/* ==========================================================================
   Ezamazwe Education Centre for Innovation — Design Tokens & Base Styles
   ========================================================================== */

:root {
  /* Palette */
  --white: #FFFFFF;
  --grey: #F5F5F7;
  --blue: #0066FF;
  --blue-dim: #2E5EDB;
  --indigo: #4B4FE0;
  --teal: #0091AE;
  --amber: #D97706;
  --amber-dim: #B45309;
  --ink: #1D1D1F;
  --ink-soft: #6E6E73;
  --hairline: rgba(0, 0, 0, 0.08);

  /* Pillar tints */
  --tint-education: linear-gradient(135deg, #EAF1FF, #F5F5F7);
  --tint-incubation: linear-gradient(135deg, #ECEBFC, #F5F5F7);
  --tint-enterprise: linear-gradient(135deg, #E4F6F8, #F5F5F7);
  --tint-performing-arts: linear-gradient(135deg, #FDF0DE, #F5F5F7);

  /* Layout */
  --content-width: 1180px;
  --radius-card: 26px;
  --radius-pill: 980px;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 200ms;
  --dur-med: 500ms;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

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

ul { list-style: none; margin: 0; padding: 0; }

button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
}

.eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--blue);
  display: inline-block;
  margin-bottom: 16px;
}

.mono {
  font-family: 'JetBrains Mono', monospace;
}

p { margin: 0; }

.text-soft { color: var(--ink-soft); }

/* Focus visibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Layout helpers */
.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 112px 0;
}

.section--grey {
  background: var(--grey);
}

@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .wrap { padding: 0 20px; }
}

/* ==========================================================================
   Nav
   ========================================================================== */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease);
}

.site-nav.is-scrolled {
  border-bottom-color: var(--hairline);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
}

.brand__mark {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a:not(.btn) {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  padding: 6px 0;
  position: relative;
}

.nav-links a:not(.btn)::after {
  content: '';
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -2px;
  height: 2px;
  background: var(--blue);
  transition: right var(--dur-fast) var(--ease);
}

.nav-links a:not(.btn):hover::after,
.nav-links a:not(.btn).is-active::after {
  right: 0;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  padding: 8px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}

@media (max-width: 920px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    border-bottom: 1px solid var(--hairline);
    padding: 8px 20px 20px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), visibility var(--dur-fast);
  }

  .nav-links.is-open {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
  }

  .nav-links a:not(.btn) {
    padding: 14px 0;
    border-bottom: 1px solid var(--hairline);
  }

  .nav-links .btn {
    margin-top: 16px;
    text-align: center;
  }

  .site-nav.is-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-nav.is-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .site-nav.is-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
  white-space: nowrap;
}

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

.btn--primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 24px rgba(0, 102, 255, 0.32);
  background: var(--blue-dim);
}

.btn--secondary {
  background: var(--grey);
  color: var(--ink);
}

.btn--secondary:hover {
  background: #E7E7EA;
  transform: translateY(-2px);
}

.btn--on-dark {
  background: var(--white);
  color: var(--ink);
}

.btn--on-dark:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 24px rgba(255, 255, 255, 0.18);
}

.btn--sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  border-radius: var(--radius-card);
  border: 1px solid var(--hairline);
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.08);
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .card:hover,
  .btn:hover {
    transform: none;
  }

  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.82);
  padding: 96px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 64px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 18px;
}

.footer-brand__mark { width: 28px; height: 28px; }

.footer-col h4 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 500;
  margin-bottom: 18px;
}

.footer-col p,
.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  margin-bottom: 10px;
  transition: color var(--dur-fast) var(--ease);
}

.footer-col a:hover {
  color: var(--white);
}

.footer-social {
  display: flex;
  gap: 14px;
  margin-top: 8px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.footer-social a:hover {
  background: var(--blue);
  transform: translateY(-3px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 920px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}