/* ============================================================
   AGIChainAI — style.css
   Dark futuristic design system | No frameworks | Pure CSS3
   ============================================================ */

/* ---------- 1. CSS Variables ---------- */
:root {
  --bg: #05070d;
  --bg-alt: #080b14;
  --bg-card: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(0, 216, 255, 0.35);

  --primary: #00d8ff;
  --secondary: #7c4dff;
  --accent: #30ffb2;

  --text: #e8ecf4;
  --text-muted: #98a2b8;
  --text-dim: #5c6578;

  --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
  --gradient-text: linear-gradient(90deg, var(--primary), var(--accent));

  --radius: 18px;
  --radius-sm: 12px;

  --shadow-glow: 0 0 40px rgba(0, 216, 255, 0.15);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);

  --font: "Segoe UI", "Inter", system-ui, -apple-system, sans-serif;

  --nav-height: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 2. Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 16px);
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--primary);
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* Accessibility: visible keyboard focus */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgba(0, 216, 255, 0.3);
  color: #fff;
}

/* ---------- 3. Layout helpers ---------- */
.container {
  width: min(1180px, 92%);
  margin-inline: auto;
}

.section {
  padding: 110px 0;
  position: relative;
}

.section-alt {
  background:
    radial-gradient(600px 300px at 85% 0%, rgba(124, 77, 255, 0.07), transparent 70%),
    var(--bg-alt);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.06rem;
}

.section-cta {
  text-align: center;
  margin-top: 56px;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  transition: transform var(--transition), box-shadow var(--transition),
    background var(--transition), border-color var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--gradient);
  color: #04131a;
  box-shadow: 0 4px 24px rgba(0, 216, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 36px rgba(0, 216, 255, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-color: var(--border);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

/* ---------- 5. Glass cards ---------- */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 30px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), border-color var(--transition),
    box-shadow var(--transition);
}

.glass-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.glass-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.glass-card p {
  color: var(--text-muted);
  font-size: 0.97rem;
}

/* ---------- 6. Navbar ---------- */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-height);
  z-index: 1000;
  background: transparent;
  transition: background var(--transition), border-color var(--transition),
    box-shadow var(--transition);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background: rgba(5, 7, 13, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.35);
}

.nav-container {
  width: min(1240px, 94%);
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
}

.logo-accent {
  color: var(--primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: block;
  padding: 9px 14px;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link-cta {
  color: #04131a;
  background: var(--gradient);
}

.nav-link-cta:hover {
  color: #04131a;
  background: var(--gradient);
  filter: brightness(1.15);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1100;
}

.nav-toggle-bar {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 7. Hero ---------- */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-height) + 40px) 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 216, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 216, 255, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, black 30%, transparent 100%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
}

.hero-glow-1 {
  width: 480px;
  height: 480px;
  background: var(--primary);
  top: -140px;
  left: -120px;
  animation: float 9s ease-in-out infinite;
}

.hero-glow-2 {
  width: 420px;
  height: 420px;
  background: var(--secondary);
  bottom: -160px;
  right: -100px;
  animation: float 11s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -30px); }
}

.hero-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(860px, 92%);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(10px);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(2.4rem, 6.5vw, 4.4rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 26px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.18rem);
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

/* Typing cursor */
.typing-cursor {
  display: inline-block;
  width: 3px;
  margin-left: 2px;
  background: var(--primary);
  animation: blink 0.9s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Hero stats */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 5vw, 56px);
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-number {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.stat-divider {
  width: 1px;
  height: 44px;
  background: var(--border);
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 44px;
  border: 2px solid var(--text-dim);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
  z-index: 2;
}

.scroll-indicator-wheel {
  width: 4px;
  height: 9px;
  border-radius: 4px;
  background: var(--primary);
  animation: scrollWheel 1.8s ease-in-out infinite;
}

@keyframes scrollWheel {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- 8. About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 26px;
}

/* ---------- 9. Mission / Vision / Values ---------- */
.mv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 60px;
  margin-bottom: 80px;
}

.mv-block p {
  color: var(--text-muted);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.value-card {
  padding: 26px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  transition: border-color var(--transition), transform var(--transition);
}

.value-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.value-card h4 {
  font-size: 1.02rem;
  margin-bottom: 8px;
  color: var(--primary);
}

.value-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ---------- 10. Ecosystem ---------- */
.eco-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 26px;
}

.eco-card img {
  margin-bottom: 18px;
  filter: drop-shadow(0 0 12px rgba(0, 216, 255, 0.4));
}

.eco-more {
  text-align: center;
  margin-top: 56px;
}

.eco-more p {
  color: var(--text-muted);
  margin-bottom: 22px;
}

.eco-more strong {
  color: var(--text);
}

/* ---------- 11. Tokenomics (pure-CSS chart) ---------- */
.tokenomics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 60px;
  align-items: center;
}

.token-chart-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 34px;
}

.token-chart {
  width: min(300px, 76vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: conic-gradient(
    var(--primary) 0% 40%,
    var(--secondary) 40% 60%,
    var(--accent) 60% 75%,
    #ff5d8f 75% 90%,
    #ffb547 90% 100%
  );
  display: grid;
  place-items: center;
  position: relative;
  box-shadow: 0 0 60px rgba(0, 216, 255, 0.2);
}

.token-chart::before {
  content: "";
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  background: var(--bg-alt);
}

.token-chart-center {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
}

.token-chart-total {
  font-size: 2.4rem;
  font-weight: 900;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.token-chart-label {
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.token-legend {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--text-muted);
}

.token-legend li {
  display: flex;
  align-items: center;
  gap: 12px;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  flex-shrink: 0;
}

.dot-1 { background: var(--primary); }
.dot-2 { background: var(--secondary); }
.dot-3 { background: var(--accent); }
.dot-4 { background: #ff5d8f; }
.dot-5 { background: #ffb547; }

.token-utility {
  display: grid;
  gap: 22px;
}

.utility-item {
  padding: 22px 26px;
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--bg-card);
  transition: border-color var(--transition), background var(--transition);
}

.utility-item:hover {
  border-left-color: var(--accent);
  background: rgba(255, 255, 255, 0.06);
}

.utility-item h4 {
  color: var(--primary);
  margin-bottom: 6px;
  font-size: 1.02rem;
}

.utility-item p {
  color: var(--text-muted);
  font-size: 0.93rem;
}

/* ---------- 12. Roadmap timeline ---------- */
.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 34px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--secondary), var(--accent));
  opacity: 0.5;
}

.timeline-item {
  position: relative;
  padding-bottom: 42px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--primary);
  box-shadow: 0 0 14px rgba(0, 216, 255, 0.7);
}

.timeline-date {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.timeline-card {
  padding: 26px 28px;
}

/* ---------- 13. Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}

.contact-card {
  padding: 26px 24px;
  text-align: center;
  color: var(--text);
}

.contact-card h4 {
  margin-bottom: 6px;
  color: var(--primary);
}

.contact-card p {
  font-size: 0.9rem;
}

/* ---------- 14. Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 70px 0 30px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 54px;
}

.footer-brand {
  max-width: 300px;
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.93rem;
  margin-top: 14px;
}

.footer-nav {
  display: flex;
  gap: clamp(32px, 6vw, 80px);
  flex-wrap: wrap;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col h5 {
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.93rem;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.84rem;
  color: var(--text-dim);
}

/* ---------- 15. Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: rgba(5, 7, 13, 0.8);
  backdrop-filter: blur(10px);
  color: var(--primary);
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity var(--transition), transform var(--transition),
    visibility var(--transition), box-shadow var(--transition);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  box-shadow: var(--shadow-glow);
}

/* ---------- 16. Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 17. Inner pages (whitepaper, faq, legal…) ---------- */
.page-hero {
  padding: calc(var(--nav-height) + 90px) 0 70px;
  text-align: center;
  background:
    radial-gradient(500px 240px at 50% 0%, rgba(0, 216, 255, 0.08), transparent 70%),
    var(--bg);
}

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.page-hero p {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
}

.doc {
  max-width: 780px;
  margin: 0 auto;
  padding: 60px 0 110px;
}

.doc h2 {
  font-size: 1.6rem;
  margin: 52px 0 16px;
  color: var(--text);
}

.doc h3 {
  font-size: 1.15rem;
  margin: 34px 0 12px;
  color: var(--primary);
}

.doc p,
.doc li {
  color: var(--text-muted);
  margin-bottom: 14px;
}

.doc ul {
  list-style: disc;
  padding-left: 24px;
}

/* FAQ accordion */
.accordion {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  overflow: hidden;
  transition: border-color var(--transition);
}

.accordion-item.open {
  border-color: var(--border-hover);
}

.accordion-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.accordion-icon {
  flex-shrink: 0;
  color: var(--primary);
  font-size: 1.3rem;
  transition: transform var(--transition);
}

.accordion-item.open .accordion-icon {
  transform: rotate(45deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.accordion-body p {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* 404 */
.error-page {
  min-height: 100svh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
}

.error-code {
  font-size: clamp(5rem, 16vw, 9rem);
  font-weight: 900;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}

/* ---------- 18. Responsive ---------- */
@media (max-width: 992px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    background: rgba(5, 7, 13, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateX(100%);
    transition: transform 0.35s ease;
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-link {
    font-size: 1.15rem;
    padding: 12px 28px;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 80px 0;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 320px;
  }

  .stat-divider {
    display: none;
  }

  .hero-stats {
    gap: 28px;
  }

  .footer-inner {
    flex-direction: column;
  }
}

/* ---------- 19. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}