/* ============================================================
   THE CUT — Design System
   Premium Video Editor Portfolio
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Space+Grotesk:wght@300;400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

/* --- Custom Properties --- */
:root {
  /* Colors */
  --black: #0a0a0a;
  --black-soft: #111111;
  --black-lighter: #1a1a1a;
  --gray-900: #222222;
  --gray-800: #333333;
  --gray-700: #444444;
  --gray-600: #666666;
  --gray-500: #888888;
  --gray-400: #aaaaaa;
  --gray-300: #cccccc;
  --cream: #f0ede6;
  --cream-dark: #d9d5cc;
  --cream-muted: rgba(240, 237, 230, 0.6);
  --amber: #c8a050;
  --amber-light: #d4b56a;
  --amber-dark: #a88535;
  --amber-glow: rgba(200, 160, 80, 0.15);
  --amber-muted: rgba(200, 160, 80, 0.4);

  /* Typography */
  --font-display: 'DM Serif Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Space Mono', 'Courier New', monospace;

  /* Fluid type scale */
  --text-xs: clamp(0.65rem, 0.6rem + 0.25vw, 0.75rem);
  --text-sm: clamp(0.75rem, 0.7rem + 0.3vw, 0.875rem);
  --text-base: clamp(0.875rem, 0.8rem + 0.4vw, 1rem);
  --text-lg: clamp(1rem, 0.9rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1rem + 1vw, 1.75rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2.25rem);
  --text-3xl: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
  --text-4xl: clamp(2.5rem, 1.5rem + 4vw, 5rem);
  --text-5xl: clamp(3rem, 1.5rem + 6vw, 7rem);
  --text-hero: clamp(3.5rem, 2rem + 8vw, 12rem);

  /* Spacing */
  --space-xs: clamp(0.25rem, 0.2rem + 0.25vw, 0.5rem);
  --space-sm: clamp(0.5rem, 0.4rem + 0.5vw, 1rem);
  --space-md: clamp(1rem, 0.8rem + 1vw, 2rem);
  --space-lg: clamp(2rem, 1.5rem + 2vw, 4rem);
  --space-xl: clamp(3rem, 2rem + 4vw, 8rem);
  --space-2xl: clamp(4rem, 3rem + 5vw, 12rem);
  --space-section: clamp(6rem, 4rem + 8vw, 16rem);

  /* Layout */
  --max-width: 1440px;
  --gutter: clamp(1.5rem, 1rem + 2vw, 4rem);

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-in-out-circ: cubic-bezier(0.85, 0, 0.15, 1);
  --duration-fast: 0.2s;
  --duration-normal: 0.4s;
  --duration-slow: 0.8s;
  --duration-slower: 1.2s;

  /* Z-index scale */
  --z-behind: -1;
  --z-base: 0;
  --z-above: 10;
  --z-nav: 100;
  --z-overlay: 500;
  --z-cursor: 10000;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--cream);
  background-color: var(--black);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Film grain overlay */
body::after {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background-image: url('../assets/noise.svg');
  background-repeat: repeat;
  opacity: 0.03;
  pointer-events: none;
  z-index: var(--z-overlay);
  animation: grain 8s steps(10) infinite;
}

@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  10% { transform: translate(-5%, -10%); }
  20% { transform: translate(-15%, 5%); }
  30% { transform: translate(7%, -25%); }
  40% { transform: translate(-5%, 25%); }
  50% { transform: translate(-15%, 10%); }
  60% { transform: translate(15%, 0%); }
  70% { transform: translate(0%, 15%); }
  80% { transform: translate(3%, 35%); }
  90% { transform: translate(-10%, 10%); }
}

/* --- Base Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  color: var(--cream);
}

p {
  line-height: 1.7;
  color: var(--cream-muted);
}

a {
  color: var(--amber);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

a:hover {
  color: var(--amber-light);
}

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

button {
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* Selection */
::selection {
  background: var(--amber);
  color: var(--black);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--black);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-700);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--amber-muted);
}

/* Firefox scrollbar */
html {
  scrollbar-width: thin;
  scrollbar-color: var(--gray-700) var(--black);
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.text-amber {
  color: var(--amber);
}

.text-cream {
  color: var(--cream);
}

.text-muted {
  color: var(--cream-muted);
}

.font-display {
  font-family: var(--font-display);
}

.font-mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-label::before {
  content: '';
  display: block;
  width: 2rem;
  height: 1px;
  background: var(--amber);
}

.section-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--gray-600);
  letter-spacing: 0.15em;
}

/* Outlined text */
.text-outline {
  -webkit-text-stroke: 1px var(--cream-muted);
  color: transparent;
}

/* Amber underline accent */
.amber-line {
  position: relative;
}

.amber-line::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-slow) var(--ease-out-expo);
}

.amber-line:hover::after,
.amber-line.is-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* --- Reveal Animation Classes --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--duration-slower) var(--ease-out-expo),
              transform var(--duration-slower) var(--ease-out-expo);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity var(--duration-slower) var(--ease-out-expo),
              transform var(--duration-slower) var(--ease-out-expo);
}

.reveal-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity var(--duration-slower) var(--ease-out-expo),
              transform var(--duration-slower) var(--ease-out-expo);
}

.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--duration-slower) var(--ease-out-expo),
              transform var(--duration-slower) var(--ease-out-expo);
}

.reveal-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Staggered children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

.stagger-children.is-visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(2) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(3) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(4) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(5) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(6) { transition-delay: 0.5s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(7) { transition-delay: 0.6s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(8) { transition-delay: 0.7s; opacity: 1; transform: translateY(0); }

/* Character split animation */
.char-reveal .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(100%);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

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

/* --- Preloader --- */
.preloader {
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s var(--ease-out-expo), visibility 0.8s;
}

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

.preloader-text {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--amber);
  position: relative;
  overflow: hidden;
}

.preloader-text::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--amber);
  animation: preloader-line 1.5s var(--ease-in-out-circ) infinite;
}

@keyframes preloader-line {
  0% { transform: translateX(-100%); }
  50% { transform: translateX(0%); }
  100% { transform: translateX(100%); }
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-md) var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  mix-blend-mode: difference;
  transition: opacity var(--duration-normal) ease;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cream);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cream);
  text-decoration: none;
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.nav-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-counter {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--gray-600);
  letter-spacing: 0.15em;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: calc(var(--z-nav) + 10);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--cream);
  transition: transform var(--duration-normal) var(--ease-out-expo),
              opacity var(--duration-fast) ease;
}

.nav-toggle.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu overlay */
.nav-mobile {
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: var(--z-nav);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-xl) var(--gutter);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              visibility var(--duration-slow);
}

.nav-mobile.is-open {
  opacity: 1;
  visibility: visible;
}

.nav-mobile-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.nav-mobile-links a {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--cream);
  text-decoration: none;
  display: block;
  transform: translateX(-20px);
  opacity: 0;
  transition: transform var(--duration-slow) var(--ease-out-expo),
              opacity var(--duration-slow) var(--ease-out-expo),
              color var(--duration-fast) ease;
}

.nav-mobile.is-open .nav-mobile-links a {
  transform: translateX(0);
  opacity: 1;
}

.nav-mobile.is-open .nav-mobile-links li:nth-child(1) a { transition-delay: 0.1s; }
.nav-mobile.is-open .nav-mobile-links li:nth-child(2) a { transition-delay: 0.15s; }
.nav-mobile.is-open .nav-mobile-links li:nth-child(3) a { transition-delay: 0.2s; }
.nav-mobile.is-open .nav-mobile-links li:nth-child(4) a { transition-delay: 0.25s; }
.nav-mobile.is-open .nav-mobile-links li:nth-child(5) a { transition-delay: 0.3s; }
.nav-mobile.is-open .nav-mobile-links li:nth-child(6) a { transition-delay: 0.35s; }
.nav-mobile.is-open .nav-mobile-links li:nth-child(7) a { transition-delay: 0.4s; }
.nav-mobile.is-open .nav-mobile-links li:nth-child(8) a { transition-delay: 0.45s; }

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

/* Frame counter */
.frame-counter {
  position: fixed;
  bottom: var(--space-md);
  left: var(--gutter);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--gray-600);
  letter-spacing: 0.15em;
  z-index: var(--z-above);
  mix-blend-mode: difference;
}

/* Scroll progress line */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--amber);
  z-index: calc(var(--z-nav) + 1);
  transform-origin: left;
  transform: scaleX(0);
  width: 100%;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-counter {
    display: none;
  }

  .frame-counter {
    display: none;
  }
}

@media (max-width: 480px) {
  :root {
    --gutter: 1.25rem;
  }
}