/* ── CSS Custom Properties ─────────────────────────────────────────── */
:root {
  --obsidian: #1A1A1A;
  --surface: #242424;
  --surface-2: #2E2E2E;
  --surface-3: #383838;
  --titanium: #D1D1D1;
  --titanium-muted: #888888;
  --titanium-dim: #555555;
  --logic-blue: #3498DB;
  --logic-blue-dim: #2A7ABF;
  --hinoki: #EEDC82;
  --white: #FFFFFF;
  --error: #E74C3C;
  --font-display: 'Inter Tight', sans-serif;
  --font-body: 'Roboto Mono', monospace;
  --base-unit: 8px;
  --max-width: 900px;
  --transition-fast: 150ms ease;
  --transition-medium: 300ms ease;
  --transition-slow: 400ms ease-out;
}

/* ── Reset ─────────────────────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background-color: var(--obsidian);
  color: var(--titanium);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* ── Utility ───────────────────────────────────────────────────────── */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.fade-in { opacity: 1; transform: translateY(0); transition: opacity var(--transition-slow), transform var(--transition-slow); }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── Navigation ────────────────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: calc(var(--base-unit) * 3) calc(var(--base-unit) * 4);
  display: flex; justify-content: space-between; align-items: center;
  transition: background-color var(--transition-medium);
}
.nav.scrolled { background-color: rgba(26,26,26,0.92); backdrop-filter: blur(12px); }
.nav__logo {
  font-family: var(--font-display); font-weight: 300; font-size: 18px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--titanium);
}
.nav__logo span { color: var(--logic-blue); font-weight: 400; }
.nav__cta {
  font-family: var(--font-display); font-weight: 500; font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--titanium); border: 1px solid var(--titanium-dim);
  padding: 10px 20px; transition: all var(--transition-fast);
}
.nav__cta:hover { border-color: var(--logic-blue); color: var(--logic-blue); }

/* ── Sections ──────────────────────────────────────────────────────── */
.section {
  width: 100%; max-width: var(--max-width); margin: 0 auto;
  padding: calc(var(--base-unit) * 15) calc(var(--base-unit) * 4);
}
@media (max-width: 768px) {
  .section { padding: calc(var(--base-unit) * 10) calc(var(--base-unit) * 3); }
}

/* ── Hero ──────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; flex-direction: column;
  justify-content: center; align-items: center; text-align: center;
  position: relative; padding-top: 80px;
}
.hero__joint {
  width: 180px; height: 180px; margin-bottom: calc(var(--base-unit) * 6);
  opacity: 1;
}
.hero__headline {
  font-family: var(--font-display); font-weight: 200; font-size: clamp(32px, 5vw, 56px);
  letter-spacing: 0.15em; line-height: 1.2; color: var(--titanium);
  text-transform: uppercase; margin-bottom: calc(var(--base-unit) * 3);
}
.hero__subline {
  font-family: var(--font-display); font-weight: 300; font-size: clamp(16px, 2.5vw, 22px);
  letter-spacing: 0.08em; color: var(--titanium-muted); margin-bottom: calc(var(--base-unit) * 6);
}
.hero__cta {
  font-family: var(--font-display); font-weight: 500; font-size: 12px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--titanium); border: 1px solid var(--titanium);
  padding: 16px 40px; transition: all var(--transition-fast); display: inline-block;
}
.hero__cta:hover { border-color: var(--logic-blue); color: var(--logic-blue); }
.hero__cta:active { background: var(--logic-blue); color: var(--white); border-color: var(--logic-blue); }
.hero__scroll {
  position: absolute; bottom: calc(var(--base-unit) * 4); left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  opacity: 0.5; animation: pulse 2s ease-in-out infinite;
}
.hero__scroll-line { width: 1px; height: 40px; background: var(--titanium-dim); }
.hero__scroll-text { font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--titanium-dim); }
@keyframes pulse { 0%, 100% { opacity: 0.3; } 50% { opacity: 0.7; } }

/* ── Audit Section ─────────────────────────────────────────────────── */
.audit { display: block; }
.audit__header { text-align: center; margin-bottom: calc(var(--base-unit) * 8); }
.audit__label {
  font-family: var(--font-display); font-weight: 500; font-size: 11px;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--logic-blue);
  margin-bottom: calc(var(--base-unit) * 2); display: block;
}
.audit__title {
  font-family: var(--font-display); font-weight: 200; font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--titanium); margin-bottom: calc(var(--base-unit) * 2);
}
.audit__subtitle { color: var(--titanium-muted); font-size: 14px; max-width: 500px; margin: 0 auto; }

/* Progress */
.audit__progress { width: 100%; max-width: 400px; margin: 0 auto calc(var(--base-unit) * 6); }
.audit__progress-track { width: 100%; height: 2px; background: var(--surface-2); position: relative; }
.audit__progress-fill { height: 100%; background: var(--logic-blue); transition: width var(--transition-medium); width: 0%; }
.audit__progress-text { text-align: center; font-size: 11px; color: var(--titanium-dim); margin-top: 8px; letter-spacing: 0.1em; }

/* Question Card */
.audit__card {
  background: var(--surface); padding: calc(var(--base-unit) * 5); max-width: 600px; margin: 0 auto;
  border: 1px solid var(--surface-2);
}
.audit__question {
  font-family: var(--font-display); font-weight: 300; font-size: 20px;
  letter-spacing: 0.04em; color: var(--titanium); margin-bottom: calc(var(--base-unit) * 4); line-height: 1.5;
}
.audit__options { display: flex; flex-direction: column; gap: calc(var(--base-unit) * 2); }
.audit__option {
  display: flex; align-items: center; gap: calc(var(--base-unit) * 2);
  padding: calc(var(--base-unit) * 2) calc(var(--base-unit) * 3);
  border: 1px solid var(--surface-2); cursor: pointer;
  transition: all var(--transition-fast); font-size: 14px; color: var(--titanium-muted);
}
.audit__option:hover { border-color: var(--titanium-dim); color: var(--titanium); }
.audit__option.selected { border-color: var(--logic-blue); color: var(--logic-blue); background: rgba(52,152,219,0.05); }
.audit__option-radio {
  width: 16px; height: 16px; border: 1px solid var(--titanium-dim); border-radius: 50%;
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  transition: all var(--transition-fast);
}
.audit__option.selected .audit__option-radio { border-color: var(--logic-blue); }
.audit__option.selected .audit__option-radio::after {
  content: ''; width: 8px; height: 8px; background: var(--logic-blue); border-radius: 50%;
}

/* Navigation Buttons */
.audit__nav { display: flex; justify-content: space-between; margin-top: calc(var(--base-unit) * 4); }
.audit__btn {
  font-family: var(--font-display); font-weight: 500; font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase; padding: 12px 28px;
  transition: all var(--transition-fast);
}
.audit__btn--primary {
  background: var(--logic-blue); color: var(--white);
}
.audit__btn--primary:hover { background: var(--logic-blue-dim); }
.audit__btn--primary:disabled { opacity: 0.4; cursor: not-allowed; }
.audit__btn--ghost { color: var(--titanium-dim); border: 1px solid var(--surface-2); }
.audit__btn--ghost:hover { color: var(--titanium); border-color: var(--titanium-dim); }
.audit__btn--ghost:disabled { opacity: 0.3; cursor: not-allowed; }

/* Loading State */
.audit__loading {
  display: none; text-align: center; padding: calc(var(--base-unit) * 8);
}
.audit__loading.active { display: block; }
.audit__loading-dot {
  width: 8px; height: 8px; background: var(--logic-blue); border-radius: 50%;
  margin: 0 auto calc(var(--base-unit) * 3); animation: loading-pulse 1.5s ease-in-out infinite;
}
@keyframes loading-pulse { 0%, 100% { opacity: 0.3; transform: scale(1); } 50% { opacity: 1; transform: scale(1.3); } }
.audit__loading-text { font-family: var(--font-display); font-weight: 300; letter-spacing: 0.08em; color: var(--titanium-muted); }

/* Result State */
.audit__result { display: none; text-align: center; padding: calc(var(--base-unit) * 4); }
.audit__result.active { display: block; }
.audit__score {
  font-family: var(--font-display); font-weight: 200; font-size: clamp(64px, 10vw, 120px);
  letter-spacing: 0.05em; color: var(--logic-blue); line-height: 1;
}
.audit__score-label {
  font-family: var(--font-display); font-weight: 500; font-size: 11px;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--titanium-dim); margin-bottom: calc(var(--base-unit) * 4);
}
.audit__prescription { max-width: 500px; margin: 0 auto calc(var(--base-unit) * 6); text-align: left; }
.audit__prescription-title {
  font-family: var(--font-display); font-weight: 300; font-size: 18px;
  letter-spacing: 0.08em; color: var(--titanium); margin-bottom: calc(var(--base-unit) * 3); text-align: center;
}
.audit__prescription-item {
  display: flex; align-items: flex-start; gap: calc(var(--base-unit) * 2);
  padding: calc(var(--base-unit) * 2) 0; border-bottom: 1px solid var(--surface-2);
  font-size: 14px; color: var(--titanium-muted);
}
.audit__prescription-item:last-child { border-bottom: none; }
.audit__prescription-bullet { color: var(--logic-blue); flex-shrink: 0; margin-top: 2px; }
.audit__result-cta {
  font-family: var(--font-display); font-weight: 500; font-size: 12px;
  letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--logic-blue); color: var(--white);
  padding: 16px 40px; display: inline-block; transition: background var(--transition-fast);
}
.audit__result-cta:hover { background: var(--logic-blue-dim); }

/* ── Sovereignty Proof ─────────────────────────────────────────────── */
.sovereignty { display: flex; align-items: center; gap: calc(var(--base-unit) * 8); }
@media (max-width: 768px) { .sovereignty { flex-direction: column; gap: calc(var(--base-unit) * 5); } }
.sovereignty__diagram { flex: 0 0 280px; }
@media (max-width: 768px) { .sovereignty__diagram { flex: 0 0 auto; width: 220px; } }
.sovereignty__content { flex: 1; }
.sovereignty__badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 500; font-size: 10px;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--logic-blue);
  margin-bottom: calc(var(--base-unit) * 3);
}
.sovereignty__badge-dot {
  width: 6px; height: 6px; background: var(--logic-blue); border-radius: 50%;
  animation: status-pulse 2s ease-in-out infinite;
}
@keyframes status-pulse { 0%, 100% { opacity: 0.4; } 50% { opacity: 1; } }
.sovereignty__title {
  font-family: var(--font-display); font-weight: 200; font-size: clamp(24px, 3.5vw, 40px);
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--titanium); margin-bottom: calc(var(--base-unit) * 3); line-height: 1.3;
}
.sovereignty__copy { color: var(--titanium-muted); font-size: 14px; max-width: 420px; }
.sovereignty__copy p + p { margin-top: calc(var(--base-unit) * 2); }

/* ── Vanguard ──────────────────────────────────────────────────────── */
.vanguard { text-align: center; }
.vanguard__label {
  font-family: var(--font-display); font-weight: 500; font-size: 11px;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--hinoki);
  margin-bottom: calc(var(--base-unit) * 3); display: block;
}
.vanguard__title {
  font-family: var(--font-display); font-weight: 200; font-size: clamp(28px, 4vw, 48px);
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--titanium); margin-bottom: calc(var(--base-unit) * 3);
}
.vanguard__copy { color: var(--titanium-muted); font-size: 14px; max-width: 500px; margin: 0 auto calc(var(--base-unit) * 6); }
.vanguard__keys { display: flex; justify-content: center; gap: calc(var(--base-unit) * 3); margin-bottom: calc(var(--base-unit) * 6); }
.vanguard__key {
  width: 48px; height: 48px; border: 1px solid var(--surface-2);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 300; font-size: 18px;
  color: var(--titanium-dim); transition: all var(--transition-fast);
}
.vanguard__key:hover { border-color: var(--hinoki); color: var(--hinoki); }
.vanguard__cta {
  font-family: var(--font-display); font-weight: 500; font-size: 12px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--titanium); border: 1px solid var(--titanium);
  padding: 16px 40px; display: inline-block; transition: all var(--transition-fast);
}
.vanguard__cta:hover { border-color: var(--hinoki); color: var(--hinoki); }

/* ── Tiers ─────────────────────────────────────────────────────────── */
.tiers__header { text-align: center; margin-bottom: calc(var(--base-unit) * 8); }
.tiers__title {
  font-family: var(--font-display); font-weight: 200; font-size: clamp(24px, 3vw, 36px);
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--titanium); margin-bottom: calc(var(--base-unit) * 2);
}
.tiers__subtitle { color: var(--titanium-muted); font-size: 14px; }
.tiers__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--base-unit) * 3); }
@media (max-width: 1024px) { .tiers__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .tiers__grid { grid-template-columns: 1fr; } }
.tier {
  padding: calc(var(--base-unit) * 4); border: 1px solid var(--surface-2);
  transition: border-color var(--transition-fast); position: relative;
  display: flex; flex-direction: column; height: 100%;
}
.tier:hover { border-color: var(--surface-3); }
.tier--featured { border-color: var(--logic-blue); }
.tier--featured:hover { border-color: var(--logic-blue); }
.tier__number {
  font-family: var(--font-display); font-weight: 200; font-size: 48px;
  color: var(--surface-3); line-height: 1; margin-bottom: calc(var(--base-unit) * 2);
}
.tier__name {
  font-family: var(--font-display); font-weight: 300; font-size: 18px;
  letter-spacing: 0.08em; color: var(--titanium); margin-bottom: calc(var(--base-unit) * 1);
}
.tier__price {
  font-family: var(--font-body); font-size: 13px; color: var(--logic-blue);
  margin-bottom: calc(var(--base-unit) * 3); letter-spacing: 0.05em;
}
.tier__desc { flex: 1; font-size: 13px; color: var(--titanium-muted); margin-bottom: calc(var(--base-unit) * 4); line-height: 1.6; }
.tier__cta {
  font-family: var(--font-display); font-weight: 500; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--titanium-dim); border: 1px solid var(--surface-2);
  padding: 10px 24px; display: inline-block; transition: all var(--transition-fast);
}
.tier__cta:hover { border-color: var(--titanium); color: var(--titanium); }
.tier--featured .tier__cta { border-color: var(--logic-blue); color: var(--logic-blue); }
.tier--featured .tier__cta:hover { background: var(--logic-blue); color: var(--white); }
.tier__featured-tag {
  position: absolute; top: -1px; right: -1px;
  font-family: var(--font-display); font-weight: 500; font-size: 9px;
  letter-spacing: 0.15em; text-transform: uppercase;
  background: var(--logic-blue); color: var(--white);
  padding: 4px 12px;
}
.tier--limited { border-color: var(--hinoki); }
.tier--limited:hover { border-color: var(--hinoki); }
.tier__limited-tag {
  position: absolute; top: -1px; right: -1px;
  font-family: var(--font-display); font-weight: 500; font-size: 9px;
  letter-spacing: 0.15em; text-transform: uppercase;
  background: var(--hinoki); color: var(--obsidian);
  padding: 4px 12px;
}
.tier__cta--limited { border-color: var(--hinoki); color: var(--hinoki); }
.tier__cta--limited:hover { background: var(--hinoki); color: var(--obsidian); }

/* ── Footer ────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--surface-2); padding: calc(var(--base-unit) * 6) calc(var(--base-unit) * 4);
  text-align: center;
}
.footer__logo {
  font-family: var(--font-display); font-weight: 300; font-size: 16px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--titanium); margin-bottom: calc(var(--base-unit) * 2);
}
.footer__tagline { font-size: 12px; color: var(--titanium-dim); margin-bottom: calc(var(--base-unit) * 4); }
.footer__links { display: flex; justify-content: center; gap: calc(var(--base-unit) * 3); }
.footer__link { font-size: 12px; color: var(--titanium-dim); transition: color var(--transition-fast); }
.footer__link:hover { color: var(--titanium); }
.footer__copy { font-size: 11px; color: var(--titanium-dim); margin-top: calc(var(--base-unit) * 4); }

/* ── Grain Texture Overlay ─────────────────────────────────────────── */
.grain {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 9999; opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ── Reduced Motion ────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}