/* ═══════════════════════════════════════════
   Flash Transfer — Design System
   ═══════════════════════════════════════════ */

/* ── Variables ── */
:root {
  --bg:          #09090b;
  --surface:     #18181b;
  --surface-2:   #27272a;
  --border:      #3f3f46;
  --border-soft: #2a2a35;
  --primary:     #f59e0b;
  --primary-d:   #d97706;
  --primary-glow:rgba(245,158,11,.18);
  --blue:        #60a5fa;
  --text:        #fafafa;
  --muted:       #a1a1aa;
  --success:     #4ade80;
  --error-c:     #f87171;
  --radius:      12px;
  --radius-lg:   20px;
  --ease:        0.2s ease;
  --max-w:       1200px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; }
body  {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; }
img, svg { display: block; }

/* ── Container ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ═══════════════════════════════════════════
   COMPONENTS
   ═══════════════════════════════════════════ */

/* ── Buttons ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary);
  color: #000;
  font-weight: 700; font-size: .9rem;
  padding: 12px 24px;
  border: none; border-radius: 10px;
  transition: all var(--ease);
}
.btn-primary:hover {
  background: var(--primary-d);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--primary-glow);
}
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent;
  color: var(--text);
  font-weight: 600; font-size: .9rem;
  padding: 12px 22px;
  border: 1px solid var(--border); border-radius: 10px;
  transition: all var(--ease);
}
.btn-ghost:hover { background: var(--surface); border-color: var(--muted); }

.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent;
  color: var(--muted);
  font-weight: 500; font-size: .875rem;
  padding: 10px 20px;
  border: 1px solid var(--border); border-radius: 8px;
  transition: all var(--ease);
}
.btn-outline:hover { color: var(--text); border-color: var(--muted); }

.btn-full { width: 100%; justify-content: center; padding: 14px; font-size: 1rem; }

.btn-back {
  background: none; border: none;
  color: var(--muted); font-size: .875rem;
  margin-top: 20px; padding: 8px 0;
  display: block;
  transition: color var(--ease);
}
.btn-back:hover { color: var(--text); }

/* ── Gradient text ── */
.gradient-text {
  background: linear-gradient(130deg, #f59e0b 0%, #fbbf24 50%, #fde68a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Section layout ── */
.section { padding: 88px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 10px;
}
.section-head p { color: var(--muted); font-size: 1.05rem; }

/* ═══════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════ */
.navbar {
  position: sticky; top: 0; z-index: 200;
  background: rgba(9,9,11,.85);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
}
.nav-brand {
  display: flex; align-items: center; gap: 8px;
  font-weight: 800; font-size: 1.1rem; letter-spacing: -.01em;
}
.bolt { font-size: 1.25em; }
.nav-menu { display: flex; align-items: center; gap: 32px; }
.nav-link { color: var(--muted); font-size: .9rem; font-weight: 500; transition: color var(--ease); }
.nav-link:hover { color: var(--text); }
.nav-cta {
  background: var(--primary); color: #000;
  font-weight: 700; font-size: .875rem;
  padding: 8px 18px; border-radius: 8px;
  transition: background var(--ease);
}
.nav-cta:hover { background: var(--primary-d); }
.nav-back-link { color: var(--muted); font-size: .875rem; transition: color var(--ease); }
.nav-back-link:hover { color: var(--text); }

/* Hamburger */
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; padding: 6px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: all var(--ease);
}

/* ═══════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════ */
.hero {
  position: relative;
  overflow: hidden;
  padding: 90px 0 80px;
}
.hero-glow {
  position: absolute; top: -240px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 700px;
  background: radial-gradient(ellipse, rgba(245,158,11,.07) 0%, transparent 65%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(245,158,11,.1);
  border: 1px solid rgba(245,158,11,.3);
  color: var(--primary);
  font-size: .78rem; font-weight: 600;
  padding: 6px 13px; border-radius: 20px;
  margin-bottom: 22px;
}
.badge-dot {
  width: 7px; height: 7px;
  background: var(--primary); border-radius: 50%;
  animation: dot-pulse 2s ease-in-out infinite;
}
@keyframes dot-pulse { 0%,100%{opacity:1} 50%{opacity:.35} }

.hero-title {
  font-size: clamp(2.3rem, 4.5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.1; letter-spacing: -.025em;
  margin-bottom: 18px;
}
.hero-sub {
  color: var(--muted); font-size: 1.05rem; line-height: 1.75;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ── Mock Transfer Visual ── */
.hero-visual { display: flex; justify-content: flex-end; }
.mock-wrap {
  display: flex; align-items: center; gap: 12px;
  filter: drop-shadow(0 24px 64px rgba(0,0,0,.6));
}
.mock-device {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 175px;
  overflow: hidden;
}
.mock-device.receiver { opacity: 0; animation: fade-recv 0.5s ease 2.6s forwards; }
@keyframes fade-recv { to { opacity: 1; } }

.mock-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 7px 10px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  font-size: .6rem; color: var(--muted);
}
.mock-dots { display: flex; gap: 4px; }
.mock-dots i {
  display: block; width: 7px; height: 7px;
  border-radius: 50%; background: var(--border);
}
.mock-bar span { flex: 1; text-align: center; }
.mock-body { padding: 10px; }
.mock-file {
  display: flex; align-items: center; gap: 7px;
  background: var(--surface-2); border-radius: 6px;
  padding: 7px; margin-bottom: 8px;
}
.mock-file-icon { font-size: 1.15rem; }
.mock-file-name { font-size: .58rem; font-weight: 700; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 88px; }
.mock-file-size { font-size: .52rem; color: var(--muted); }
.mock-code { font-size: .58rem; color: var(--muted); text-align: center; margin-bottom: 7px; }
.mock-code b { color: var(--primary); font-size: .72rem; letter-spacing: 2px; }
.mock-prog-wrap { height: 4px; background: var(--surface-2); border-radius: 2px; overflow: hidden; margin-bottom: 6px; }
.mock-prog-bar { height: 100%; background: var(--primary); border-radius: 2px; width: 0; animation: prog-grow 2s ease-in-out 0.4s forwards; }
@keyframes prog-grow { 0%{width:0} 80%{width:100%} 100%{width:100%} }
.mock-sent { font-size: .58rem; color: var(--success); text-align: center; opacity: 0; animation: fade-recv 0.4s ease 2.2s forwards; }

.mock-connector {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.mock-bolt-anim { font-size: 1.4rem; animation: bolt-anim 1.2s ease infinite; }
@keyframes bolt-anim { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-5px)} }
.mock-line { width: 2px; height: 36px; background: linear-gradient(to bottom, transparent, var(--primary), transparent); }

.mock-recv-file { display: flex; align-items: center; gap: 7px; animation: fade-recv 0.5s ease 2.8s both; opacity: 0; }
.mock-recv-ok { font-size: .58rem; color: var(--success); }

/* ═══════════════════════════════════════════
   FEATURES
   ═══════════════════════════════════════════ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: all var(--ease);
}
.feat-card:hover {
  border-color: rgba(245,158,11,.35);
  transform: translateY(-3px);
  box-shadow: 0 10px 36px rgba(0,0,0,.3);
}
.feat-icon { font-size: 2rem; margin-bottom: 14px; }
.feat-card h3 { font-size: .95rem; font-weight: 700; margin-bottom: 8px; }
.feat-card p  { font-size: .84rem; color: var(--muted); line-height: 1.65; }

/* ═══════════════════════════════════════════
   HOW IT WORKS
   ═══════════════════════════════════════════ */
.steps { display: flex; align-items: flex-start; justify-content: center; }
.step { text-align: center; max-width: 270px; padding: 0 20px; }
.step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--primary); color: #000;
  font-size: 1.2rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px;
}
.step h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.step p  { font-size: .84rem; color: var(--muted); }
.step-line { flex: 1; height: 2px; background: var(--border); margin-top: 24px; max-width: 80px; }

/* ═══════════════════════════════════════════
   WEB SECTION
   ═══════════════════════════════════════════ */
.web-section { background: linear-gradient(135deg, rgba(245,158,11,.03) 0%, transparent 60%); }
.web-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.web-badge {
  display: inline-block;
  background: rgba(96,165,250,.1); border: 1px solid rgba(96,165,250,.3);
  color: var(--blue); font-size: .78rem; font-weight: 600;
  padding: 5px 12px; border-radius: 20px; margin-bottom: 18px;
}
.web-text h2 { font-size: clamp(1.5rem,2.5vw,2rem); font-weight: 800; letter-spacing:-.02em; margin-bottom: 14px; }
.web-text p  { color: var(--muted); line-height: 1.75; margin-bottom: 20px; }
.web-note    { color: var(--muted); font-size: .8rem; margin-bottom: 26px; margin-top: -10px; }

.type-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.type-pills span {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 6px; padding: 4px 10px; font-size: .8rem; font-weight: 500;
}

/* Web card */
.web-card-wrap { display: flex; justify-content: flex-end; }
.web-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px; width: 300px;
  box-shadow: 0 24px 72px rgba(0,0,0,.5);
}
.web-card-label { font-size: .75rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 18px; }
.web-code-box { background: var(--surface-2); border-radius: 10px; padding: 16px; margin-bottom: 14px; }
.web-code-hint { font-size: .68rem; color: var(--muted); display: block; margin-bottom: 4px; }
.web-code-val { font-size: 2.2rem; font-weight: 900; letter-spacing: 6px; color: var(--primary); display: block; }
.web-file-row { font-size: .82rem; color: var(--muted); margin-bottom: 12px; }
.web-prog-wrap { height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden; margin-bottom: 10px; }
.web-prog-fill { height: 100%; background: var(--primary); border-radius: 3px; animation: prog-grow 3s ease-in-out infinite; }
.web-done { font-size: .8rem; color: var(--success); }

/* ═══════════════════════════════════════════
   DOWNLOAD
   ═══════════════════════════════════════════ */
.download-section { text-align: center; }
.dl-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 22px; max-width: 760px; margin: 0 auto 36px;
}
.dl-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px 20px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  transition: all var(--ease);
}
.dl-card:hover {
  border-color: rgba(245,158,11,.4);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,.4);
}
.dl-icon { font-size: 2.4rem; }
.dl-card h3 { font-size: 1rem; font-weight: 700; }
.dl-card p  { font-size: .8rem; color: var(--muted); }
.dl-ext { font-size: .72rem; background: var(--surface-2); border: 1px solid var(--border); border-radius: 4px; padding: 3px 8px; font-family: monospace; color: var(--muted); }
.gh-link { text-align: center; }

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */
.footer { border-top: 1px solid var(--border); padding: 40px 0 20px; }
.footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 28px;
}
.footer-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: .875rem; color: var(--muted); transition: color var(--ease); }
.footer-links a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 20px; text-align: center; }
.footer-bottom p { font-size: .78rem; color: var(--muted); }

/* ═══════════════════════════════════════════
   TRANSFER PAGE
   ═══════════════════════════════════════════ */
.t-body { min-height: 100vh; }
.t-main {
  min-height: calc(100vh - 64px);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 48px 24px 80px;
}
.t-screen {
  display: none;
  width: 100%; max-width: 520px;
  flex-direction: column; align-items: center;
}
.t-screen.active { display: flex; }

.t-header {
  text-align: center;
  margin-bottom: 28px;
}
.t-header h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -.02em; margin-bottom: 8px; }
.t-header p  { color: var(--muted); font-size: .95rem; margin-bottom: 14px; }

.type-info { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 6px; }
.type-info-label { font-size: .78rem; color: var(--muted); }
.type-chip {
  background: var(--surface-2); border: 1px solid var(--border);
  font-size: .72rem; font-weight: 600;
  padding: 2px 8px; border-radius: 4px;
}
.type-limit { font-size: .72rem; color: var(--muted); }

/* Mode cards */
.mode-cards {
  display: flex; flex-direction: column; align-items: stretch;
  gap: 14px; width: 100%;
}
.mode-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  text-align: center;
  transition: all var(--ease);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.mode-card:hover {
  border-color: rgba(245,158,11,.45);
  background: rgba(245,158,11,.04);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px rgba(0,0,0,.3);
}
.mode-card-icon { font-size: 2.4rem; }
.mode-card h2   { font-size: 1.2rem; font-weight: 800; }
.mode-card p    { font-size: .85rem; color: var(--muted); line-height: 1.5; }
.mode-section-title {
  font-size: .78rem; font-weight: 700; color: var(--muted);
  text-transform: uppercase; letter-spacing: .07em;
  margin-bottom: -4px;
}
.mode-or {
  text-align: center; color: var(--muted);
  font-size: .85rem; padding: 14px 0;
}

/* Transfer card */
.t-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  width: 100%;
  display: flex; flex-direction: column; gap: 28px;
}

.t-step { display: flex; flex-direction: column; gap: 14px; }
.t-step + .t-step {
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.t-step-label { font-size: .78rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }

/* Code display (sender) */
.code-display {
  background: var(--surface-2); border-radius: 12px;
  padding: 20px; text-align: center;
  display: flex; align-items: center; justify-content: center; min-height: 72px;
}
.code-chars {
  font-size: 2.6rem; font-weight: 900;
  letter-spacing: 10px; color: var(--primary);
  font-variant-numeric: tabular-nums;
}
.code-spinner {
  width: 24px; height: 24px;
  border: 2px solid var(--border); border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.t-status { font-size: .84rem; color: var(--muted); text-align: center; }

/* QR code canvas (sender) */
.qr-canvas {
  display: block; margin: 8px auto;
  width: 160px; height: 160px;
  border: 3px solid var(--primary);
  border-radius: 10px;
  image-rendering: pixelated;
  background: #fff;
  box-shadow: 0 0 20px rgba(255,215,0,.2);
}

/* QR divider */
.qr-divider {
  display: flex; align-items: center; gap: 8px;
  color: var(--muted); font-size: .78rem; margin: 2px 0;
}
.qr-divider::before, .qr-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* QR scanner button */
.btn-scan-qr {
  width: 100%; padding: 10px; border-radius: var(--radius-sm);
  background: transparent; border: 1.5px solid var(--primary);
  color: var(--primary); font-size: .88rem; font-weight: 600;
  cursor: pointer; transition: background var(--ease);
}
.btn-scan-qr:hover { background: rgba(255,215,0,.08); }

/* QR scanner video wrapper */
.qr-scanner-wrap {
  display: flex; flex-direction: column; gap: 8px; align-items: center;
}
#qrVideo {
  width: 100%; border-radius: 10px;
  border: 2px solid var(--primary);
  background: #000; aspect-ratio: 4/3; object-fit: cover;
}
.btn-stop-scan {
  width: 100%; padding: 8px; border-radius: var(--radius-sm);
  background: transparent; border: 1px solid var(--danger, #f85149);
  color: var(--danger, #f85149); font-size: .84rem; cursor: pointer;
  transition: background var(--ease);
}
.btn-stop-scan:hover { background: rgba(248,81,73,.1); }

/* Dropzone */
.dropzone {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  transition: all var(--ease);
  overflow: hidden;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--primary); background: rgba(245,158,11,.04); }
.dropzone input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer; z-index: 1;
}
.dz-content {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 28px 20px;
  pointer-events: none;
}
.dz-icon { font-size: 2rem; }
.dz-text { font-size: .9rem; font-weight: 600; }
.dz-or   { font-size: .8rem; color: var(--muted); }
.dz-content .btn-primary { pointer-events: all; }

/* File list spacing */
.file-list { margin-top: 4px; }

/* File preview */
.file-preview {
  display: none;
  align-items: center; gap: 10px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px;
}
.file-prev-icon { font-size: 1.5rem; }
.file-prev-info { flex: 1; min-width: 0; }
.file-prev-name { font-size: .88rem; font-weight: 600; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-prev-size { font-size: .75rem; color: var(--muted); }
.file-remove-btn {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--muted); font-size: .8rem;
  padding: 4px 8px; border-radius: 6px;
  transition: all var(--ease);
}
.file-remove-btn:hover { color: var(--error-c); border-color: var(--error-c); }

/* Errors */
.t-error {
  display: none;
  font-size: .82rem; color: var(--error-c);
  background: rgba(248,113,113,.1); border: 1px solid rgba(248,113,113,.25);
  border-radius: 8px; padding: 10px 14px;
}
.t-error.show { display: block; }

/* Progress block */
.progress-block {
  display: none;
  flex-direction: column; gap: 8px;
}
.progress-block.show { display: flex; }
.prog-info { display: flex; justify-content: space-between; align-items: center; font-size: .84rem; }
.prog-track { height: 8px; background: var(--surface-2); border-radius: 4px; overflow: hidden; }
.prog-fill { height: 100%; background: linear-gradient(90deg, var(--primary-d), var(--primary)); border-radius: 4px; width: 0; transition: width .3s ease; }
.prog-sub { font-size: .75rem; color: var(--muted); }

/* Code input (receiver) */
.code-input-row { display: flex; gap: 10px; }
.code-input {
  flex: 1;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text); font-family: inherit;
  font-size: 1.5rem; font-weight: 800; letter-spacing: 6px;
  text-align: center; text-transform: uppercase;
  padding: 12px 16px; border-radius: 10px;
  transition: border-color var(--ease);
  outline: none;
}
.code-input::placeholder { color: var(--border); letter-spacing: 4px; font-size: 1.2rem; }
.code-input:focus { border-color: var(--primary); }

/* Receive status */
.recv-status {
  display: none;
  flex-direction: column; align-items: center; gap: 12px;
  padding: 24px 0; text-align: center;
}
.recv-status.show { display: flex; }
.recv-status-icon { font-size: 2.4rem; animation: bolt-anim 1.2s ease infinite; }
.recv-status p { color: var(--muted); font-size: .9rem; }

/* Done */
.done-block {
  display: none;
  flex-direction: column; align-items: center; gap: 12px;
  text-align: center; padding: 12px 0;
}
.done-block.show { display: flex; }
.done-icon { font-size: 3rem; animation: done-pop .4s cubic-bezier(.22,.61,.36,1) both; }
@keyframes done-pop { from{transform:scale(.6);opacity:0} to{transform:scale(1);opacity:1} }
.done-name { font-size: 1.05rem; font-weight: 700; }
.done-hint { font-size: .82rem; color: var(--muted); }

/* Toast */
.toast {
  display: none;
  position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%);
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text); font-size: .875rem; font-weight: 500;
  padding: 12px 22px; border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,.5);
  z-index: 9999;
  animation: toast-in .25s ease;
}
.toast.show { display: block; }
.toast-error   { border-color: rgba(248,113,113,.4); }
.toast-ok,
.toast-success { border-color: rgba(74,222,128,.4); }
@keyframes toast-in { from{transform:translateX(-50%) translateY(12px);opacity:0} to{transform:translateX(-50%) translateY(0);opacity:1} }

/* ═══════════════════════════════════════════
   FILE LIST (send side — multi-file)
   ═══════════════════════════════════════════ */
.file-list { display: flex; flex-direction: column; gap: 6px; }
.file-list-item {
  display: flex; align-items: center; gap: 10px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 14px;
}
.file-list-icon { font-size: 1.3rem; flex-shrink: 0; }
.file-list-info { flex: 1; min-width: 0; }
.file-list-name {
  display: block; font-size: .88rem; font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.file-list-size { font-size: .75rem; color: var(--muted); }

/* ═══════════════════════════════════════════
   GALLERY (receive side)
   ═══════════════════════════════════════════ */
.gallery-header {
  font-size: 1.05rem; font-weight: 700;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}
.gallery-item {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px;
  display: flex; flex-direction: column; gap: 10px;
}
#galleryList { display: flex; flex-direction: column; gap: 8px; margin-bottom: 8px; }
.gallery-item-info { display: flex; align-items: center; gap: 10px; }
.gallery-item-icon { font-size: 1.6rem; flex-shrink: 0; }
.gallery-item-meta { flex: 1; min-width: 0; }
.gallery-item-name {
  display: block; font-size: .9rem; font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.gallery-item-size { font-size: .75rem; color: var(--muted); }
.gallery-item-btns { display: flex; flex-wrap: wrap; gap: 6px; }

/* Gallery action buttons */
.btn-ga {
  padding: 6px 12px; border-radius: 7px; font-size: .8rem; font-weight: 600;
  cursor: pointer; transition: all var(--ease);
  border: 1.5px solid var(--border);
  background: var(--surface); color: var(--text);
}
.btn-ga:hover { border-color: var(--primary); color: var(--primary); }
.btn-dl  { border-color: rgba(245,158,11,.4); color: var(--primary); }
.btn-dl:hover  { background: rgba(245,158,11,.08); }
.btn-prev:hover { background: rgba(99,179,237,.08); border-color: rgba(99,179,237,.5); color: #63b3ed; }
.btn-prn:hover  { background: rgba(74,222,128,.08); border-color: rgba(74,222,128,.4);  color: #4ade80; }

/* Inline file preview */
.gallery-preview {
  border-top: 1px solid var(--border); padding-top: 10px;
}
.preview-img {
  display: block; max-width: 100%; max-height: 420px;
  margin: 0 auto; border-radius: 8px;
  object-fit: contain;
}
.preview-pdf {
  display: block; width: 100%; height: 480px;
  border: none; border-radius: 8px;
  background: #fff;
}
.preview-video {
  display: block; max-width: 100%; max-height: 480px;
  margin: 0 auto; border-radius: 8px;
  background: #000;
}
.preview-text {
  font-family: 'Courier New', monospace; font-size: .8rem;
  color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; margin: 0;
  max-height: 320px; overflow: auto;
  white-space: pre-wrap; word-break: break-word;
}

/* ═══════════════════════════════════════════
   CONNECTION ACTION GRID
   ═══════════════════════════════════════════ */
/* Code toujours visible + bouton copier */
.code-always-row {
  display: flex; align-items: center; gap: 10px;
}
.code-always-row .code-display {
  flex: 1;
}
.btn-copy-code {
  flex-shrink: 0;
  width: 44px; height: 44px;
  background: var(--surface-2); border: 1.5px solid var(--border);
  border-radius: 10px; color: var(--muted);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all var(--ease);
}
.btn-copy-code:not(:disabled):hover {
  border-color: var(--primary); color: var(--primary);
  background: rgba(245,158,11,.08);
}
.btn-copy-code:disabled { opacity: .35; cursor: default; }

.conn-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.conn-actions-3 {
  grid-template-columns: 1fr 1fr 1fr;
}
.conn-action-btn {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 6px; padding: 14px 10px;
  background: var(--surface-2); border: 1.5px solid var(--border);
  border-radius: var(--radius); color: var(--text);
  font-size: .82rem; font-weight: 600; cursor: pointer;
  transition: all var(--ease); text-align: center;
}
.btn-action-icon { font-size: 1.4rem; }
.conn-action-btn:hover {
  border-color: var(--primary); color: var(--primary);
  background: rgba(245,158,11,.06);
}
.conn-action-btn.active {
  border-color: var(--primary); background: rgba(245,158,11,.1);
  color: var(--primary);
}
.conn-panel { display: none; margin-top: 14px; }
#qrVideo, #recvQrVideo {
  width: 100%; border-radius: 10px;
  border: 2px solid var(--primary);
  background: #000; aspect-ratio: 4/3; object-fit: cover;
}

/* ═══════════════════════════════════════════
   RELAY / DESKTOP MODE
   ═══════════════════════════════════════════ */
.mode-card-desktop {
  border-color: rgba(96,165,250,.3);
  background: rgba(96,165,250,.04);
}
.mode-card-desktop:hover {
  border-color: rgba(96,165,250,.6);
  background: rgba(96,165,250,.08);
  box-shadow: 0 10px 40px rgba(96,165,250,.1);
}
.mode-card-desktop h2 { color: var(--blue); }

.relay-badge-hint {
  display: inline-block;
  background: rgba(96,165,250,.1);
  border: 1px solid rgba(96,165,250,.3);
  color: var(--blue);
  font-size: .72rem; font-weight: 600;
  padding: 3px 10px; border-radius: 12px;
  margin-top: 4px;
}

.relay-hint-box {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: .84rem;
  color: var(--muted);
  line-height: 1.6;
}
.relay-hint-box strong {
  color: var(--text);
}

.code-chars-lower {
  text-transform: none;
  letter-spacing: 8px;
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 1100px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 50px; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-visual { display: none; }
  .web-grid { grid-template-columns: 1fr; }
  .web-card-wrap { display: none; }
}
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--surface); border-bottom: 1px solid var(--border);
    padding: 20px 24px; gap: 18px;
  }
  .nav-menu.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-back-link { display: block; }

  .features-grid { grid-template-columns: 1fr; }
  .steps { flex-direction: column; align-items: center; }
  .step-line { display: none; }
  .dl-grid { grid-template-columns: 1fr; max-width: 280px; }
  .footer-inner { flex-direction: column; gap: 20px; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }

  .t-main { padding: 28px 16px 60px; }
  .mode-cards { flex-direction: column; }
  .code-input-row { flex-direction: column; }
}
@media (max-width: 480px) {
  .code-chars { font-size: 2rem; letter-spacing: 7px; }
}

/* ═══════════════════════════════════════════
   NOUVEAU DESIGN — W/T codes + UX améliorée
   ═══════════════════════════════════════════ */

/* ── Hero mode selection ── */
.t-hero {
  text-align: center;
  margin-bottom: 36px;
}
.t-hero-icon { font-size: 2.8rem; margin-bottom: 8px; }
.t-hero-title {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 800; letter-spacing: -.02em;
  margin-bottom: 10px;
}
.t-hero-sub {
  color: var(--muted); font-size: .95rem; margin-bottom: 14px;
}
.t-hero-compat {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; font-size: .82rem; color: var(--muted);
}

/* ── Badges de type de code ── */
.t-code-badge {
  display: inline-flex; align-items: center;
  font-size: .72rem; font-weight: 700;
  padding: 3px 9px; border-radius: 6px;
  letter-spacing: .02em; white-space: nowrap;
}
.t-code-w {
  background: rgba(245,158,11,.12);
  border: 1px solid rgba(245,158,11,.35);
  color: var(--primary);
}
.t-code-t {
  background: rgba(96,165,250,.1);
  border: 1px solid rgba(96,165,250,.3);
  color: var(--blue);
}

/* ── Mode cards horizontal ── */
.mode-cards-2 { gap: 12px; }
.mode-card-h {
  flex-direction: row !important;
  text-align: left !important;
  padding: 22px 24px !important;
  gap: 16px !important;
}
.mode-card-h .mode-card-icon { font-size: 1.8rem; flex-shrink: 0; }
.mode-card-body { flex: 1; }
.mode-card-body h2 { font-size: 1.05rem; margin-bottom: 3px; }
.mode-card-body p  { font-size: .82rem; }
.mode-card-arrow {
  font-size: 1.2rem; color: var(--muted);
  flex-shrink: 0; transition: transform var(--ease), color var(--ease);
}
.mode-card-h:hover .mode-card-arrow { color: var(--primary); transform: translateX(4px); }

/* ── Panel header (titre + badge) ── */
.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-bottom: 4px;
}
.panel-title { font-size: .88rem; font-weight: 700; }
.file-count-badge {
  background: rgba(245,158,11,.15); border: 1px solid rgba(245,158,11,.3);
  color: var(--primary); font-size: .7rem; font-weight: 700;
  padding: 2px 9px; border-radius: 20px;
}

/* ── Lettre de préfixe dans le code ── */
.code-prefix-letter {
  color: var(--primary); opacity: .7;
  margin-right: 2px;
}

/* ── Écran d'envoi : deux colonnes ── */
#screenSend.t-screen-wide {
  max-width: 960px;
}
.send-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
  width: 100%;
}
.send-card {
  gap: 18px !important;
}
@media (max-width: 720px) {
  .send-layout { grid-template-columns: 1fr; }
  #screenSend.t-screen-wide { max-width: 520px; }
}

/* ── Bouton envoyer plus visible ── */
.btn-send-action {
  font-size: 1.05rem !important;
  padding: 16px !important;
}

/* ── Section réception ── */
.recv-your-code {
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
  margin-bottom: 0;
}

/* ── Rangée QR/Scanner sur la réception ── */
.recv-qr-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

/* ── Diviseur "ou entrez un code" ── */
.recv-or-divider {
  display: flex; align-items: center; gap: 10px;
  color: var(--muted); font-size: .78rem;
  padding: 18px 0 14px;
}
.recv-or-divider::before,
.recv-or-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.recv-or-divider span { white-space: nowrap; }

/* ── Input code : accepte 7 chars (W/T + 6) ── */
.code-input { max-width: 100%; }