/* ── DESIGN TOKENS ─────────────────────────────────────────────────────────── */
:root {
  --white:      #ffffff;
  --off:        #f7f5f0;
  --off2:       #f0ece4;
  --surface:    #faf9f7;
  --border:     rgba(0,0,0,0.09);
  --border-med: rgba(0,0,0,0.15);
  --gold:       #C47F0A;
  --gold2:      #E8960A;
  --gold-light: #fdf3e0;
  --gold-text:  #7a5000;
  --black:      #0f0f0f;
  --ink:        #1a1814;
  --muted:      #6b6560;
  --dim:        #b0a89e;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'DM Mono', monospace;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 4px rgba(0,0,0,0.07);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.10);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.14);

  --max-width: 1200px;
  --nav-height: 72px;
}

/* ── RESET ──────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }

/* ── TYPOGRAPHY ─────────────────────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--black);
}
h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1rem; }

/* ── LAYOUT UTILITIES ───────────────────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}
.section { padding: 5rem 0; }
.section--alt { background: var(--off); }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--gold);
}

/* ── BUTTONS ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.8rem 1.6rem;
  border: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gold);
  color: var(--black);
}
.btn-primary:hover { background: var(--gold2); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border-med);
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn-dark {
  background: var(--black);
  color: var(--white);
}
.btn-dark:hover { background: #2a2a2a; }
.btn:disabled { opacity: 0.38; cursor: not-allowed; pointer-events: none; transform: none; }

/* ── CARDS ──────────────────────────────────────────────────────────────────── */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 1.75rem;
  transition: box-shadow 0.2s;
}
.card:hover { box-shadow: var(--shadow-md); }
.card--gold-border { border-left: 3px solid var(--gold); }

/* ── GRID ───────────────────────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* ── COMPLIANCE BANNER ──────────────────────────────────────────────────────── */
.compliance-banner {
  background: var(--gold-light);
  border: 1px solid rgba(196,127,10,0.2);
  border-left: 3px solid var(--gold);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.compliance-banner p {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  color: var(--gold-text);
  margin: 0;
  line-height: 1.5;
}

/* ── RESULT PANEL (shared by demos) ────────────────────────────────────────── */
.result-panel {
  background: var(--off);
  border: 1px solid var(--border);
  padding: 1.5rem;
  display: none;
  margin-top: 1.5rem;
}
.result-panel.visible { display: block; }
.result-panel h4 {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
}
.result-content {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ink);
  white-space: pre-wrap;
}
.result-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}
.result-content th {
  background: var(--off2);
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-weight: 500;
  border-bottom: 2px solid var(--border-med);
}
.result-content td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
.result-meta {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--dim);
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

/* ── LOADING STATE ──────────────────────────────────────────────────────────── */
.loading-spinner {
  display: none;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}
.loading-spinner.visible { display: flex; }
.spinner-dots span {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold);
  animation: dot-pulse 1.2s infinite;
}
.spinner-dots span:nth-child(2) { animation-delay: 0.2s; }
.spinner-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dot-pulse {
  0%, 60%, 100% { transform: scale(1); opacity: 0.4; }
  30% { transform: scale(1.3); opacity: 1; }
}

/* ── FILE UPLOAD ────────────────────────────────────────────────────────────── */
.file-drop-zone {
  border: 2px dashed var(--border-med);
  padding: 2rem;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}
.file-drop-zone:hover, .file-drop-zone.dragover {
  border-color: var(--gold);
  background: var(--gold-light);
}
.file-drop-zone input[type="file"] { display: none; }
.file-drop-zone .drop-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.file-drop-zone p {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}
.file-drop-zone .file-name {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gold-text);
  margin-top: 0.5rem;
}

/* ── FORM ELEMENTS ──────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}
.form-control {
  width: 100%;
  background: var(--white);
  border: 1px solid var(--border-med);
  color: var(--ink);
  padding: 0.65rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}
.form-control:focus { border-color: var(--gold); }
.form-control::placeholder { color: var(--dim); }
textarea.form-control { resize: vertical; min-height: 120px; }
select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23b0a89e' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.5rem;
}

/* ── DEMO PAGE LAYOUT ───────────────────────────────────────────────────────── */
.demo-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
.demo-input-panel { position: sticky; top: calc(var(--nav-height) + 1.5rem); }
.demo-output-panel { min-height: 400px; }

.demo-cta {
  background: var(--off);
  border-top: 1px solid var(--border);
  padding: 2.5rem;
  margin-top: 3rem;
  text-align: center;
}
.demo-cta h3 { margin-bottom: 0.5rem; font-size: 1.2rem; }
.demo-cta p { color: var(--muted); font-size: 0.95rem; margin-bottom: 1.5rem; }

/* ── AI DISCLOSURE ──────────────────────────────────────────────────────────── */
.ai-disclosure-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.25rem 0.6rem;
}

/* ── RESPONSIVE ─────────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4, .demo-layout {
    grid-template-columns: 1fr;
  }
  .demo-input-panel { position: static; }
  .container { padding: 0 1.25rem; }
  .section { padding: 3rem 0; }
}