/* ===================================================================
   Media Guard — Use Cases & File Types page styles
   Same design tokens as landing.css / pricing.css / compare-pda-gold.css
   =================================================================== */

:root {
  --bg: #0B1220;
  --bg-2: #0F172A;
  --bg-3: #111a2e;
  --surface: rgba(255,255,255,0.04);
  --surface-2: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.09);
  --border-2: rgba(255,255,255,0.14);
  --text: #F5F5F4;
  --text-dim: #A8B0BA;
  --text-mute: #6B7280;
  --mint: #6EE7B7;
  --mint-glow: rgba(110, 231, 183, 0.25);
  --violet: #A78BFA;
  --violet-glow: rgba(167, 139, 250, 0.22);
  --red: #F87171;
  --amber: #FBBF24;
  --radius: 14px;
  --radius-lg: 22px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 20%, transparent 75%);
  opacity: 0.5;
}
.bg-glow {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(600px circle at 15% 10%, var(--mint-glow), transparent 50%),
    radial-gradient(700px circle at 85% 30%, var(--violet-glow), transparent 55%);
  opacity: 0.9;
}

main { position: relative; z-index: 1; }

/* Layout */
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
section { padding: 100px 0; }

/* Nav */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 16px 24px; background: rgba(11,18,32,0.8); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1120px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; color: var(--text); text-decoration: none; }
.logo-mark { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; background: linear-gradient(135deg, var(--mint), #34D399); border-radius: 8px; color: #0B1220; box-shadow: 0 0 0 1px var(--border-2), 0 8px 24px -8px var(--mint-glow); }
.nav-links { display: flex; align-items: center; gap: 20px; font-size: 13px; }
.nav-links a { color: var(--text-dim); text-decoration: none; transition: color 0.15s; }
.nav-links a:hover { color: var(--text); }
.nav-cta { border-radius: 8px; }
@media (max-width: 768px) { .hide-sm { display: none !important; } .nav-links { gap: 12px; } }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; border-radius: 10px; font-weight: 600; font-size: 15px; text-decoration: none; transition: all 0.2s; cursor: pointer; border: none; }
.btn-primary { background: linear-gradient(135deg, var(--mint), #34D399); color: #0B1220; }
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-ghost { background: var(--surface-2); color: var(--text); border: 1px solid var(--border-2); }
.btn-ghost:hover { background: rgba(255,255,255,0.1); }
.btn-lg { padding: 14px 28px; font-size: 16px; }

/* Typography */
.eyebrow { display: inline-block; font-family: var(--mono); font-size: 12px; font-weight: 600; color: var(--mint); text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 14px; }
.sec-head { max-width: 640px; margin-bottom: 56px; }
.sec-head h2 { font-size: clamp(28px, 4vw, 42px); line-height: 1.15; margin: 14px 0 16px; }
.sec-head p { font-size: 17px; color: var(--text-dim); line-height: 1.6; }
h3 { font-size: 20px; line-height: 1.3; margin-bottom: 10px; }

/* Glass */
.glass { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }

/* Hero */
.hero { padding: 160px 0 80px; }
.hero h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.1; margin: 16px 0 24px; }
.hero .lede { font-size: 18px; color: var(--text-dim); line-height: 1.65; max-width: 62ch; margin-bottom: 32px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; }

/* ===================================================================
   USE CASES GRID
   =================================================================== */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.usecase-card {
  padding: 32px;
  transition: border-color 0.2s, transform 0.2s;
}
.usecase-card:hover {
  border-color: var(--border-2);
  transform: translateY(-2px);
}
.usecase-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.usecase-card h3 { margin-bottom: 10px; }
.usecase-card p { font-size: 15px; color: var(--text-dim); line-height: 1.6; margin-bottom: 16px; }
.usecase-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: var(--mono);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-mute);
}

/* ===================================================================
   FILE TYPES SECTION
   =================================================================== */
.filetypes-section { padding: 100px 0; }
.filetypes-section .sec-head { text-align: center; margin: 0 auto 56px; }

.ft-categories {
  display: grid;
  gap: 24px;
}
.ft-category {
  padding: 32px;
}
.ft-cat-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}
.ft-cat-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.ft-cat-header h3 { margin-bottom: 0; }
.ft-category > p { font-size: 15px; color: var(--text-dim); line-height: 1.6; margin-bottom: 16px; }
.ft-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.ft-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.ft-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.ft-note {
  font-size: 13px;
  color: var(--text-mute);
  font-style: italic;
  margin-top: 4px;
}

/* ===================================================================
   PROTECTION GRID
   =================================================================== */
.how-section { padding: 100px 0; }
.protection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.protection-card {
  padding: 32px;
  transition: border-color 0.2s;
}
.protection-card:hover { border-color: var(--border-2); }
.protection-num {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--mint);
  margin-bottom: 16px;
}
.protection-card p { font-size: 15px; color: var(--text-dim); line-height: 1.6; }

/* ===================================================================
   COMPATIBILITY
   =================================================================== */
.compat-section { padding: 80px 0; }
.compat-box { padding: 48px; }
.compat-list { margin-top: 32px; display: flex; flex-direction: column; gap: 18px; }
.compat-item { display: flex; align-items: flex-start; gap: 14px; font-size: 15px; color: var(--text-dim); line-height: 1.6; }
.compat-check { flex-shrink: 0; width: 28px; height: 28px; background: rgba(110,231,183,0.12); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--mint); }

/* ===================================================================
   FAQ
   =================================================================== */
.faq { max-width: 740px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.faq-item summary { display: flex; align-items: center; gap: 14px; padding: 20px 24px; font-size: 16px; font-weight: 600; cursor: pointer; list-style: none; transition: background 0.15s; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: var(--surface); }
.q-num { font-family: var(--mono); font-size: 12px; color: var(--mint); flex-shrink: 0; }
.answer { padding: 0 24px 20px 52px; }
.answer p { font-size: 15px; color: var(--text-dim); line-height: 1.65; }
.answer code { font-family: var(--mono); font-size: 13px; background: var(--surface-2); padding: 2px 6px; border-radius: 4px; }

/* ===================================================================
   FINAL CTA
   =================================================================== */
.final-cta { padding: 100px 0 80px; }
.final-cta h2 { font-size: clamp(28px, 4vw, 42px); }
.final-cta .lede { font-size: 17px; color: var(--text-dim); line-height: 1.6; }

/* ===================================================================
   FOOTER
   =================================================================== */
footer { padding: 40px 0; border-top: 1px solid var(--border); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-note { font-family: var(--mono); font-size: 11px; color: var(--text-mute); letter-spacing: 0.05em; text-decoration: none; }
.footer-note:hover { color: var(--text-dim); }
.footer-links { display: flex; gap: 20px; }

/* ===================================================================
   RESPONSIVE
   =================================================================== */
@media (max-width: 768px) {
  section { padding: 72px 0; }
  .hero { padding: 120px 0 60px; }
  .usecase-grid { grid-template-columns: 1fr; }
  .protection-grid { grid-template-columns: 1fr; }
  .compat-box { padding: 28px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: 14px; }
}