/* ============================================================
   Sunny Spark — Global Design System
   ============================================================ */

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

/* ── CSS Custom Properties (Design Tokens) ───────────────── */
:root {
  /* Primary */
  --color-primary: #F59E0B;
  --color-primary-dark: #D97706;
  --color-primary-light: #FCD34D;
  --color-primary-50: #FFFBEB;
  --color-primary-100: #FEF3C7;
  --color-primary-200: #FDE68A;

  /* Secondary */
  --color-secondary: #FB923C;
  --color-secondary-dark: #EA580C;

  /* Accent — green for eco */
  --color-accent: #16A34A;
  --color-accent-light: #BBF7D0;

  /* Neutrals — warm-toned */
  --color-bg: #FFFBF5;
  --color-bg-alt: #FFF7ED;
  --color-bg-card: #FFFFFF;
  --color-bg-dark: #1C1917;
  --color-text: #1C1917;
  --color-text-secondary: #57534E;
  --color-text-muted: #A8A29E;
  --color-text-light: #D6D3D1;
  --color-text-on-dark: #FAFAF9;
  --color-border: #FED7AA;
  --color-border-light: #FFEDD5;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #F59E0B 0%, #FB923C 100%);
  --gradient-warm: linear-gradient(135deg, #FEF3C7 0%, #FFEDD5 50%, #FFF7ED 100%);
  --gradient-hero: linear-gradient(135deg, #FFFBEB 0%, #FEF3C7 30%, #FFEDD5 60%, #FFF7ED 100%);
  --gradient-dark: linear-gradient(135deg, #1C1917 0%, #292524 100%);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Font sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(28, 25, 23, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(28, 25, 23, 0.07), 0 2px 4px -2px rgba(28, 25, 23, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(28, 25, 23, 0.08), 0 4px 6px -4px rgba(28, 25, 23, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(28, 25, 23, 0.1), 0 8px 10px -6px rgba(28, 25, 23, 0.06);
  --shadow-warm: 0 10px 30px -8px rgba(245, 158, 11, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --container-max: 1200px;
  --container-wide: 1400px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ── Typography ─────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: var(--text-5xl); font-weight: 800; }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); font-weight: 600; }

p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Layout Utilities ──────────────────────────────────── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

.section-sm {
  padding: var(--space-16) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-16);
}

.section-header .label {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-3);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-lg);
}

/* ── Grid System ───────────────────────────────────────── */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

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

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

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

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }
  .section { padding: var(--space-16) 0; }
  .section-header { margin-bottom: var(--space-10); }
  .container { padding: 0 var(--space-4); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}