/* Learn With Luke — shared styles */

:root {
  --color-sky: #4ecdc4;
  --color-sky-dark: #3db8b0;
  --color-sun: #ffe66d;
  --color-coral: #ff6b6b;
  --color-purple: #a78bfa;
  --color-green: #6bcb77;
  --color-orange: #ff9f43;
  --color-bg: #fff9f0;
  --color-bg-alt: #ffffff;
  --color-text: #2d3436;
  --color-text-muted: #636e72;
  --shadow-soft: 0 4px 20px rgba(45, 52, 54, 0.08);
  --shadow-hover: 0 8px 30px rgba(45, 52, 54, 0.15);
  --radius: 20px;
  --radius-sm: 12px;
  --font-display: "Fredoka", "Segoe UI", sans-serif;
  --font-body: "Nunito", "Segoe UI", sans-serif;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Decorative background blobs */
body::before,
body::after {
  content: "";
  position: fixed;
  border-radius: 50%;
  z-index: -1;
  opacity: 0.35;
  pointer-events: none;
}

body::before {
  width: 400px;
  height: 400px;
  background: var(--color-sun);
  top: -100px;
  right: -100px;
}

body::after {
  width: 300px;
  height: 300px;
  background: var(--color-sky);
  bottom: -80px;
  left: -80px;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-coral);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  z-index: 200;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* Navigation */
.site-header {
  background: var(--color-bg-alt);
  box-shadow: var(--shadow-soft);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-coral);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.logo:hover {
  color: var(--color-orange);
}

.logo-icon {
  font-size: 1.75rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s, color 0.2s;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: var(--color-sun);
  color: var(--color-text);
  outline: none;
}

.nav-links a.active {
  background: var(--color-sky);
  color: white;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--color-sky);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
}

/* Main content */
main {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

/* Hero section */
.hero {
  text-align: center;
  padding: 2rem 0 3rem;
}

.hero-badge {
  display: inline-block;
  background: var(--color-sun);
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--color-coral);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--color-text-muted);
  max-width: 540px;
  margin: 0 auto 2rem;
}

.hero-wave {
  font-size: 2.5rem;
  display: inline-block;
  animation: wave 2s ease-in-out infinite;
  transform-origin: 70% 70%;
}

@keyframes wave {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(20deg); }
  75% { transform: rotate(-10deg); }
}

/* Section cards grid */
.section-intro {
  text-align: center;
  margin-bottom: 2rem;
}

.section-intro h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.section-intro p {
  color: var(--color-text-muted);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border: 3px solid transparent;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  border-radius: var(--radius) var(--radius) 0 0;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  outline: none;
}

.card--puzzles::before { background: var(--color-purple); }
.card--games::before { background: var(--color-green); }
.card--code::before { background: var(--color-sky); }
.card--tools::before { background: var(--color-coral); }
.card--scores::before { background: var(--color-sun); }
.card--science::before { background: var(--color-sun); }
.card--ai::before { background: var(--color-purple); }
.card--soon::before { background: var(--color-orange); }

.card--puzzles:hover { border-color: var(--color-purple); }
.card--games:hover { border-color: var(--color-green); }
.card--code:hover { border-color: var(--color-sky); }
.card--tools:hover { border-color: var(--color-coral); }
.card--scores:hover { border-color: var(--color-sun); }
.card--science:hover { border-color: var(--color-sun); }
.card--ai:hover { border-color: var(--color-purple); }
.card--soon { cursor: default; opacity: 0.85; }
.card--soon:hover { transform: none; box-shadow: var(--shadow-soft); border-color: transparent; }

.card-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  line-height: 1;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--color-text-muted);
  font-size: 1rem;
}

.card-tag {
  margin-top: 1rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-text-muted);
}

.card--puzzles .card-tag { background: #ede9fe; color: #7c3aed; }
.card--games .card-tag { background: #dcfce7; color: #16a34a; }
.card--code .card-tag { background: #ccfbf1; color: #0d9488; }
.card--tools .card-tag { background: #ffe3e3; color: #d64545; }
.card--scores .card-tag { background: #fff4c9; color: #a37a00; }
.card--science .card-tag { background: #fff4c9; color: #a37a00; }
.card--ai .card-tag { background: #ede9fe; color: #7c3aed; }
.card--soon .card-tag { background: #ffedd5; color: #ea580c; }

/* Coming soon page */
.coming-soon {
  text-align: center;
  padding: 3rem 1rem;
  max-width: 520px;
  margin: 0 auto;
}

.coming-soon-icon {
  font-size: 5rem;
  margin-bottom: 1.5rem;
  display: block;
  animation: bounce 2s ease infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.coming-soon h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  color: var(--color-coral);
  margin-bottom: 1rem;
}

.coming-soon p {
  color: var(--color-text-muted);
  font-size: 1.15rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
  background: var(--color-coral);
  color: white;
  box-shadow: 0 4px 0 #e55555;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #e55555;
  outline: none;
}

.btn-primary:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #e55555;
}

/* Footer */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 2px dashed var(--color-sun);
  padding: 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.site-footer strong {
  color: var(--color-coral);
  font-family: var(--font-display);
}

/* Screen-reader-only text */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.btn-secondary {
  background: var(--color-sky);
  color: white;
  box-shadow: 0 4px 0 var(--color-sky-dark);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--color-sky-dark);
  outline: none;
}

.btn-secondary:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 var(--color-sky-dark);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Responsive */
@media (max-width: 640px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg-alt);
    flex-direction: column;
    padding: 1rem;
    box-shadow: var(--shadow-soft);
    border-top: 1px solid #eee;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    width: 100%;
    text-align: center;
    padding: 0.75rem 1rem;
  }

  .site-header {
    position: relative;
  }

  .hero {
    padding: 1rem 0 2rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }
}