/* ==========================================================================
   ABUGIDA SECURITY — Design System
   Dark cybersecurity aesthetic: near-black base, deep red primary, gold accent.
   ========================================================================== */

:root {
  /* Brand palette */
  --bg-void:        #08090b;
  --bg-base:        #0c0d10;
  --bg-panel:       #121417;
  --bg-panel-alt:   #17191d;
  --bg-elevated:    #1c1f24;
  --border-subtle:  #232629;
  --border-default: #2c2f34;
  --border-strong:  #3a2325;

  --red-900: #3d0a0e;
  --red-800: #5c0f14;
  --red-700: #7a141a;
  --red-600: #9c1a21;
  --red-500: #c22029;
  --red-400: #e13139;
  --red-glow: rgba(194, 32, 41, 0.35);

  --gold-700: #8a6d1f;
  --gold-600: #b28c28;
  --gold-500: #d6ab34;
  --gold-400: #eec863;
  --gold-glow: rgba(214, 171, 52, 0.25);

  --text-primary:   #f2f1ee;
  --text-secondary: #b7b8bc;
  --text-tertiary:  #7d7f85;
  --text-disabled:  #4d4f54;

  --success: #33b17a;
  --success-bg: rgba(51, 177, 122, 0.12);
  --danger:  #e2434c;
  --danger-bg: rgba(226, 67, 76, 0.12);
  --info:    #4a90d9;
  --warn:    #d6ab34;

  --diff-easy:   #33b17a;
  --diff-medium: #d6ab34;
  --diff-hard:   #e2434c;
  --diff-insane: #9b3fe0;

  --font-display: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, 'SFMono-Regular', monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-full: 999px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.35);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.45);
  --shadow-glow-red: 0 0 0 1px var(--border-strong), 0 0 24px -6px var(--red-glow);
  --shadow-glow-gold: 0 0 0 1px rgba(214,171,52,0.25), 0 0 24px -8px var(--gold-glow);

  --nav-height: 68px;
  --container-width: 1240px;
  --transition-fast: 150ms cubic-bezier(.4,0,.2,1);
  --transition-base: 220ms cubic-bezier(.4,0,.2,1);

  /* Refresh additions — same palette, more depth/motion vocabulary */
  --brand-gradient: linear-gradient(90deg, var(--red-600), var(--gold-500));
  --shadow-glow-red-lg: 0 0 0 1px var(--border-strong), 0 0 40px -8px var(--red-glow);
  --shadow-glow-gold-lg: 0 0 0 1px rgba(214,171,52,0.3), 0 0 40px -10px var(--gold-glow);
  --ring-focus: 0 0 0 2px var(--bg-base), 0 0 0 4px var(--gold-500);
  --transition-slow: 420ms cubic-bezier(.16,1,.3,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse 900px 500px at 15% -5%, rgba(194,32,41,0.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 10%, rgba(214,171,52,0.05), transparent 55%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.012) 0px, rgba(255,255,255,0.012) 1px, transparent 1px, transparent 26px),
    repeating-linear-gradient(-45deg, rgba(255,255,255,0.012) 0px, rgba(255,255,255,0.012) 1px, transparent 1px, transparent 26px);
  background-attachment: fixed;
  min-height: 100vh;
}

/* Accessible focus ring, brand-colored, keyboard-only */
:focus-visible { outline: none; box-shadow: var(--ring-focus); border-radius: var(--radius-sm); }
.btn:focus-visible { box-shadow: var(--ring-focus); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  color: var(--text-primary);
}
p { margin: 0 0 1em; color: var(--text-secondary); }
a { color: inherit; text-decoration: none; }
code, pre, .mono { font-family: var(--font-mono); }
::selection { background: var(--red-700); color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border-default); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--red-700); }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-500);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--red-500);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--red-500);
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(10, 11, 13, 0.85);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border-subtle);
}
.site-nav::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: var(--brand-gradient);
  opacity: 0.55;
}
.site-nav .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.nav-brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; font-size: 17px; letter-spacing: 0.01em; }
.nav-brand .mark {
  width: 30px; height: 30px; border-radius: 7px;
  background: linear-gradient(145deg, var(--red-600), var(--red-800));
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; color: var(--gold-400); font-weight: 800;
  box-shadow: var(--shadow-glow-red);
  flex-shrink: 0;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.nav-brand:hover .mark { box-shadow: var(--shadow-glow-red-lg); transform: rotate(-4deg); }
.nav-brand .brand-full { color: var(--text-primary); }
.nav-brand .brand-full span { color: var(--red-400); }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  position: relative;
  padding: 8px 14px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}
.nav-links a::after {
  content: '';
  position: absolute; left: 14px; right: 14px; bottom: 3px; height: 2px;
  background: var(--brand-gradient);
  border-radius: var(--radius-full);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition-base);
}
.nav-links a:hover { color: var(--text-primary); background: var(--bg-panel-alt); }
.nav-links a.active { color: var(--gold-400); }
.nav-links a.active::after { transform: scaleX(1); }

.nav-right { display: flex; align-items: center; gap: 10px; }
.nav-toggle {
  display: none;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  background: var(--bg-panel-alt); border: 1px solid var(--border-default);
  border-radius: var(--radius-sm); cursor: pointer;
  flex-direction: column; gap: 4px;
}
.nav-toggle span { width: 16px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: transform var(--transition-fast), opacity var(--transition-fast); }
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-user {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 10px 6px 6px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  background: var(--bg-panel);
  font-size: 13px;
  cursor: pointer;
}
.nav-user .avatar { width: 26px; height: 26px; border-radius: 50%; }
.nav-user .pts { color: var(--gold-400); font-family: var(--font-mono); font-weight: 700; }

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-body);
  font-size: 14px; font-weight: 600;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, var(--red-500), var(--red-700));
  color: #fff;
  box-shadow: 0 4px 16px -4px var(--red-glow);
}
.btn-primary::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,0.22) 48%, transparent 66%);
  transform: translateX(-120%);
  transition: transform var(--transition-slow);
}
.btn-primary:hover:not(:disabled) { filter: brightness(1.1); transform: translateY(-1px); box-shadow: 0 6px 22px -4px var(--red-glow); }
.btn-primary:hover:not(:disabled)::after { transform: translateX(120%); }
.btn-secondary {
  background: transparent;
  border-color: var(--gold-600);
  color: var(--gold-400);
}
.btn-secondary:hover:not(:disabled) { background: rgba(214,171,52,0.08); border-color: var(--gold-500); box-shadow: 0 4px 16px -6px var(--gold-glow); transform: translateY(-1px); }
.btn-ghost { background: var(--bg-panel-alt); color: var(--text-secondary); border-color: var(--border-default); }
.btn-ghost:hover:not(:disabled) { color: var(--text-primary); border-color: var(--text-tertiary); }
.btn-danger { background: var(--danger-bg); color: var(--danger); border-color: rgba(226,67,76,0.3); }
.btn-danger:hover:not(:disabled) { background: rgba(226,67,76,0.2); }
.btn-sm { padding: 7px 14px; font-size: 12.5px; }
.btn-lg { padding: 14px 30px; font-size: 15px; }
.btn-block { width: 100%; }
.btn-icon { padding: 9px; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  position: relative;
  padding: 96px 0 88px;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
}
.hero-bg { position: absolute; inset: 0; z-index: 0; opacity: 0.55; }
.hero::before {
  content: '';
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background-image: linear-gradient(rgba(214,171,52,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(214,171,52,0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 700px 400px at 20% 20%, black, transparent 75%);
}
.hero-content { position: relative; z-index: 2; max-width: 760px; }
.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  line-height: 0.98;
  margin: 18px 0 20px;
  background: linear-gradient(180deg, #fff 30%, var(--text-secondary) 120%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero h1 .accent { background: linear-gradient(120deg, var(--red-400), var(--gold-500)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { font-size: 19px; color: var(--text-secondary); font-weight: 500; margin-bottom: 10px; font-family: var(--font-mono); }
.hero-desc { font-size: 16px; max-width: 560px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 56px; flex-wrap: wrap; }
.hero-stat .num { font-family: var(--font-display); font-size: 30px; font-weight: 800; color: var(--text-primary); }
.hero-stat .num .u { color: var(--gold-500); }
.hero-stat .lbl { font-size: 12px; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.08em; margin-top: 2px; }

/* ==========================================================================
   SECTIONS
   ========================================================================== */
.section { padding: 84px 0; }
.section-tight { padding: 56px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 40px; flex-wrap: wrap; gap: 16px; }
.section-head h2 { font-size: 32px; margin: 8px 0 0; position: relative; padding-left: 16px; }
.section-head h2::before {
  content: '';
  position: absolute; left: 0; top: 6px; bottom: 6px; width: 3px;
  background: var(--brand-gradient); border-radius: var(--radius-full);
}
.section-head p { margin: 0; max-width: 520px; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer { border-top: 1px solid var(--border-subtle); padding: 48px 0 32px; margin-top: 60px; }
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 32px; margin-bottom: 32px; }
.footer-links { display: flex; gap: 28px; flex-wrap: wrap; }
.footer-links a { color: var(--text-tertiary); font-size: 13.5px; }
.footer-links a:hover { color: var(--text-secondary); }
.footer-bottom { font-size: 12.5px; color: var(--text-disabled); border-top: 1px solid var(--border-subtle); padding-top: 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ==========================================================================
   FORMS
   ========================================================================== */
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 12.5px; font-weight: 600; color: var(--text-secondary); margin-bottom: 7px; text-transform: uppercase; letter-spacing: 0.05em; }
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.field textarea { font-family: var(--font-mono); resize: vertical; min-height: 90px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--red-600); box-shadow: 0 0 0 3px rgba(194,32,41,0.15);
}
.field .hint { font-size: 12px; color: var(--text-tertiary); margin-top: 6px; }
.field-error { color: var(--danger); font-size: 12.5px; margin-top: 6px; }

/* ==========================================================================
   UTILITIES
   ========================================================================== */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; } .gap-24 { gap: 24px; }
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-gold { color: var(--gold-500); }
.text-red { color: var(--red-400); }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 11px; border-radius: var(--radius-full);
  font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
  font-family: var(--font-mono);
}
.divider { height: 1px; background: var(--border-subtle); margin: 24px 0; border: none; }

@media (max-width: 980px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .nav-toggle { display: flex; order: 3; margin-left: 4px; }
  .nav-links {
    position: absolute; top: var(--nav-height); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg-panel); border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-md);
    max-height: 0; overflow: hidden; opacity: 0;
    transition: max-height var(--transition-base), opacity var(--transition-fast);
  }
  .nav-links.open { max-height: 420px; opacity: 1; }
  .nav-links a { padding: 14px 24px; border-radius: 0; border-bottom: 1px solid var(--border-subtle); }
  .nav-links a::after { display: none; }
  .hero-stats { gap: 26px; }
}
@media (max-width: 640px) {
  .grid-3 { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 56px 0; }
  .footer-grid, .footer-bottom { flex-direction: column; }
}