:root {
  /* Colors */
  --surface: #121317;
  --surface-dim: #121317;
  --surface-bright: #38393d;
  --surface-container-lowest: #0d0e12;
  --surface-container-low: #1a1b1f;
  --surface-container: #1e1f23;
  --surface-container-high: #292a2e;
  --surface-container-highest: #343539;
  --on-surface: #e3e2e7;
  --on-surface-variant: #d0c6ab;
  --inverse-surface: #e3e2e7;
  --inverse-on-surface: #2f3034;
  --outline: #999077;
  --outline-variant: #4d4732;
  --surface-tint: #e9c400;
  --primary: #fff6df;
  --on-primary: #3a3000;
  --primary-container: #ffd700;
  --on-primary-container: #705e00;
  --inverse-primary: #705d00;
  --secondary: #c8c6c5;
  --on-secondary: #313030;
  --secondary-container: #4a4949;
  --on-secondary-container: #bab8b7;
  --tertiary: #defcff;
  --on-tertiary: #00363a;
  --tertiary-container: #00f1ff;
  --on-tertiary-container: #006a70;
  --error: #ffb4ab;
  --on-error: #690005;
  --error-container: #93000a;
  --on-error-container: #ffdad6;
  --primary-fixed: #ffe16d;
  --primary-fixed-dim: #e9c400;
  --on-primary-fixed: #221b00;
  --on-primary-fixed-variant: #544600;
  --secondary-fixed: #e5e2e1;
  --secondary-fixed-dim: #c8c6c5;
  --on-secondary-fixed: #1c1b1b;
  --on-secondary-fixed-variant: #474646;
  --tertiary-fixed: #79f5ff;
  --tertiary-fixed-dim: #00dbe8;
  --on-tertiary-fixed: #002022;
  --on-tertiary-fixed-variant: #004f54;
  --background: #121317;
  --on-background: #e3e2e7;
  --surface-variant: #343539;
  
  /* Spacing */
  --spacing-unit: 8px;
  --container-max: 1200px;
  --gutter: 24px;
  --margin-mobile: 20px;
  --margin-desktop: 64px;
  --section-gap: 128px;
  
  /* Border Radius */
  --radius-sm: 0.125rem;
  --radius-default: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;
  
  /* Typography */
  --font-geist: 'Geist', sans-serif;
  --font-inter: 'Inter', sans-serif;
  --font-jetbrains: 'JetBrains Mono', monospace;
}

/* Reset & Global */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-inter);
  background-color: var(--background);
  color: var(--on-surface);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

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

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

/* Typography Utility Classes */
.font-display-lg {
  font-family: var(--font-geist);
  font-size: 72px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.font-display-lg-mobile {
  font-family: var(--font-geist);
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .md\:font-display-lg {
    font-size: 72px;
  }
}

.font-headline-md {
  font-family: var(--font-geist);
  font-size: 32px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.font-body-lg {
  font-family: var(--font-inter);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.6;
}

.font-body-md {
  font-family: var(--font-inter);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
}

.font-label-sm {
  font-family: var(--font-jetbrains);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.text-primary { color: var(--primary); }
.text-primary-container { color: var(--primary-container); }
.text-on-surface-variant { color: var(--on-surface-variant); }
.text-on-primary-fixed { color: var(--on-primary-fixed); }
.italic { font-style: italic; }
.tracking-tighter { letter-spacing: -0.05em; }
.tracking-widest { letter-spacing: 0.1em; }
.uppercase { text-transform: uppercase; }

/* Layout & Spacing */
.max-w-container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
}

.px-margin {
  padding-left: var(--margin-mobile);
  padding-right: var(--margin-mobile);
}

@media (min-width: 768px) {
  .px-margin {
    padding-left: var(--margin-desktop);
    padding-right: var(--margin-desktop);
  }
}

.py-section {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
}

.min-h-screen { min-height: 100vh; }
.h-full { height: 100%; }
.w-full { width: 100%; }
.mx-auto { margin-left: auto; margin-right: auto; }

.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }
.mb-20 { margin-bottom: 5rem; }

.p-4 { padding: 1rem; }
.p-12 { padding: 3rem; }

/* Flex & Grid */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.space-x-4 > * + * { margin-left: 1rem; }
.space-x-6 > * + * { margin-left: 1.5rem; }
.space-x-12 > * + * { margin-left: 3rem; }
.space-y-4 > * + * { margin-top: 1rem; }
.space-y-8 > * + * { margin-top: 2rem; }
.space-y-12 > * + * { margin-top: 3rem; }

.grid { display: grid; }
.gap-4 { gap: 1rem; }
.gap-8 { gap: 2rem; }
.gap-gutter { gap: var(--gutter); }

.hidden { display: none; }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:flex-row { flex-direction: row; }
  .md\:flex { display: flex; }
  .md\:block { display: block; }
}

/* Backgrounds & Borders */
.bg-surface-container { background-color: var(--surface-container); }
.bg-surface-container-low { background-color: var(--surface-container-low); }
.bg-surface-container-lowest { background-color: var(--surface-container-lowest); }
.bg-surface-variant { background-color: var(--surface-variant); }

.border { border: 1px solid var(--surface-variant); }
.border-b { border-bottom: 1px solid var(--surface-variant); }
.border-t { border-top: 1px solid var(--surface-variant); }
.border-y {
  border-top: 1px solid var(--surface-variant);
  border-bottom: 1px solid var(--surface-variant);
}

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius-lg); }
.overflow-hidden { overflow: hidden; }

/* Interactive Elements */
.glass-nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 50;
  background: rgba(18, 19, 23, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  height: 80px;
}

.nav-link {
  color: var(--on-surface-variant);
  transition: color 0.3s;
}

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

.nav-link-active {
  color: var(--primary);
  font-weight: 700;
  border-bottom: 2px solid var(--primary-container);
  padding-bottom: 4px;
}

.btn-primary {
  background-color: var(--primary-container);
  color: var(--on-primary-fixed);
  padding: 12px 32px;
  font-weight: bold;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background-color 0.3s, transform 0.1s;
}

.btn-primary:hover {
  background-color: var(--primary);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  padding: 12px 32px;
  font-weight: bold;
  border: 1px solid var(--outline);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: border-color 0.3s;
}

.btn-outline:hover {
  border-color: var(--primary-container);
}

.project-card {
  border: 1px solid var(--surface-variant);
  background-color: var(--surface-container-lowest);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s;
}

.project-card:hover {
  border-color: var(--primary-container);
}

.service-card {
  padding: 2rem;
  border: 1px solid var(--surface-variant);
  background-color: var(--surface-container-low);
  border-radius: var(--radius-default);
  transition: border-color 0.3s;
  position: relative;
}

.service-card:hover {
  border-color: var(--primary-container);
}

.service-card .signature-line {
  position: absolute;
  bottom: 0;
  left: 0;
}

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.signature-line {
  height: 2px;
  background-color: var(--primary-container);
  width: 0;
  transition: width 1s cubic-bezier(0.65, 0, 0.35, 1);
}

.reveal.active .signature-line {
  width: 100%;
}

.signature-line.fixed-width {
  width: 80px;
}

.reveal.active .signature-line.fixed-width {
  width: 80px;
}

.stagger-1 { transition-delay: 100ms; }
.stagger-2 { transition-delay: 200ms; }
.stagger-3 { transition-delay: 300ms; }

/* Image Effects */
.img-grayscale {
  filter: grayscale(100%);
  object-fit: cover;
  transition: filter 0.7s;
}

.img-grayscale:hover, .project-card:hover .img-grayscale {
  filter: grayscale(0%);
}

.aspect-square {
  aspect-ratio: 1 / 1;
}

/* Forms */
.form-group {
  margin-bottom: 2rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
}

.form-input {
  width: 100%;
  background-color: transparent;
  border: none;
  border-bottom: 2px solid var(--surface-variant);
  padding: 8px 0;
  color: var(--primary);
  transition: border-color 0.3s;
}

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

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

/* Icons */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.icon-lg {
  font-size: 2.5rem;
}

/* Custom Header Spacing */
.nav-links { gap: 3rem; }
.nav-icons { gap: 1.5rem; }

@media (max-width: 767px) {
  .glass-nav { height: auto; padding: 1rem 0; }
  .nav-container { flex-direction: column; gap: 1rem; }
  .nav-links { gap: 1rem; flex-wrap: wrap; justify-content: center; }
  .nav-icons { display: none; }
}