:root {
  --bg: #0E0E10;
  --bg-raised: #17171A;
  --ink: #EDEAE3;
  --ink-dim: #9C9A94;
  --accent: #F5C94B;
  --accent-dim: #8A7433;
  --teal: #1B4B4A;
  --teal-bright: #2E7A78;
  --error: #C24C3D;
  --success: #7FA37A;
  --border: #2A2A2E;

  --font-display: 'Fraunces', serif;
  --font-bangla: 'Tiro Bangla', serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 1;
  opacity: 0.035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; }
code { font-family: var(--font-mono); background: var(--bg-raised); padding: 0.1em 0.4em; border-radius: 3px; font-size: 0.9em; }

/* ---------- nav ---------- */
.nav {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 28px 6vw 0; position: relative; z-index: 2;
}
.nav-mark { font-family: var(--font-bangla); font-size: 1.4rem; color: var(--accent); }
.nav-mark-sub { font-family: var(--font-mono); font-size: 0.65rem; color: var(--ink-dim); margin-left: 8px; letter-spacing: 0.02em; }
.nav-tag { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ink-dim); }

main { position: relative; z-index: 2; max-width: 1100px; margin: 0 auto; padding: 0 6vw; }

.eyebrow {
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent);
  letter-spacing: 0.03em; margin: 0 0 18px;
}

/* ---------- hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px;
  align-items: center; padding: 64px 0 80px;
}
.hero h1 {
  font-family: var(--font-display); font-weight: 400; font-size: clamp(2.4rem, 4vw, 3.6rem);
  line-height: 1.08; margin: 0 0 22px; letter-spacing: -0.01em;
}
.hero h1 em { font-style: italic; color: var(--accent); }
.hero-sub { font-size: 1.05rem; line-height: 1.6; color: var(--ink-dim); max-width: 46ch; }

.frame-mock {
  border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
  background: #050506;
}
.frame-inner {
  position: relative; aspect-ratio: 16/10; overflow: hidden;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(46,122,120,0.25), transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(245,201,75,0.08), transparent 55%),
    #0a0a0c;
}
.frame-scan {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(0deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 3px);
}
.caption-bar {
  position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,0.72); padding: 8px 18px; border-radius: 4px;
  max-width: 88%; text-align: center;
}
.caption-bar span {
  font-family: var(--font-bangla); font-size: 1.05rem; color: #fff;
  animation: captionFade 4s ease-in-out infinite;
}
@keyframes captionFade {
  0%, 100% { opacity: 0; transform: translateY(4px); }
  10%, 85% { opacity: 1; transform: translateY(0); }
  95% { opacity: 0; transform: translateY(-4px); }
}
.frame-label {
  font-family: var(--font-mono); font-size: 0.68rem; color: var(--ink-dim);
  padding: 10px 14px; border-top: 1px solid var(--border);
}

/* ---------- upload ---------- */
.upload-section { padding: 20px 0 90px; }

.dropzone {
  border: 1.5px dashed var(--border); border-radius: 10px;
  padding: 56px 24px; text-align: center; cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent-dim); background: rgba(245,201,75,0.03); }
.dropzone:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.dropzone.drag-over { border-color: var(--accent); background: rgba(245,201,75,0.06); }

.dropzone-inner { color: var(--ink-dim); }
.dropzone-inner svg { color: var(--accent); margin-bottom: 14px; }
.dropzone-title { font-family: var(--font-display); font-size: 1.3rem; color: var(--ink); margin: 0 0 6px; }
.dropzone-sub { font-size: 0.88rem; margin: 0; }

.filebar {
  margin-top: 20px; display: flex; align-items: center; justify-content: space-between;
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 18px;
}
.filebar span { font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-dim); }

.btn-primary {
  font-family: var(--font-body); font-weight: 600; font-size: 0.9rem;
  background: var(--accent); color: #1a1608; border: none; border-radius: 6px;
  padding: 11px 22px; cursor: pointer; text-decoration: none; display: inline-block;
  transition: transform 0.12s ease, background 0.2s ease;
}
.btn-primary:hover { background: #f7d366; transform: translateY(-1px); }
.btn-primary:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

.btn-ghost {
  font-family: var(--font-body); font-size: 0.88rem; color: var(--ink-dim);
  background: transparent; border: 1px solid var(--border); border-radius: 6px;
  padding: 10px 18px; cursor: pointer; margin-top: 14px;
}
.btn-ghost:hover { color: var(--ink); border-color: var(--ink-dim); }

/* ---------- processing (signature loading state) ---------- */
.processing-section { padding: 20px 0 90px; }

.proc-frame {
  border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
  background: #050506; margin-bottom: 36px;
}
.proc-inner {
  position: relative; aspect-ratio: 21/6; overflow: hidden;
  background: radial-gradient(ellipse at 50% 40%, rgba(46,122,120,0.22), transparent 65%), #0a0a0c;
}
.proc-scan {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 30%, rgba(245,201,75,0.06) 50%, transparent 70%);
  background-size: 200% 100%;
  animation: sweep 2.6s linear infinite;
}
@keyframes sweep { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.steps { list-style: none; padding: 0; margin: 0; max-width: 560px; }
.steps li {
  display: flex; align-items: center; gap: 14px; padding: 11px 0;
  border-bottom: 1px solid var(--border); font-size: 0.92rem; color: var(--ink-dim);
}
.steps li:last-child { border-bottom: none; }
.steps .dot {
  width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--border);
  flex-shrink: 0; transition: all 0.25s ease;
}
.steps li.active .dot { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 0 3px rgba(245,201,75,0.18); }
.steps li.done .dot { border-color: var(--success); background: var(--success); }
.steps li.active .step-label { color: var(--ink); }
.steps li.done .step-label { color: var(--ink-dim); text-decoration: line-through; text-decoration-color: var(--border); }
.step-label { flex: 1; }
.step-time { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-dim); }

.proc-note { font-size: 0.85rem; color: var(--ink-dim); margin-top: 28px; max-width: 52ch; }

/* ---------- result ---------- */
.result-section { padding: 20px 0 90px; }
.result-section h2 { font-family: var(--font-display); font-weight: 400; font-size: 2rem; margin: 0 0 28px; }

.result-card {
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 10px;
  padding: 28px; margin-bottom: 24px;
}
.result-meta { display: flex; gap: 40px; margin-bottom: 22px; flex-wrap: wrap; }
.meta-label { display: block; font-family: var(--font-mono); font-size: 0.7rem; color: var(--ink-dim); margin-bottom: 4px; }
.meta-val { display: block; font-size: 1.1rem; color: var(--ink); }

.srt-preview {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-dim);
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: 8px;
  padding: 18px; max-height: 260px; overflow-y: auto; white-space: pre-wrap;
}

/* ---------- error ---------- */
.error-section { padding: 60px 0; }
.error-msg { color: var(--error); font-size: 1rem; max-width: 50ch; }

/* ---------- footer ---------- */
.site-footer {
  position: relative; z-index: 2; text-align: center; padding: 30px 6vw 50px;
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-dim);
  border-top: 1px solid var(--border); margin-top: 40px;
}

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding: 40px 0 56px; }
  .nav { padding: 22px 5vw 0; }
  main { padding: 0 5vw; }
}