/* ==========================================================================
   DNanoVault — design tokens
   Vault-hardware palette: charcoal + brass + steel, not hacker-terminal neon.
   ========================================================================== */

:root {
  --ink: #14171d;
  --ink-raised: #191d24;
  --panel: #1d222a;
  --panel-raised: #262c36;
  --border: #333b47;
  --border-soft: #2a303a;

  --brass: #c79a56;
  --brass-bright: #e0b876;
  --brass-dim: #8a6b3b;

  --steel: #6e8ca0;
  --steel-bright: #8fb0c4;

  --paper: #e9e5da;
  --paper-dim: #cfc9ba;
  --muted: #8b93a0;

  --danger: #c0655a;
  --danger-dim: #4a2a26;
  --success: #7ba88f;
  --success-dim: #223229;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "IBM Plex Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Menlo, monospace;

  --shadow-deep: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
  color: var(--paper);
}

p { margin: 0; }

a { color: inherit; }

button {
  font-family: var(--font-body);
  cursor: pointer;
}

input, textarea, select {
  font-family: var(--font-body);
  color: var(--paper);
  background: var(--ink-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--brass);
}

input::placeholder, textarea::placeholder {
  color: var(--muted);
}

:focus-visible {
  outline: 2px solid var(--brass-bright);
  outline-offset: 2px;
}

.mono { font-family: var(--font-mono); }

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 11px 20px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform 0.1s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:active { transform: translateY(1px); }

.btn-brass {
  background: var(--brass);
  color: #1a1408;
  font-weight: 600;
}
.btn-brass:hover { background: var(--brass-bright); }
.btn-brass:disabled {
  background: var(--panel-raised);
  color: var(--muted);
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--paper);
}
.btn-ghost:hover { border-color: var(--brass-dim); background: var(--panel-raised); }

.btn-danger {
  background: var(--danger-dim);
  color: var(--danger);
  border-color: transparent;
}
.btn-danger:hover { background: #5c3530; }

.btn-block { width: 100%; }

/* --------------------------------------------------------------------
   Vault mark (nav brand + hero)
   -------------------------------------------------------------------- */

.vault-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--paper);
}

.vault-mark svg { flex-shrink: 0; }

/* --------------------------------------------------------------------
   Panels / plates
   -------------------------------------------------------------------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
}

.plate {
  background: linear-gradient(180deg, var(--panel-raised), var(--panel));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  position: relative;
}

.plate::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(255, 255, 255, 0.03);
  border-radius: calc(var(--radius-sm) - 2px);
  pointer-events: none;
}

/* --------------------------------------------------------------------
   Scroll / layout helpers
   -------------------------------------------------------------------- */

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 32px; }

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
}