:root {
  --bg: #0b0e14;
  --bg-panel: #12161f;
  --bg-panel-2: #171c28;
  --border: #232838;
  --border-soft: #1a1f2c;
  --text: #e8e6df;
  --text-dim: #8b93a7;
  --text-faint: #5a6274;
  --brass: #c9a227;
  --brass-soft: #eccb6c;
  --verify: #4fb286;
  --danger: #d1554a;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'IBM Plex Sans', -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  position: relative;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  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: var(--brass-soft); }

/* ── Hero ─────────────────────────────────────────── */

.hero {
  position: relative;
  padding: 72px 24px 48px;
  text-align: center;
  background:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(201,162,39,0.10), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border-soft);
}

.hero-inner { max-width: 720px; margin: 0 auto; }

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.16em;
  color: var(--text);
}

.wordmark-icon {
  width: 30px;
  height: 30px;
  border-radius: 7px;
}

.tagline {
  margin: 20px auto 0;
  max-width: 460px;
  color: var(--text-dim);
  font-size: 15.5px;
}

.br-mobile { display: none; }

/* Signature element: the ZETA1.header.token anatomy strip */
.anatomy {
  margin: 40px auto 0;
  max-width: 560px;
}

.anatomy-row {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-panel);
}

.seg { padding: 12px 16px; }
.seg-dot { padding: 12px 2px; color: var(--text-faint); }

.seg-tag { color: var(--brass-soft); background: rgba(201,162,39,0.10); }
.seg-header { color: var(--text); background: rgba(232,230,223,0.04); }
.seg-token { color: var(--verify); background: rgba(79,178,134,0.08); }

.anatomy-labels {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-top: 10px;
  font-size: 11px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.lbl-tag { color: var(--brass-soft); opacity: 0.8; flex: 0 0 auto; }
.lbl-header { flex: 1; text-align: center; }
.lbl-token { color: var(--verify); opacity: 0.8; flex: 0 0 auto; text-align: right; }

/* ── App shell ────────────────────────────────────── */

.app {
  max-width: 640px;
  margin: 0 auto;
  padding: 40px 24px 8px;
  position: relative;
  z-index: 2;
}

.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-soft);
}

.tab {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-faint);
  padding: 10px 4px 12px;
  margin-right: 20px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  transition: color .15s;
}

.tab span {
  font-size: 10.5px;
  font-weight: 400;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tab:hover { color: var(--text-dim); }

.tab.active { color: var(--text); }
.tab.active span { color: var(--brass-soft); }
.tab.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--brass);
  border-radius: 2px;
}

.pane { display: none; }
.pane.active { display: block; animation: fade .2s ease; }

@keyframes fade {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

.hint {
  color: var(--text-dim);
  font-size: 13.5px;
  line-height: 1.55;
  margin: 0 0 20px;
}

h3 {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 12px;
  font-weight: 600;
}

hr {
  border: none;
  border-top: 1px solid var(--border-soft);
  margin: 28px 0;
}

/* ── Dropzones ────────────────────────────────────── */

.dropzone {
  border: 1.5px dashed var(--border);
  border-radius: 10px;
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  background: var(--bg-panel);
  transition: border-color .15s, background .15s;
  margin-bottom: 18px;
  outline-offset: 3px;
}

.dropzone.small { padding: 20px 10px; margin-bottom: 0; }

.dropzone:hover, .dropzone.dragover, .dropzone:focus-visible {
  border-color: var(--brass);
  background: rgba(201,162,39,0.05);
}

.dropzone.has-file {
  border-color: var(--verify);
  border-style: solid;
  background: rgba(79,178,134,0.05);
}

.dz-icon {
  font-family: var(--mono);
  font-size: 20px;
  color: var(--text-faint);
  margin-bottom: 8px;
}

.dropzone.has-file .dz-icon { color: var(--verify); }

.dz-label { font-size: 13px; color: var(--text-dim); word-break: break-all; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 18px;
}

/* ── Fields ───────────────────────────────────────── */

.field { display: block; margin-bottom: 18px; }

.field span {
  display: block;
  font-size: 11.5px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 7px;
}

.pw-wrap { display: flex; gap: 8px; }

input[type="password"], input[type="text"] {
  flex: 1;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 11px 13px;
  border-radius: 8px;
  font-size: 14px;
  font-family: var(--mono);
  outline: none;
  transition: border-color .15s;
  min-width: 0;
}

input[type="password"]:focus, input[type="text"]:focus { border-color: var(--brass); }

.pw-toggle {
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-faint);
  border-radius: 8px;
  padding: 0 14px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--sans);
  white-space: nowrap;
}

.pw-toggle:hover { color: var(--text); border-color: var(--brass); }

/* ── Buttons ──────────────────────────────────────── */

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 8px;
  font-family: var(--sans);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .1s, border-color .15s, background .15s;
}

.btn:hover { border-color: var(--brass); }
.btn:active { transform: scale(0.98); }

.btn.primary {
  background: var(--brass);
  border-color: var(--brass);
  color: #17130a;
}

.btn.primary:hover { background: var(--brass-soft); border-color: var(--brass-soft); }

/* ── Status ───────────────────────────────────────── */

.statusbar {
  margin-top: 28px;
  padding: 12px 16px;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  font-size: 12.5px;
  font-family: var(--mono);
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 10px;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-faint);
  flex-shrink: 0;
}

.dot.ok { background: var(--verify); }
.dot.err { background: var(--danger); }
.dot.busy { background: var(--brass); animation: pulse 1s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ── Footer ───────────────────────────────────────── */

.footer {
  max-width: 640px;
  margin: 40px auto 60px;
  padding: 0 24px;
  text-align: center;
}

.footer p {
  font-size: 12px;
  color: var(--text-faint);
}

/* ── Responsive ───────────────────────────────────── */

@media (max-width: 480px) {
  .hero { padding: 52px 16px 36px; }
  .br-mobile { display: block; }
  .two-col { grid-template-columns: 1fr; }
  .anatomy-row { font-size: 13px; }
  .anatomy-labels { display: none; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}