming { animation: none; } }
.device-actions .btn-ghost { padding-inline: var(--space-3); }
@media (max-width: 560px) {
  .device-actions { width: 100%; }
  .device-actions .btn-primary { flex: 1 1 100%; }
  .device-actions .btn-ghost { flex: 1; }
}

/* ---------------------------------------------------------------- theme switch */
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }
.theme-toggle {
  display: inline-grid; place-items: center; width: 42px; height: 42px; flex: none;
  border: 1px solid var(--line); border-radius: var(--radius-pill); background: var(--paper); color: var(--ink); cursor: pointer;
  transition: border-color .15s, background-color .15s;
}
.theme-toggle:hover { border-color: var(--slate); }
.theme-toggle:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.theme-toggle svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme-effective="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme-effective="dark"] .theme-toggle .icon-moon { display: none; }

/* ==========================================================================
   Home page v2: all-in-one hero, category tiles, grouped tool sections
   ========================================================================== */
:root {
  --cat-transfer: #3b3be6; --cat-transfer-soft: #ececfd;
  --cat-pdf: #d6453d;      --cat-pdf-soft: #fdecea;
  --cat-image: #138a55;    --cat-image-soft: #e5f5ec;
  --cat-media: #8a3ffc;    --cat-media-soft: #f1e9ff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --cat-transfer: #8b8bff; --cat-transfer-soft: #23244a;
    --cat-pdf: #ff8a80;      --cat-pdf-soft: #3a1f1d;
    --cat-image: #4cc98a;    --cat-image-soft: #16301f;
    --cat-media: #b996ff;    --cat-media-soft: #2c2143;
  }
}
:root[data-theme="dark"] {
  --cat-transfer: #8b8bff; --cat-transfer-soft: #23244a;
  --cat-pdf: #ff8a80;      --cat-pdf-soft: #3a1f1d;
  --cat-image: #4cc98a;    --cat-image-soft: #16301f;
  --cat-media: #b996ff;    --cat-media-soft: #2c2143;
}
[data-category="transfer"] { --cat: var(--cat-transfer); --cat-soft: var(--cat-transfer-soft); }
[data-category="pdf"]      { --cat: var(--cat-pdf);      --cat-soft: var(--cat-pdf-soft); }
[data-category="image"]    { --cat: var(--cat-image);    --cat-soft: var(--cat-image-soft); }
[data-category="media"]    { --cat: var(--cat-media);    --cat-soft: var(--cat-media-soft); }

/* header */
.header-actions { display: flex; align-items: center; gap: var(--space-3); flex: none; }
.site-nav a { font-weight: 600; }

/* hero */
.hero { padding: var(--space-8) var(--space-5) var(--space-8); grid-template-columns: 1.05fr 0.95fr; gap: var(--space-7); }
.hero h1 { font-size: clamp(2.35rem, 4.9vw, 4.25rem); line-height: 1.02; max-width: 16ch; }
.hero-sub { max-width: 44ch; font-size: clamp(1.05rem, 1.6vw, 1.25rem); }
.hero-cta { gap: var(--space-3); }
.trust-chips { list-style: none; padding: 0; margin: var(--space-6) 0 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.trust-chips li { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px 6px 8px; border-radius: var(--radius-pill); background: var(--mist); font-size: 0.875rem; font-weight: 600; color: var(--ink); }
.trust-chips svg { width: 16px; height: 16px; fill: none; stroke: var(--success); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }

.category-tiles { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.cat-tile {
  display: grid; gap: 6px; align-content: start; min-height: 150px; padding: var(--space-5);
  border-radius: var(--radius-md); background: var(--cat-soft); color: var(--ink); text-decoration: none;
  border: 1px solid transparent; transition: transform .15s var(--ease), border-color .15s, box-shadow .15s;
}
.cat-tile svg { width: 34px; height: 34px; fill: none; stroke: var(--cat); stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; margin-bottom: var(--space-2); }
.cat-tile strong { font: 700 clamp(1.15rem, 1.8vw, 1.4rem)/1.15 var(--font-display); letter-spacing: -0.01em; }
.cat-tile span { font-size: 0.9rem; color: var(--slate); line-height: 1.35; }
.cat-tile:hover { transform: translateY(-2px); border-color: var(--cat); box-shadow: var(--shadow-soft); }
.cat-tile:focus-visible { outline: 3px solid var(--cat); outline-offset: 3px; }

/* sections */
.home-section { max-width: var(--content); margin: 0 auto; padding: var(--space-8) var(--space-5); scroll-margin-top: 80px; }
.home-section + .home-section { border-top: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: var(--space-6); }
.section-kicker { display: inline-flex; align-items: center; gap: 8px; font-size: 0.8125rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--cat, var(--accent)); }
.section-kicker::before { content: ""; width: 10px; height: 10px; border-radius: 3px; background: var(--cat, var(--accent)); }
.section-head h2 { margin-top: var(--space-2); font-size: clamp(1.9rem, 3.6vw, 2.85rem); line-height: 1.08; letter-spacing: -0.02em; }
.section-lede { margin-top: var(--space-3); font-size: clamp(1rem, 1.5vw, 1.15rem); color: var(--slate); }
#transfer .section-lede { font-weight: 600; color: var(--ink); letter-spacing: 0.01em; }

.transfer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-7); align-items: center; }
.transfer-card { padding: var(--space-5); border-radius: var(--radius-lg); background: var(--cat-soft); }
.transfer-card .kinds-strip { margin-top: var(--space-4); background: var(--paper); border-radius: var(--radius-md); }
.transfer-art { max-width: 460px; margin: 0 auto; }
.transfer-steps .steps { grid-template-columns: 1fr; gap: var(--space-4); }
.transfer-steps .steps li { display: grid; grid-template-columns: auto 1fr; gap: 2px var(--space-4); padding-top: var(--space-4); border-top: 1px solid var(--line); }
.transfer-steps .step-num { grid-row: span 2; position: static; width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; background: var(--cat); color: #fff; font-weight: 700; }
.transfer-steps .steps h3 { font-size: 1.25rem; margin: 0; }
.transfer-steps .steps p { max-width: none; }
.transfer-steps .kinds-note { margin: var(--space-4) 0 var(--space-5); }

/* tool cards (home, hub, "more tools") */
.tool-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: var(--space-3); }
.tool-card {
  padding: var(--space-5); gap: 6px var(--space-4); border-radius: var(--radius-md);
  transition: transform .15s var(--ease), border-color .15s, box-shadow .15s;
}
.tool-card .tool-icon { width: 46px; height: 46px; padding: 11px; border-radius: 14px; background: var(--cat-soft, var(--accent-soft)); stroke: var(--cat, var(--accent)); margin-top: 0; }
.tool-card-title { font: 700 1.15rem/1.2 var(--font-display); letter-spacing: -0.01em; }
.tool-card-text { font-size: 0.9rem; }
.tool-card:hover { transform: translateY(-2px); border-color: var(--cat, var(--accent)); box-shadow: var(--shadow-soft); }
.tool-card:focus-visible { outline: 3px solid var(--cat, var(--accent)); outline-offset: 3px; }
.tool-page .tool-head .tool-icon { stroke: var(--cat, var(--accent)); }

/* tools hub groups */
.hub-group { margin-top: var(--space-7); }
.hub-group h2 { display: flex; align-items: center; gap: 10px; font-size: 1.5rem; margin: 0 0 var(--space-3) !important; }
.hub-group h2::before { content: ""; width: 12px; height: 12px; border-radius: 4px; background: var(--cat); }

/* footer */
.site-footer { background: var(--mist); border-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(5, minmax(0, 1fr)); gap: var(--space-6); align-items: start; padding-block: var(--space-8) var(--space-6) !important; }
.footer-about .brand { display: inline-flex; }
.footer-tagline { margin-top: var(--space-3); color: var(--slate); font-size: 0.9375rem; max-width: 30ch; }
.footer-heading { font-weight: 700; font-size: 0.9375rem; color: var(--ink); margin-bottom: var(--space-3); }
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
.site-footer .footer-col a { font-size: 0.9rem; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--space-4); border-top: 1px solid var(--line); padding-block: var(--space-5) !important; }
.footer-bottom p { color: var(--slate); font-size: 0.875rem; }
.footer-bottom .lang-menu { margin: 0; }

@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-about { grid-column: 1 / -1; }
}
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; gap: var(--space-6); padding-top: var(--space-6); }
  .transfer-grid { grid-template-columns: 1fr; gap: var(--space-5); }
}
@media (max-width: 760px) {
  .header-inner { flex-wrap: wrap; row-gap: var(--space-2); }
  .site-nav { display: flex !important; order: 3; width: 100%; margin: 0; gap: var(--space-4); overflow-x: auto; scrollbar-width: none; padding-bottom: 2px; }
  .site-nav::-webkit-scrollbar { display: none; }
  .site-nav a { white-space: nowrap; font-size: 0.875rem; }
  .header-actions { margin-inline-start: auto; }
  .home-section { padding: var(--space-7) var(--space-4); }
  .cat-tile { min-height: 128px; padding: var(--space-4); }
  .tool-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-5); }
}
@media (max-width: 420px) {
  .header-actions .btn { padding-inline: 14px; }
  .hero-cta .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .cat-tile, .tool-card { transition: none; }
  .cat-tile:hover, .tool-card:hover { transform: none; }
}
.about-values { list-style: none; padding: 0 !important; display: grid; gap: var(--space-3) !important; }
.about-values li { padding: var(--space-4) var(--space-5); border-radius: var(--radius-md); background: var(--mist); max-width: none !important; }
.about-values strong { color: var(--ink); }

/* refinements */
.hero { padding-bottom: var(--space-7); }
.hero h1 { font-size: clamp(2.2rem, 4.1vw, 3.6rem); max-width: 18ch; }
.transfer-steps .step-num { color: var(--paper); }
/* Laptops and tablets: tall cards so a whole group fits in one row. Phones keep the compact row layout. */
@media (min-width: 761px) {
  .tool-grid { grid-template-columns: repeat(auto-fill, minmax(196px, 1fr)); }
  .tool-card { grid-template-columns: 1fr; align-content: start; gap: var(--space-2); padding: var(--space-5) var(--space-4); }
  .tool-card .tool-icon { grid-row: auto; margin-bottom: var(--space-2); }
  .tool-card-text { grid-column: auto; }
}

/* File transfer section: cards like the tool sections, then the three steps */
.transfer-how { margin-top: var(--space-7); }
.transfer-cta { margin-top: var(--space-6); }
@media (min-width: 761px) { .tool-grid[data-category="transfer"] { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 761px) and (max-width: 960px) { .tool-grid[data-category="transfer"] { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.size-input { display: flex; gap: var(--space-2); }
.size-input input { flex: 1; min-width: 0; }
.size-input select { width: auto !important; }
.size-presets { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.chip-btn { border: 1px solid var(--line); background: var(--paper); color: var(--ink); font: inherit; font-weight: 600; font-size: 0.875rem; padding: 6px 14px; border-radius: var(--radius-pill); cursor: pointer; }
.chip-btn:hover { border-color: var(--cat, var(--accent)); }
.chip-btn.is-active { background: var(--cat, var(--accent)); border-color: var(--cat, var(--accent)); color: var(--paper); }
.photo-stage { margin-top: var(--space-5); display: grid; place-items: center; padding: var(--space-4); border-radius: var(--radius-md); background: var(--mist); }
.photo-stage canvas { width: min(300px, 100%); height: auto; border-radius: 4px; box-shadow: var(--shadow-soft); cursor: grab; touch-action: none; }
.photo-stage canvas:active { cursor: grabbing; }
.photo-stage canvas:focus-visible { outline: 3px solid var(--cat, var(--accent)); outline-offset: 3px; }
.photo-info { margin-top: var(--space-3); text-align: center; font-size: 0.875rem; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }
.photo-custom { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.photo-editor .button-row { margin-top: var(--space-4); }
.upload-progress { margin-top: var(--space-4); }
.upload-progress progress { width: 100%; height: 10px; accent-color: var(--cat, var(--accent)); }
.checkerboard { background-color: #fff; background-image: linear-gradient(45deg, #d9dce3 25%, transparent 25%), linear-gradient(-45deg, #d9dce3 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #d9dce3 75%), linear-gradient(-45deg, transparent 75%, #d9dce3 75%); background-size: 20px 20px; background-position: 0 0, 0 10px, 10px -10px, -10px 0; }
.bg-result { margin-top: var(--space-4); }
.ocr-result { margin-top: var(--space-4); }
.ocr-result textarea { font-size: 0.95rem; line-height: 1.5; }
.password-fields input { font-family: inherit; }
.thumb-grid { list-style: none; padding: 0 !important; margin: var(--space-4) 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: var(--space-3) !important; }
.thumb-grid li { max-width: none !important; }
.thumb { position: relative; display: grid; gap: 6px; width: 100%; padding: 6px; border: 2px solid var(--line); border-radius: var(--radius-sm); background: var(--paper); cursor: pointer; font: inherit; color: var(--ink); }
.thumb:hover { border-color: var(--cat, var(--accent)); }
.thumb:focus-visible { outline: 3px solid var(--cat, var(--accent)); outline-offset: 2px; }
.thumb-img { display: grid; place-items: center; aspect-ratio: 3 / 4; background: var(--mist); border-radius: 6px; overflow: hidden; }
.thumb-img canvas { width: 100%; height: 100%; object-fit: contain; }
.thumb-num { font-size: 0.8125rem; font-weight: 700; }
.thumb.is-marked { border-color: var(--danger); background: var(--danger-soft); }
.thumb.is-marked .thumb-img { opacity: .35; }
.thumb.is-marked::after { content: "✕"; position: absolute; top: 10px; inset-inline-end: 10px; width: 26px; height: 26px; border-radius: 13px; display: grid; place-items: center; background: var(--danger); color: #fff; font-weight: 700; }
.meta-found { list-style: none; padding: 0 !important; margin: 6px 0 2px; display: grid; gap: 2px; }
.meta-found li { font-size: 0.8125rem; color: var(--danger); max-width: none !important; }
.meta-found li::before { content: "• "; }
.result-note.is-good { color: var(--success); font-weight: 600; }

/* ---------------------------------------------------------------- PDF editor (Edit PDF, Sign PDF) */
.edit-toolbar { position: sticky; top: calc(64px + env(safe-area-inset-top, 0px)); z-index: 5; display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2);
  margin-top: var(--space-4); padding: var(--space-2); border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--paper); box-shadow: var(--shadow-soft); }
.edit-tool { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border: 1px solid var(--line); border-radius: var(--radius-pill); background: var(--paper); color: var(--ink); font: inherit; font-weight: 600; font-size: 0.875rem; cursor: pointer; }
.edit-tool svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.edit-tool[aria-pressed="true"] { background: var(--cat, var(--accent)); border-color: var(--cat, var(--accent)); color: var(--paper); }
.edit-toolbar-field { display: inline-flex; align-items: center; gap: 6px; font-size: 0.8125rem; color: var(--slate); margin-inline-start: auto; }
.edit-toolbar-field + .edit-toolbar-field { margin-inline-start: 0; }
.edit-toolbar-field select { width: auto !important; padding: 6px 28px 6px 10px; }
.edit-toolbar-field input[type="color"] { width: 36px; height: 32px; padding: 0; border: 1px solid var(--line); border-radius: 8px; background: none; }
.edit-pages { list-style: none; padding: 0 !important; margin: var(--space-4) 0 0; display: grid; gap: var(--space-5) !important; }
.edit-pages li { max-width: none !important; display: grid; gap: 6px; justify-items: center; }
.edit-page { position: relative; width: 100%; max-width: 860px; background: #fff; box-shadow: var(--shadow-soft); border-radius: 4px; overflow: hidden; }
.edit-canvas, .edit-canvas canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.edit-overlay { position: absolute; inset: 0; touch-action: pan-y; }
.is-placing .edit-overlay { cursor: crosshair; }
.edit-page-num { font-size: 0.8125rem; color: var(--slate); }
.edit-obj { position: absolute; box-sizing: border-box; outline: 1px dashed transparent; cursor: move; touch-action: none; }
.edit-obj:hover, .edit-obj:focus-visible { outline-color: rgba(47, 111, 237, .6); }
.edit-obj.is-selected { outline: 2px solid #2f6fed; }
.edit-obj img { width: 100%; height: 100%; object-fit: contain; pointer-events: none; user-select: none; }
.edit-obj.is-whiteout { background: #fff; outline-color: #c9cdd6; }
.edit-obj.is-highlight { background: rgba(255, 235, 59, .4); }
.edit-text { min-height: 100%; font-family: Helvetica, Arial, sans-serif; font-size: calc(var(--fs, 14) * var(--k, 1) * 1px); line-height: 1.25; white-space: pre-wrap; outline: none; cursor: text; overflow-wrap: anywhere; }
.edit-text:empty::before { content: "…"; opacity: .4; }
.edit-del { position: absolute; top: -12px; inset-inline-end: -12px; width: 24px; height: 24px; border-radius: 12px; border: 0; background: var(--danger); color: #fff; font-size: 12px; line-height: 24px; cursor: pointer; display: none; }
.edit-resize { position: absolute; right: -7px; bottom: -7px; width: 14px; height: 14px; border-radius: 4px; background: #2f6fed; cursor: nwse-resize; display: none; }
.edit-obj.is-selected .edit-del, .edit-obj.is-selected .edit-resize { display: block; }
.edit-actions { position: sticky; bottom: 0; z-index: 5; margin-top: var(--space-5); padding: var(--space-3) 0 calc(var(--space-3) + env(safe-area-inset-bottom, 0px)); background: linear-gradient(transparent, var(--paper) 30%); }

.sig-dialog { width: min(640px, calc(100vw - 32px)); border: 0; border-radius: var(--radius-lg); padding: var(--space-5); background: var(--paper); color: var(--ink); box-shadow: 0 24px 64px rgba(0,0,0,.3); }
.sig-dialog::backdrop { background: rgba(10, 12, 20, .55); }
.sig-title { font-size: 1.25rem; margin: 0 0 var(--space-3); }
.sig-tabs { display: flex; gap: var(--space-2); margin-bottom: var(--space-3); }
.sig-tab { flex: 1; padding: 10px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--paper); color: var(--ink); font: inherit; font-weight: 600; cursor: pointer; }
.sig-tab[aria-selected="true"] { border-color: var(--cat, var(--accent)); background: var(--cat-soft, var(--accent-soft)); }
.sig-pane { display: grid; gap: var(--space-2); justify-items: start; }
.sig-canvas { width: 100%; aspect-ratio: 3 / 1; background: #fff; border: 1px dashed #b8bdc9; border-radius: var(--radius-sm); touch-action: none; }
.sig-input { width: 100%; }
.sig-inks { display: flex; gap: var(--space-2); margin: var(--space-3) 0; }
.sig-ink { width: 30px; height: 30px; border-radius: 15px; border: 3px solid transparent; cursor: pointer; }
.sig-ink[data-ink="black"] { background: #111; } .sig-ink[data-ink="blue"] { background: #1b3fa8; }
.sig-ink[aria-pressed="true"] { border-color: var(--cat, var(--accent)); box-shadow: 0 0 0 2px var(--paper) inset; }
.faq-list { display: grid; gap: var(--space-2); margin-bottom: var(--space-6); }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: var(--space-3) var(--space-4); background: var(--paper); }
.faq-item summary { cursor: pointer; font-weight: 700; color: var(--ink); list-style: none; display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: ""; flex: none; width: 9px; height: 9px; border-right: 2.5px solid currentColor; border-bottom: 2.5px solid currentColor; transform: rotate(45deg) translateY(-3px); transition: transform .2s ease; opacity: .6; }
.faq-item[open] summary::after { transform: rotate(225deg) translate(-2px, -2px); }
.faq-item summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; border-radius: 4px; }
.app-faq { margin-top: var(--space-6); text-align: start; }
.app-faq h2 { font-size: 1.25rem; margin: 0 0 var(--space-3); }
@media (prefers-reduced-motion: reduce) { .faq-item summary::after { transition: none; } }
.faq-item p { margin-top: var(--space-2); color: var(--slate); }