/* ===========================
   Design tokens
   =========================== */
:root {
  --bg: #050508;
  --text: #e8e8ec;
  --text-dim: rgba(232, 232, 236, 0.3);
  --text-muted: rgba(232, 232, 236, 0.55);
  --accent: #8b9cf7;
  --accent-warm: #c4a0f7;
  --font-display: 'Unbounded', sans-serif;
  --font-body: 'Inter', sans-serif;
}

/* ===========================
   Reset — clean foundation
   =========================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  letter-spacing: 0.01em;
}

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

::selection {
  background: var(--accent);
  color: var(--bg);
}

/* ===========================
   Canvas — the page IS the canvas
   =========================== */
#cube-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* ===========================
   Grain — subtle, barely there
   =========================== */
.grain {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0.025;
  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");
  background-repeat: repeat;
  background-size: 180px;
}

/* ===========================
   Hamburger — restrained, precise
   =========================== */
.hamburger {
  position: fixed;
  top: 2.5rem;
  right: 2.5rem;
  z-index: 100;
  width: 32px;
  height: 24px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  mix-blend-mode: difference;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.5s cubic-bezier(0.77, 0, 0.175, 1),
              opacity 0.4s ease;
  transform-origin: center;
}

.hamburger.active span:first-child {
  transform: translateY(4.25px) rotate(45deg);
}

.hamburger.active span:last-child {
  transform: translateY(-4.25px) rotate(-45deg);
}

/* ===========================
   Menu Overlay — full screen, blurred
   =========================== */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(5, 5, 8, 0.92);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 0 10vw;
  clip-path: circle(0% at calc(100% - 3.5rem) 3.5rem);
  transition: clip-path 0.7s cubic-bezier(0.77, 0, 0.175, 1);
}

.menu-overlay.active {
  clip-path: circle(150% at calc(100% - 3.5rem) 3.5rem);
}

.menu-nav {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.menu-link {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.8vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.15;
  padding: 0.3rem 0;
  opacity: 0;
  transform: translateX(-40px);
  display: flex;
  align-items: baseline;
  gap: 1rem;
  transition: color 0.3s ease;
}

.menu-link:hover {
  color: var(--accent);
}

.menu-link-index {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  min-width: 2rem;
}

.menu-overlay.active .menu-link {
  opacity: 1;
  transform: translateX(0);
}


/* ===========================
   Hero Text — bottom left
   Appears after the cube settles.
   The text is quiet; the cube speaks first.
   =========================== */
.hero-text {
  position: fixed;
  bottom: 4rem;
  left: 4rem;
  z-index: 10;
  pointer-events: none;
  max-width: 600px;
}

.hero-label {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
  opacity: 0;
}

.hero-heading {
  font-family: 'Cabinet Grotesk', sans-serif;
  font-size: clamp(2.4rem, 4.8vw, 4.2rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.hero-heading .line {
  display: block;
  overflow: hidden;
  opacity: 0;
}

.hero-heading .line {
  white-space: nowrap;
}

.hero-heading .accent {
  color: var(--accent);
}

/* ===========================
   Scroll Hint — a single descending line
   Disappears on scroll. No text needed.
   =========================== */
.scroll-hint {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  pointer-events: none;
  opacity: 0;
}

.scroll-hint-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--text-dim), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.2; transform: scaleY(0.6); transform-origin: top; }
  50% { opacity: 0.6; transform: scaleY(1); transform-origin: top; }
}

/* ===========================
   Scroll Content
   =========================== */
.scroll-content {
  position: relative;
  z-index: 10;
  margin-top: 100vh;
}

.section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 6rem 4rem;
}

/* Alternate alignment: odd left, even right */
.section:nth-child(odd) {
  justify-content: flex-start;
}

.section:nth-child(even) {
  justify-content: flex-end;
}

.section-inner {
  max-width: 540px;
}

.section-number {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--accent);
  display: block;
  margin-bottom: 1.8rem;
  opacity: 0;
  transform: translateY(15px);
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(15px);
}

.section-body {
  font-size: 1.25rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 420px;
  opacity: 0;
  transform: translateY(15px);
}

.cta-btn {
  display: inline-block;
  margin-top: 2.5rem;
  padding: 0.9rem 2.2rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--bg);
  background: var(--text);
  border-radius: 100px;
  transition: background 0.4s ease, transform 0.4s ease, box-shadow 0.4s ease;
  opacity: 0;
  transform: translateY(15px);
}

.cta-btn:hover {
  background: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(139, 156, 247, 0.2);
}

/* ===========================
   Responsive — mobile refinement
   =========================== */
@media (max-width: 768px) {
  .hero-text {
    bottom: 2.5rem;
    left: 1.5rem;
    right: 1.5rem;
  }

  .hamburger {
    top: 1.5rem;
    right: 1.5rem;
  }

  .menu-overlay {
    padding: 0 6vw;
    clip-path: circle(0% at calc(100% - 2.5rem) 2.5rem);
  }

  .menu-overlay.active {
    clip-path: circle(150% at calc(100% - 2.5rem) 2.5rem);
  }

  .section {
    padding: 4rem 1.5rem;
    justify-content: flex-start !important;
  }

  .scroll-hint {
    bottom: 1.5rem;
  }

  .hero-heading .line {
    white-space: normal;
  }

  .cube-form {
    width: 90vw !important;
    padding: 2rem !important;
  }

  .cube-form-row {
    flex-direction: column !important;
  }
}

/* ===========================
   Form Overlay — floats over the cube
   =========================== */
.cube-form-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.cube-form-overlay.active {
  opacity: 1;
  visibility: visible;
}

.cube-form-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 8, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.cube-form {
  position: relative;
  width: 440px;
  max-width: 90vw;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cube-form-overlay.active .cube-form {
  transform: scale(1) translateY(0);
}

.cube-form-close {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.3s ease;
}

.cube-form-close:hover {
  color: var(--text);
}

.cube-form-row {
  display: flex;
  gap: 1rem;
}

.cube-form-row .cube-form-group {
  flex: 1;
}

.cube-form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.cube-form-group label {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.cube-form-group input,
.cube-form-group textarea {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 300;
  outline: none;
  transition: border-color 0.3s ease;
}

.cube-form-group input:focus,
.cube-form-group textarea:focus {
  border-color: var(--accent);
}

.cube-form-group input::placeholder,
.cube-form-group textarea::placeholder {
  color: var(--text-dim);
}

.cube-form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.cube-form-submit {
  margin-top: 0.5rem;
  padding: 0.85rem 2rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--bg);
  background: var(--text);
  border: none;
  border-radius: 100px;
  cursor: pointer;
  transition: background 0.4s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.cube-form-submit:hover {
  background: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(139, 156, 247, 0.2);
}