/* ============================================
   ARLAN LLC — Design System
   "Brilliance in Every Detail"
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800;900&display=swap');

/* --- Design Tokens --- */
:root {
  /* Colors */
  --color-primary: #0A1628;
  --color-primary-light: #0F1F38;
  --color-primary-dark: #060E1A;
  --color-secondary: #F5A623;
  --color-secondary-light: #FFBD4F;
  --color-secondary-dark: #D4891A;
  --color-accent: #FFFFFF;
  --color-charcoal: #2C3E50;
  --color-cream: #FFF8E7;
  --color-text: #E8E8E8;
  --color-text-muted: #94A3B8;
  --color-text-dark: #1E293B;
  --color-surface: rgba(15, 31, 56, 0.6);
  --color-surface-hover: rgba(15, 31, 56, 0.8);
  --color-glass: rgba(255, 255, 255, 0.05);
  --color-glass-border: rgba(255, 255, 255, 0.1);
  --color-glass-hover: rgba(255, 255, 255, 0.1);
  --color-success: #22C55E;
  --color-error: #EF4444;
  --color-overlay: rgba(10, 22, 40, 0.85);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.5rem;
  --fs-4xl: 3rem;
  --fs-5xl: 3.75rem;
  --fs-6xl: 4.5rem;
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;
  --fw-black: 900;
  --lh-tight: 1.1;
  --lh-snug: 1.25;
  --lh-normal: 1.5;
  --lh-relaxed: 1.75;
  --ls-tight: -0.02em;
  --ls-normal: 0;
  --ls-wide: 0.05em;
  --ls-wider: 0.1em;
  --ls-widest: 0.2em;

  /* Spacing */
  --sp-xs: 0.25rem;
  --sp-sm: 0.5rem;
  --sp-md: 1rem;
  --sp-lg: 1.5rem;
  --sp-xl: 2rem;
  --sp-2xl: 3rem;
  --sp-3xl: 4rem;
  --sp-4xl: 6rem;
  --sp-5xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --max-width-wide: 1400px;
  --nav-height: 80px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 20px;
  --border-radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(245, 166, 35, 0.15);
  --shadow-glow-strong: 0 0 60px rgba(245, 166, 35, 0.25);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background-color: var(--color-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--color-accent);
}

h1 {
  font-size: var(--fs-5xl);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-tight);
}

h2 {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-extrabold);
}

h3 {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
}

h4 {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
}

p {
  margin-bottom: var(--sp-md);
  color: var(--color-text-muted);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--ls-widest);
  color: var(--color-secondary);
  margin-bottom: var(--sp-md);
  display: block;
}

.section-title {
  font-size: var(--fs-3xl);
  margin-bottom: var(--sp-lg);
}

.section-subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: var(--lh-relaxed);
}

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--sp-xl);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.container--wide {
  max-width: var(--max-width-wide);
}

.section {
  padding: var(--sp-5xl) 0;
  position: relative;
}

.section--dark {
  background-color: var(--color-primary-dark);
}

.section--pattern {
  background-image:
    radial-gradient(circle at 20% 50%, rgba(245, 166, 35, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(245, 166, 35, 0.02) 0%, transparent 50%);
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-xl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-xl);
}

.text-center {
  text-align: center;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(245, 166, 35, 0.1);
  }
  50% {
    box-shadow: 0 0 40px rgba(245, 166, 35, 0.25);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger children */
.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger.visible > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(2) { transition-delay: 100ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(3) { transition-delay: 200ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(4) { transition-delay: 300ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(5) { transition-delay: 400ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(6) { transition-delay: 500ms; opacity: 1; transform: translateY(0); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  h1 { font-size: var(--fs-4xl); }
  h2 { font-size: var(--fs-2xl); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }
  h1 { font-size: var(--fs-3xl); }
  h2 { font-size: var(--fs-xl); }
  .section { padding: var(--sp-3xl) 0; }
  .container { padding: 0 var(--sp-md); }
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  h1 { font-size: var(--fs-2xl); }
}