/* ==========================================================================
   Learning Anything Strategies (LAS) — shared site styles
   Design tokens derived from the LA+S metallic wordmark (silver / chrome-blue / gold)
   ========================================================================== */

:root {
  --ink: #0f172a;          /* slate-900, body text */
  --ink-soft: #475569;     /* slate-600, secondary text */
  --ink-faint: #94a3b8;    /* slate-400, tertiary text */
  --paper: #ffffff;
  --paper-alt: #f6f8fb;    /* soft blue-white section bg */
  --paper-line: #e2e8f0;   /* hairline borders */

  --ink-dark: #0a0d12;     /* near-black, matches logo background */
  --ink-dark-2: #12161e;
  --ink-dark-line: #262b36;

  --silver: #9aa4b2;
  --silver-light: #e6e9ee;
  --chrome-blue: #5b8def;
  --chrome-blue-light: #a7c8ff;
  --gold: #d4af37;
  --gold-light: #f3d27a;

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px -8px rgba(15, 23, 42, 0.12);
  --shadow-card-hover: 0 4px 12px rgba(15, 23, 42, 0.06), 0 16px 40px -12px rgba(15, 23, 42, 0.18);

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Fraunces', Georgia, serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

/* ---- Metallic text treatment (headlines, wordmark) ---- */
.metallic-text {
  background: linear-gradient(100deg, var(--silver) 0%, var(--silver-light) 18%, var(--chrome-blue-light) 42%, var(--chrome-blue) 58%, var(--gold-light) 80%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.gold-text {
  background: linear-gradient(100deg, var(--gold) 0%, var(--gold-light) 50%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.chrome-text {
  color: var(--chrome-blue);
}

/* ---- Dark section wrapper (matches logo's black backdrop) ---- */
.dark-section {
  background: radial-gradient(120% 140% at 15% 0%, #1a2130 0%, var(--ink-dark) 55%, #05070a 100%);
  color: #e2e8f0;
}
.dark-section .ink-soft { color: #94a3b8; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(100deg, #2563eb, #1d4ed8);
  color: #ffffff;
  box-shadow: 0 8px 20px -6px rgba(37, 99, 235, 0.55);
}
.btn-primary:hover { box-shadow: 0 12px 28px -6px rgba(37, 99, 235, 0.6); }

.btn-gold {
  background: linear-gradient(100deg, var(--gold-light), var(--gold));
  color: #2b1c02;
  box-shadow: 0 8px 20px -6px rgba(212, 175, 55, 0.45);
}
.btn-gold:hover { box-shadow: 0 12px 28px -6px rgba(212, 175, 55, 0.55); }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--paper-line);
  color: var(--ink);
}
.btn-outline:hover { border-color: var(--chrome-blue); color: var(--chrome-blue); }

.btn-outline-light {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.25);
  color: #ffffff;
}
.btn-outline-light:hover { border-color: rgba(255,255,255,0.6); }

/* ---- Nav ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--paper-line);
}

.nav-link {
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.925rem;
  transition: color 0.15s ease;
}
.nav-link:hover { color: var(--ink); }
.nav-link.active { color: var(--chrome-blue); }

/* ---- Cards ---- */
.card {
  background: var(--paper);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }

.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* ---- Phone mockup frame for screenshots ---- */
.phone-frame {
  border-radius: 34px;
  border: 8px solid var(--ink-dark);
  box-shadow: var(--shadow-card-hover);
  overflow: hidden;
  background: var(--ink-dark);
}
.phone-frame img { display: block; width: 100%; height: auto; }

/* ---- Section eyebrow labels ---- */
.eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--chrome-blue);
}
.dark-section .eyebrow { color: var(--gold-light); }

/* ---- Footer ---- */
.site-footer {
  background: var(--ink-dark);
  color: #94a3b8;
}
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: #ffffff; }

/* ---- Mobile nav ---- */
#mobile-nav { display: none; }
#mobile-nav.open { display: block; }

/* ---- Article prose ---- */
.article-prose h2 {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--ink);
}
.article-prose h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--ink);
}
.article-prose h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-top: 1.75rem;
  margin-bottom: 0.6rem;
  color: var(--ink);
}
.article-prose p { margin-bottom: 1.25rem; line-height: 1.8; color: #1e293b; }
.article-prose ul { margin: 0 0 1.25rem 1.5rem; line-height: 1.8; list-style-type: disc; }
.article-prose ol { margin: 0 0 1.25rem 1.5rem; line-height: 1.8; list-style-type: decimal; }
.article-prose li { margin-bottom: 0.4rem; }
.article-prose strong { color: var(--ink); }
.article-prose table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}
.article-prose th, .article-prose td {
  border: 1px solid var(--paper-line);
  padding: 0.6rem 0.8rem;
  text-align: left;
}
.article-prose th { background: var(--paper-alt); font-weight: 700; }
.article-prose blockquote {
  border-left: 3px solid var(--gold);
  padding: 0.25rem 0 0.25rem 1.25rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--ink-soft);
}

/* ---- Utility ---- */
.section { padding: 5rem 0; }
@media (max-width: 768px) {
  .section { padding: 3.5rem 0; }
}