/* KAIZEN — Living Intelligence
   #0A0A0A · #F5F3EE · #8A8A8A */

:root {
  --black: #0a0a0a;
  --offwhite: #f5f3ee;
  --gray: #8a8a8a;
  --gray-dim: #5a5a5a;
  --gray-soft: #c8c4bc;
  --surface: #111111;
  --border: rgba(245, 243, 238, 0.08);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
}

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

html {
  scroll-behavior: auto;
  background: var(--black);
  color: var(--offwhite);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--black);
  overflow-x: hidden;
  cursor: none;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: none; }

/* Custom cursor */
#cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--offwhite);
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: difference;
  transform: translate(-50%, -50%);
  transition: width 0.35s var(--ease), height 0.35s var(--ease), opacity 0.3s;
  opacity: 0.9;
  will-change: transform;
}
#cursor.hover {
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--offwhite);
}
#progress {
  position: fixed;
  top: 0; left: 0;
  height: 1px;
  width: 0%;
  background: var(--offwhite);
  z-index: 10000;
  opacity: 0.5;
}

/* Nav */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 2.5rem;
  background: linear-gradient(180deg, rgba(10, 10, 10, 0.72) 0%, rgba(10, 10, 10, 0) 100%);
  pointer-events: none;
}
.nav > * { pointer-events: auto; }
.nav-logo {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.35em;
  font-size: 0.85rem;
}
.nav-links {
  display: flex;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-soft);
  transition: color 0.3s;
}
.nav-links a:hover { color: var(--offwhite); }

.x-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 999px;
  border: 1px solid rgba(245, 243, 238, 0.22);
  background: rgba(10, 10, 10, 0.55);
  color: var(--offwhite);
  transition: border-color 0.3s, background 0.3s, transform 0.25s var(--ease);
}
.x-btn:hover {
  border-color: rgba(245, 243, 238, 0.7);
  background: rgba(245, 243, 238, 0.08);
  transform: translateY(-1px);
}
.x-btn svg {
  width: 0.95rem;
  height: 0.95rem;
  fill: currentColor;
}

.ca-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  height: 3.15rem;
  min-width: 15.5rem;
  padding: 0 1.4rem;
  border: 1px solid rgba(245, 243, 238, 0.25);
  background: transparent;
  color: var(--offwhite);
  box-sizing: border-box;
  pointer-events: auto;
}
.ca-label {
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--gray);
  font-weight: 500;
}
.ca-value {
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  font-weight: 400;
  color: var(--offwhite);
  text-transform: uppercase;
  white-space: nowrap;
}

@media (max-width: 1100px) {
  .nav-links { display: none; }
}

@media (max-width: 768px) {
  body { cursor: auto; }
  #cursor { display: none; }
  .nav { padding: 0.9rem 1rem; }
  .x-btn { width: 2.1rem; height: 2.1rem; }
  .hero-actions .btn,
  .hero-actions .ca-box {
    min-width: 0;
    flex: 1 1 12.5rem;
  }
}

/* Shared */
.section {
  position: relative;
  min-height: 100vh;
  width: 100%;
  overflow: hidden;
}
.section-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.dim-canvas { opacity: 0.55; }

.eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 1.5rem;
  font-weight: 500;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.4rem, 5.5vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--offwhite);
}
.section-title.light { color: var(--offwhite); }
.section-head {
  position: relative;
  z-index: 2;
  padding: 8rem 2.5rem 3rem;
  max-width: 1100px;
}
.section-head.center {
  text-align: center;
  margin: 0 auto;
  max-width: 900px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2.5rem;
  padding: 1rem 1.6rem;
  border: 1px solid rgba(245, 243, 238, 0.25);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  transition: background 0.4s var(--ease), color 0.4s, border-color 0.4s;
}
.btn:hover,
.btn.primary {
  background: var(--offwhite);
  color: var(--black);
  border-color: var(--offwhite);
}
.btn.primary:hover {
  background: transparent;
  color: var(--offwhite);
}

/* 01 HERO */
.hero {
  display: flex;
  align-items: flex-end;
  min-height: 100vh;
  min-height: 100dvh;
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 2.5rem 12vh;
  max-width: 720px;
  pointer-events: none;
}
.hero-content .btn,
.hero-content .ca-box,
.hero-actions { pointer-events: auto; }
.hero-actions {
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.hero-actions .btn,
.hero-actions .ca-box {
  margin: 0;
  height: 3.15rem;
  min-width: 15.5rem;
  padding: 0 1.4rem;
  justify-content: center;
}
.hero-actions .btn {
  font-size: 0.72rem;
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(3.5rem, 12vw, 8rem);
  letter-spacing: 0.12em;
  line-height: 0.95;
  margin-bottom: 1.5rem;
  padding-left: 0.06em;
}
.hero-tagline {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  line-height: 1.4;
  color: var(--gray-soft);
  margin-bottom: 1.75rem;
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.scroll-hint span {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--offwhite), transparent);
  animation: scrollPulse 2.4s var(--ease) infinite;
}
@keyframes scrollPulse {
  0% { opacity: 0; transform: scaleY(0.3); transform-origin: top; }
  40% { opacity: 1; transform: scaleY(1); }
  100% { opacity: 0; transform: scaleY(1) translateY(12px); }
}

.fade-in { opacity: 0; transform: translateY(24px); }
/* Fallback if GSAP is delayed — hero copy still becomes readable */
.hero .fade-in {
  animation: heroFade 1.1s var(--ease) forwards;
  animation-delay: 0.45s;
}
@keyframes heroFade {
  to { opacity: 1; transform: translateY(0); }
}

/* 02 IDEA */
.idea {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 140vh;
  background: var(--black);
}
.idea-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 20vh 2rem;
  max-width: 1100px;
}
.idea-line {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.2rem, 7vw, 5.5rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0.35em 0;
  opacity: 0.15;
  transform: translateY(30px);
  color: var(--offwhite);
}
.idea-line.idea-final {
  color: var(--offwhite);
  font-weight: 500;
}
.idea-rule {
  width: 0;
  height: 1px;
  background: var(--offwhite);
  margin: 2.5rem auto;
  opacity: 0.5;
}

/* 03 BUILD MODULES */
.build {
  padding-bottom: 8rem;
  background: linear-gradient(180deg, #0a0a0a 0%, #0e0e0e 100%);
}
.modules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  padding: 0 2.5rem 4rem;
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.module {
  position: relative;
  min-height: 480px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.015);
  border-radius: 2px;
  overflow: hidden;
  transition: border-color 0.5s var(--ease), background 0.5s, transform 0.6s var(--ease);
}
.module:hover {
  border-color: rgba(245, 243, 238, 0.22);
  background: rgba(255, 255, 255, 0.03);
  transform: translateY(-6px);
}
.module-canvas {
  width: 100%;
  height: 280px;
  display: block;
}
.module-body {
  padding: 1.75rem 1.75rem 2rem;
}
.module-body h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.28em;
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}
.module-lead {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--offwhite);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.module-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--gray);
  max-width: 28ch;
}

@media (max-width: 960px) {
  .modules { grid-template-columns: 1fr; padding: 0 1.25rem; }
  .module { min-height: auto; }
}

/* 04 LOOP */
.loop {
  padding-bottom: 6rem;
  background: var(--black);
}
.loop-stage {
  position: relative;
  width: min(720px, 92vw);
  height: min(720px, 92vw);
  margin: 2rem auto 4rem;
}
#loop-canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.loop-steps {
  list-style: none;
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.loop-steps li {
  position: absolute;
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  color: var(--gray-dim);
  transition: color 0.5s, transform 0.5s var(--ease);
  font-weight: 500;
}
.loop-steps li.active {
  color: var(--offwhite);
  transform: scale(1.08);
}
.loop-steps li:nth-child(1) { top: 6%; left: 50%; transform: translateX(-50%); }
.loop-steps li:nth-child(1).active { transform: translateX(-50%) scale(1.08); }
.loop-steps li:nth-child(2) { top: 32%; right: 4%; }
.loop-steps li:nth-child(3) { bottom: 18%; right: 18%; }
.loop-steps li:nth-child(4) { bottom: 18%; left: 18%; }
.loop-steps li:nth-child(5) { top: 32%; left: 4%; }
.loop-version {
  position: absolute;
  bottom: -2.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  color: var(--gray);
  text-transform: uppercase;
}

/* 05 SYSTEM */
.system {
  min-height: 180vh;
  background: #050505;
}
.system-copy {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0 2.5rem 12vh;
  z-index: 2;
  pointer-events: none;
  max-width: 700px;
}
.system-labels span {
  position: absolute;
  z-index: 3;
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  color: var(--gray);
  opacity: 0;
  transition: opacity 0.6s;
}
.system-labels span.visible { opacity: 1; }
.system-labels span[data-label="intelligence"] { top: 22%; left: 12%; }
.system-labels span[data-label="coordination"] { top: 38%; right: 14%; }
.system-labels span[data-label="execution"] { top: 58%; left: 18%; }
.system-labels span[data-label="evolution"] { top: 72%; right: 20%; }

/* 06 LABS */
.labs {
  padding-bottom: 8rem;
  background: var(--black);
}
.labs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  padding: 0 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
}
.lab-card {
  position: relative;
  min-height: 340px;
  border: 1px solid var(--border);
  padding: 2rem;
  overflow: hidden;
  background: #0c0c0c;
  transition: border-color 0.4s, transform 0.5s var(--ease);
}
.lab-card:hover {
  border-color: rgba(245, 243, 238, 0.2);
  transform: translateY(-4px);
}
.lab-status {
  display: inline-block;
  font-size: 0.62rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 1.5rem;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border);
}
.lab-status.building { color: var(--offwhite); border-color: rgba(245,243,238,0.25); }
.lab-status.dev { color: var(--gray-soft); }
.lab-card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.2em;
  font-size: 1rem;
  margin-bottom: 0.5rem;
}
.lab-card > p {
  color: var(--gray);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}
.lab-visual {
  position: absolute;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 35%, rgba(245,243,238,0.2), transparent 55%),
    radial-gradient(circle at 70% 70%, rgba(138,138,138,0.15), transparent 50%),
    #141414;
  border: 1px solid var(--border);
  animation: floatLab 6s ease-in-out infinite;
}
.lab-visual[data-vis="flow"] {
  border-radius: 8px;
  animation-duration: 7s;
}
.lab-visual[data-vis="core"] {
  border-radius: 20% 40% 30% 50%;
  animation-duration: 8s;
}
@keyframes floatLab {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.lab-card.classified {
  background: #090909;
}
.lab-card.classified h3 {
  filter: blur(4px);
  user-select: none;
}
.classified-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 10, 0.72);
  font-family: var(--font-display);
  letter-spacing: 0.45em;
  font-size: 0.85rem;
  transition: background 0.6s;
}
.lab-card.classified:hover .classified-overlay {
  background: rgba(10, 10, 10, 0.42);
}
.lab-card.classified:hover h3 {
  filter: blur(2px);
}

@media (max-width: 768px) {
  .labs-grid { grid-template-columns: 1fr; padding: 0 1.25rem; }
  .section-head { padding: 6rem 1.25rem 2rem; }
}

/* 07 ITERATION */
.iteration {
  padding-bottom: 6rem;
  background: #080808;
}
.iteration-stage {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  text-align: center;
}
#iteration-canvas {
  width: 100%;
  height: min(420px, 55vw);
  display: block;
  margin-bottom: 2.5rem;
}
.timeline {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.timeline button {
  width: 52px;
  height: 52px;
  border: 1px solid var(--border);
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--gray);
  transition: all 0.35s var(--ease);
  border-radius: 50%;
}
.timeline button:hover,
.timeline button.active {
  border-color: var(--offwhite);
  color: var(--offwhite);
  background: rgba(245, 243, 238, 0.06);
}
.timeline button.inf { font-size: 1.1rem; }
.timeline-caption {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--gray);
  text-transform: uppercase;
}

/* 08 FINAL */
.final {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
}
.final-content {
  position: relative;
  z-index: 2;
  padding: 2rem;
}
.final .hero-title {
  margin-bottom: 1.25rem;
}
.final .hero-tagline {
  margin-bottom: 0.5rem;
}

/* Footer */
.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 2rem 2.5rem 3rem;
  border-top: 1px solid var(--border);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--gray);
  text-transform: uppercase;
  flex-wrap: wrap;
}
.footer span:nth-child(1) {
  font-family: var(--font-display);
  letter-spacing: 0.3em;
  color: var(--gray-soft);
}

@media (max-width: 640px) {
  .footer { flex-direction: column; text-align: center; gap: 0.75rem; }
  .footer span:nth-child(2) { order: 3; font-size: 0.65rem; }
}