/* MindBridge — Design system */
:root {
  --bg: #05080f;
  --bg-elevated: #0a101c;
  --surface: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8ecf4;
  --text-muted: #8b95a8;
  --accent: #00d4aa;
  --accent-2: #4d9fff;
  --accent-glow: rgba(0, 212, 170, 0.35);
  --gold: #c9a962;
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Instrument Sans", system-ui, sans-serif;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --nav-h: 72px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: auto;
}

html.lenis, html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.loading {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(1200px, 92vw);
  margin-inline: auto;
}

/* Cursor glow */
.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.4s;
  mix-blend-mode: screen;
}

body.cursor-active .cursor-glow {
  opacity: 0.4;
}

/* Loader */
.loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg);
  display: grid;
  place-items: center;
  transition: opacity 0.6s var(--ease-out-expo), visibility 0.6s;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-inner {
  text-align: center;
}

.loader-mark {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  color: var(--accent);
}

.loader-hex {
  stroke-dasharray: 240;
  animation: hexDraw 1.2s var(--ease-out-expo) forwards;
}

.loader-core {
  opacity: 0;
  animation: corePulse 0.6s 0.8s var(--ease-out-expo) forwards;
}

@keyframes hexDraw {
  from { stroke-dashoffset: 240; }
  to { stroke-dashoffset: 0; }
}

@keyframes corePulse {
  from { opacity: 0; transform: scale(0); }
  to { opacity: 1; transform: scale(1); }
}

.loader-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.loader-bar {
  width: 120px;
  height: 2px;
  background: var(--border);
  margin: 1.5rem auto 0;
  border-radius: 2px;
  overflow: hidden;
}

.loader-bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  animation: loadBar 1.4s var(--ease-out-expo) forwards;
}

@keyframes loadBar {
  to { width: 100%; }
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 3rem);
  transition: background 0.4s, backdrop-filter 0.4s;
}

.nav.scrolled {
  background: rgba(5, 8, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.25s;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--surface);
  transition: border-color 0.25s, background 0.25s;
}

.nav-cta:hover {
  border-color: var(--accent);
  background: rgba(0, 212, 170, 0.08);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
}

.mobile-menu {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 999;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.mobile-menu[hidden] {
  display: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: transform 0.3s var(--ease-out-expo), box-shadow 0.3s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #00b894 100%);
  color: var(--bg);
  box-shadow: 0 0 40px var(--accent-glow);
}

.btn-primary:hover {
  box-shadow: 0 0 60px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--text-muted);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 2rem) clamp(1rem, 4vw, 3rem) 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

#heroCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero-title .line {
  display: block;
  overflow: hidden;
}

.hero-title .line span {
  display: block;
  transform: translateY(110%);
}

.hero-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
}

.stat-suffix {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--accent);
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--border);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: clamp(1rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.scroll-line {
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleX(0.6); transform-origin: left; }
  50% { opacity: 1; transform: scaleX(1); }
}

/* Sections shared */
.section-tag {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.section-title em {
  font-style: normal;
  color: var(--accent-2);
}

.section-body {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 520px;
}

/* Problem */
.problem {
  padding: 8rem 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elevated) 100%);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.problem-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.glass-card {
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  backdrop-filter: blur(12px);
  transition: border-color 0.3s, transform 0.3s var(--ease-out-expo);
}

.glass-card:hover {
  border-color: rgba(0, 212, 170, 0.3);
}

.card-num {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.glass-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

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

/* 3D Model section */
.model-section {
  position: relative;
}

.model-sticky {
  position: relative;
}

.model-scroll-spacer {
  height: 400vh;
}

.model-layout {
  position: sticky;
  top: 0;
  height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 2rem;
  padding: var(--nav-h) clamp(1rem, 4vw, 3rem) 2rem;
  background: var(--bg);
}

.model-canvas-wrap {
  position: relative;
  height: min(70vh, 600px);
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: radial-gradient(ellipse at center, rgba(0, 212, 170, 0.06) 0%, transparent 70%);
}

#modelCanvas {
  width: 100%;
  height: 100%;
}

.model-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border);
}

.model-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.1s linear;
}

.model-copy {
  position: relative;
  min-height: 280px;
}

.model-step {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s var(--ease-out-expo), transform 0.5s var(--ease-out-expo);
  pointer-events: none;
}

.model-step.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.step-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.model-step h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.model-step p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 420px;
}

/* Technology bento */
.technology {
  padding: 8rem 0;
}

.tech-bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}

.bento {
  position: relative;
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}

.bento-large {
  grid-column: span 2;
  grid-row: span 2;
}

.bento-wide {
  grid-column: span 3;
}

.bento-glow {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  pointer-events: none;
}

.bento h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  position: relative;
}

.bento p {
  font-size: 0.95rem;
  color: var(--text-muted);
  position: relative;
}

.wave-viz {
  margin-top: 2rem;
  height: 80px;
  opacity: 0.8;
}

.wave-path {
  stroke-dasharray: 800;
  animation: waveFlow 4s linear infinite;
}

@keyframes waveFlow {
  to { stroke-dashoffset: -800; }
}

.compat-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
  position: relative;
}

.compat-list li {
  font-size: 0.8rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
}

/* Pipeline horizontal scroll */
.pipeline {
  padding: 6rem 0 8rem;
  overflow: hidden;
}

.pipeline-header {
  margin-bottom: 3rem;
}

.pipeline-track {
  overflow: hidden;
  cursor: grab;
}

.pipeline-track:active {
  cursor: grabbing;
}

.pipeline-inner {
  display: flex;
  gap: 1.25rem;
  padding: 0 clamp(1rem, 4vw, 3rem);
  width: max-content;
}

.pipeline-card {
  flex: 0 0 260px;
  padding: 2rem;
  background: linear-gradient(145deg, var(--bg-elevated), var(--bg));
  border: 1px solid var(--border);
  border-radius: 20px;
  transition: border-color 0.3s, transform 0.3s;
}

.pipeline-card:hover {
  border-color: rgba(77, 159, 255, 0.4);
  transform: translateY(-4px);
}

.pipe-icon {
  display: block;
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.pipeline-card h4 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.pipeline-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Impact */
.impact {
  padding: 6rem 0 0;
}

.impact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding-bottom: 4rem;
}

.impact-list {
  list-style: none;
  margin-top: 2rem;
}

.impact-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
}

.impact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.impact-metrics {
  display: flex;
  gap: 2rem;
  justify-content: center;
}

.metric-ring {
  position: relative;
  text-align: center;
}

.metric-ring svg {
  width: 140px;
  height: 140px;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 6;
}

.ring-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 327;
  stroke-dashoffset: calc(327 - (327 * var(--pct) / 100));
  transition: stroke-dashoffset 1.5s var(--ease-out-expo);
}

.metric-value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%);
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
}

.metric-label {
  display: block;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  max-width: 140px;
}

.marquee {
  border-block: 1px solid var(--border);
  padding: 1.25rem 0;
  overflow: hidden;
  margin-top: 4rem;
}

.marquee-track {
  display: flex;
  gap: 3rem;
  animation: marquee 30s linear infinite;
  width: max-content;
}

.marquee-track span {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* CTA */
.cta {
  padding: 8rem 0;
}

.cta-box {
  text-align: center;
  padding: clamp(2.5rem, 6vw, 5rem);
  background: linear-gradient(160deg, rgba(0, 212, 170, 0.08) 0%, rgba(77, 159, 255, 0.05) 50%, transparent 100%);
  border: 1px solid var(--border);
  border-radius: 32px;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, var(--accent-glow), transparent 50%);
  opacity: 0.3;
  pointer-events: none;
}

.cta-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 1rem;
  position: relative;
}

.cta-title em {
  font-style: normal;
  color: var(--accent);
}

.cta-sub {
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 2rem;
  position: relative;
}

.cta-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  max-width: 480px;
  margin: 0 auto 1rem;
  position: relative;
}

.cta-form input {
  flex: 1;
  min-width: 200px;
  padding: 0.9rem 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}

.cta-form input:focus {
  outline: none;
  border-color: var(--accent);
}

.cta-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  position: relative;
}

/* Footer */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  width: 100%;
  text-align: center;
  margin-top: 1rem;
}

/* Reveal animations base */
.reveal {
  opacity: 0;
  transform: translateY(32px);
}

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

/* Responsive */
@media (max-width: 1024px) {
  .problem-grid,
  .impact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .model-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
  }

  .model-canvas-wrap {
    height: 45vh;
  }

  .tech-bento {
    grid-template-columns: 1fr;
  }

  .bento-large,
  .bento-wide {
    grid-column: span 1;
    grid-row: span 1;
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .stat-divider {
    width: 48px;
    height: 1px;
  }

  .impact-metrics {
    flex-direction: column;
    align-items: center;
  }

  .model-scroll-spacer {
    height: 300vh;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .marquee-track {
    animation: none;
  }
}