/* ═══════════════════════════════════════════════════════════
   ITHEMBALETHU — BASE DESIGN SYSTEM
   "Solid Foundations. Infinite Hope."
   ═══════════════════════════════════════════════════════════ */

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

/* ── CSS Custom Properties (Design Tokens) ─────────────── */
:root {
  /* Brand Colors */
  --color-safety-yellow: #FFD700;
  --color-safety-yellow-dark: #D4A800;
  --color-safety-yellow-glow: rgba(255, 215, 0, 0.25);
  --color-asphalt: #1A1A1A;
  --color-asphalt-light: #2A2A2A;
  --color-asphalt-lighter: #3A3A3A;
  --color-concrete: #F0F0F0;
  --color-concrete-dark: #D0D0D0;
  --color-concrete-muted: #A0A0A0;

  /* Extended Palette */
  --color-earth-brown: #8B6914;
  --color-blueprint: #1E3A5F;
  --color-blueprint-glow: rgba(30, 58, 95, 0.4);
  --color-danger: #E74C3C;
  --color-success: #2ECC71;
  --color-overlay: rgba(0, 0, 0, 0.7);
  --color-glass: rgba(26, 26, 26, 0.6);
  --color-glass-border: rgba(255, 215, 0, 0.15);

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

  /* Fluid Type Scale (clamp) */
  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.3vw, 0.95rem);
  --text-base: clamp(0.95rem, 0.88rem + 0.35vw, 1.1rem);
  --text-lg: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  --text-xl: clamp(1.3rem, 1.1rem + 1vw, 1.8rem);
  --text-2xl: clamp(1.6rem, 1.3rem + 1.5vw, 2.5rem);
  --text-3xl: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
  --text-4xl: clamp(2.5rem, 1.8rem + 3.5vw, 5rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 7rem);

  /* Spacing Scale */
  --space-2xs: clamp(0.25rem, 0.2rem + 0.15vw, 0.35rem);
  --space-xs: clamp(0.5rem, 0.4rem + 0.25vw, 0.65rem);
  --space-sm: clamp(0.75rem, 0.65rem + 0.5vw, 1rem);
  --space-md: clamp(1rem, 0.85rem + 0.75vw, 1.5rem);
  --space-lg: clamp(1.5rem, 1.2rem + 1.5vw, 2.5rem);
  --space-xl: clamp(2rem, 1.5rem + 2.5vw, 4rem);
  --space-2xl: clamp(3rem, 2rem + 4vw, 6rem);
  --space-3xl: clamp(4rem, 3rem + 5vw, 8rem);

  /* Layout */
  --container-max: 1400px;
  --container-narrow: 900px;
  --header-height: 80px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px var(--color-safety-yellow-glow);
  --shadow-glow-strong: 0 0 60px var(--color-safety-yellow-glow);

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-heavy: cubic-bezier(0.7, 0, 0.3, 1);
  --transition-fast: 200ms var(--ease-out-expo);
  --transition-base: 400ms var(--ease-out-expo);
  --transition-slow: 700ms var(--ease-out-expo);
  --transition-heavy: 800ms var(--ease-heavy);

  /* Z-index Scale */
  --z-below: -1;
  --z-base: 1;
  --z-above: 10;
  --z-nav: 100;
  --z-overlay: 500;
  --z-modal: 1000;
  --z-cursor: 9999;
}

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

html {
  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-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-concrete);
  background-color: var(--color-asphalt);
  overflow-x: hidden;
  min-height: 100vh;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

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

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* ── Typography ────────────────────────────────────────── */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--color-concrete);
}

h1 {
  font-size: var(--text-5xl);
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-3xl);
}

h4 {
  font-size: var(--text-2xl);
}

h5 {
  font-size: var(--text-xl);
}

h6 {
  font-size: var(--text-lg);
}

p {
  max-width: 65ch;
  margin-bottom: var(--space-md);
}

.text-accent {
  color: var(--color-safety-yellow);
}

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

strong {
  font-weight: 600;
  color: var(--color-safety-yellow);
}

blockquote {
  border-left: 3px solid var(--color-safety-yellow);
  padding-left: var(--space-md);
  font-style: italic;
  color: var(--color-concrete-dark);
  font-size: var(--text-lg);
  line-height: 1.8;
}

/* ── Utility Classes ─────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

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

.section {
  padding-block: var(--space-3xl);
  position: relative;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Buttons (Shared Component) ──────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.btn:hover::before {
  transform: translateX(100%);
}

.btn--primary {
  background: var(--color-safety-yellow);
  color: var(--color-asphalt);
  border: none;
}

.btn--primary:hover {
  background: #fff;
  box-shadow: var(--shadow-glow-strong);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--color-concrete);
  border: 1px solid var(--color-asphalt-lighter);
}

.btn--outline:hover {
  border-color: var(--color-safety-yellow);
  color: var(--color-safety-yellow);
  transform: translateY(-2px);
}

/* Button Size Variants */
.btn--sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
}

.btn--lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-base);
}

.btn--full {
  width: 100%;
  justify-content: center;
}

/* Ghost Variant (transparent with subtle hover) */
.btn--ghost {
  background: transparent;
  color: var(--color-concrete-muted);
  border: none;
}

.btn--ghost:hover {
  color: var(--color-safety-yellow);
  background: rgba(255, 215, 0, 0.06);
  transform: translateY(-2px);
}

.btn__icon {
  font-size: 1.1em;
  transition: transform var(--transition-fast);
}

.btn:hover .btn__icon {
  transform: translateX(3px);
}

/* Button Group — generic reusable wrapper */
.btn-group,
.hero__cta-group {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Stacked variant for mobile or narrow contexts */
.btn-group--stacked {
  flex-direction: column;
  align-items: center;
}

/* ── Focus Styles (Accessibility) ────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-safety-yellow);
  outline-offset: 3px;
}

/* ── Selection ─────────────────────────────────────────── */
::selection {
  background: var(--color-safety-yellow);
  color: var(--color-asphalt);
}

::-moz-selection {
  background: var(--color-safety-yellow);
  color: var(--color-asphalt);
}

/* ── Scrollbar ─────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-asphalt-lighter);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-safety-yellow);
}

/* ── Reduced Motion ─────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}