/* ==========================================================================
   TripSketch Landing — CSS
   A cinematic, scroll-driven landing experience
   ========================================================================== */

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

:root {
  --color-cream: #faf5ee;
  --color-ink: #2c2418;
  --color-ink-soft: #5a4e3c;
  --color-accent: #c0956e;
  --color-accent-light: #dbb895;
  --color-glass-bg: rgba(250, 245, 238, 0.12);
  --color-glass-border: rgba(250, 245, 238, 0.18);
  --color-glass-bg-dark: rgba(44, 36, 24, 0.25);

  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-hand: 'Caveat', cursive;
  --font-body: 'Inter', -apple-system, sans-serif;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  background: #1a1610;
  color: var(--color-cream);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- Preloader ---------- */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #1a1610;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s var(--ease-out-expo), visibility 0.8s;
}

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

.preloader-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}

.preloader-sketch {
  width: 64px;
  height: 64px;
  color: var(--color-accent);
}

.preloader-icon {
  width: 100%;
  height: 100%;
}

.sketch-path {
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  animation: drawPath 2s var(--ease-out-expo) infinite;
}

.sketch-dot {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes drawPath {
  0% { stroke-dashoffset: 120; }
  50% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -120; }
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

.preloader-text {
  font-family: var(--font-hand);
  font-size: 1.4rem;
  color: var(--color-accent-light);
  letter-spacing: 0.02em;
}

.preloader-bar {
  width: 200px;
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
}

.preloader-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  border-radius: 4px;
  transition: width 0.15s ease-out;
}

.preloader-percent {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: rgba(250, 245, 238, 0.35);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

/* ---------- Canvas ---------- */
#frameCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  background: #1a1610;
}

/* ---------- Scroll Container (creates scroll height) ---------- */
#scrollContainer {
  position: relative;
  z-index: 0;
  height: 500vh; /* Scroll length — 5x viewport */
}

/* ---------- UI Overlay ---------- */
#uiOverlay {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}

#uiOverlay a,
#uiOverlay button {
  pointer-events: auto;
}

/* ---------- Navbar ---------- */
#navbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2.5rem;
  background: var(--color-glass-bg);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--color-glass-border);
  pointer-events: auto;
  z-index: 100;
  transition: transform 0.5s var(--ease-out-expo), opacity 0.5s var(--ease-out-expo);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-cream);
}

.nav-logo {
  width: 28px;
  height: 28px;
  color: var(--color-accent-light);
}

.nav-brand span {
  font-family: var(--font-hand);
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

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

.nav-link {
  color: rgba(250, 245, 238, 0.7);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent-light);
  transition: width 0.3s var(--ease-out-expo);
}

.nav-link:hover {
  color: var(--color-cream);
}

.nav-link:hover::after {
  width: 100%;
}

/* ---------- Hero Content Container ---------- */
.hero-content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Text Sections ---------- */
.text-section {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  opacity: 0;
  transform: translateY(30px);
  will-change: opacity, transform;
}

/* Dark scrim behind text for readability */
.text-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at center, rgba(20, 16, 10, 0.55) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.text-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.text-eyebrow {
  font-family: var(--font-hand);
  font-size: 1.2rem;
  color: var(--color-accent-light);
  margin-bottom: 1rem;
  letter-spacing: 0.06em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.text-headline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-cream);
  margin-bottom: 1.2rem;
  text-shadow:
    0 4px 40px rgba(0, 0, 0, 0.7),
    0 2px 10px rgba(0, 0, 0, 0.6),
    0 0 80px rgba(0, 0, 0, 0.3);
}

.text-headline em {
  font-style: italic;
  color: var(--color-accent-light);
}

.text-sub {
  font-family: var(--font-body);
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: rgba(250, 245, 238, 0.85);
  font-weight: 400;
  max-width: 420px;
  line-height: 1.6;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.7), 0 1px 4px rgba(0, 0, 0, 0.5);
}

/* ---------- Scroll Indicator ---------- */
.scroll-indicator {
  margin-top: 2.5rem;
  animation: floatUp 2.5s ease-in-out infinite;
}

.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid rgba(250, 245, 238, 0.4);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-wheel {
  width: 3px;
  height: 8px;
  background: rgba(250, 245, 238, 0.6);
  border-radius: 2px;
  animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes floatUp {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes scrollWheel {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(10px); }
}

/* ---------- CTA Button ---------- */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
  padding: 1rem 2.2rem;
  background: linear-gradient(135deg, rgba(192, 149, 110, 0.25), rgba(192, 149, 110, 0.15));
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  border: 1px solid rgba(219, 184, 149, 0.3);
  border-radius: 100px;
  color: var(--color-cream);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: all 0.4s var(--ease-out-expo);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.cta-button:hover {
  background: linear-gradient(135deg, rgba(192, 149, 110, 0.4), rgba(192, 149, 110, 0.25));
  border-color: rgba(219, 184, 149, 0.5);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(192, 149, 110, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.cta-arrow {
  width: 20px;
  height: 20px;
  transition: transform 0.3s var(--ease-out-expo);
}

.cta-button:hover .cta-arrow {
  transform: translateX(4px);
}

/* ---------- Bottom Vignette ---------- */
.bottom-vignette {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 180px;
  background: linear-gradient(to top, rgba(26, 22, 16, 0.5), transparent);
  pointer-events: none;
}

/* ---------- Canvas Vignette Overlay ---------- */
#frameCanvas::after {
  content: '';
}

/* We create the vignette with a pseudo on the overlay instead */
#uiOverlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, transparent 50%, rgba(26, 22, 16, 0.35) 100%);
  pointer-events: none;
  z-index: -1;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  #navbar {
    padding: 1rem 1.5rem;
  }

  .nav-links {
    gap: 1.2rem;
  }

  .nav-link {
    font-size: 0.8rem;
  }

  .nav-brand span {
    font-size: 1.3rem;
  }

  .text-eyebrow {
    font-size: 1rem;
  }

  .text-headline {
    font-size: clamp(2rem, 8vw, 3.5rem);
  }

  .text-sub {
    font-size: 0.9rem;
    max-width: 300px;
  }

  .cta-button {
    padding: 0.85rem 1.8rem;
    font-size: 0.9rem;
  }

  #scrollContainer {
    height: 400vh;
  }
}

@media (max-width: 480px) {
  #navbar {
    padding: 0.85rem 1rem;
  }

  .nav-links {
    gap: 0.8rem;
  }

  .nav-link {
    font-size: 0.75rem;
  }

  .text-headline {
    font-size: clamp(1.8rem, 9vw, 3rem);
  }

  .cta-button {
    padding: 0.75rem 1.5rem;
    font-size: 0.85rem;
  }
}

/* ---------- Selection ---------- */
::selection {
  background: rgba(192, 149, 110, 0.35);
  color: var(--color-cream);
}

/* ---------- Scrollbar (subtle) ---------- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(192, 149, 110, 0.25);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(192, 149, 110, 0.4);
}