/* ===================================
   FUTURISTIC ISLAMIC MATHEMATICAL THEME
   =================================== */

:root {
  --primary-color: #60e0ff;
  --secondary-color: #7c5cff;
  --accent-color: #ff8fb3;
  --dark-bg: #08111f;
  --darker-bg: #04070f;
  --surface-bg: rgba(12, 20, 39, 0.96);
  --card-bg: rgba(14, 24, 48, 0.88);
  --border-color: rgba(96, 224, 255, 0.16);
  --text-primary: #eef6ff;
  --text-secondary: #a3b7d3;
  --muted: #7f9db8;
  --success-color: #5fe6ad;
  --warning-color: #f8b400;
  --danger-color: #ff6b92;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: radial-gradient(circle at 10% 10%, rgba(96, 224, 255, 0.12), transparent 24%),
              radial-gradient(circle at 92% 18%, rgba(255, 143, 179, 0.12), transparent 20%),
              linear-gradient(160deg, #040613 0%, #08111f 42%, #0e2040 100%);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 15%, rgba(96, 224, 255, 0.12), transparent 24%),
    radial-gradient(circle at 75% 80%, rgba(255, 143, 179, 0.10), transparent 18%);
  pointer-events: none;
  z-index: -1;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 42%, rgba(0, 0, 0, 0.08));
  pointer-events: none;
  z-index: -1;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  background: rgba(12, 19, 38, 0.96);
  border-bottom: 1px solid rgba(96, 224, 255, 0.14);
  padding: 1.75rem 0;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(14px);
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(96, 224, 255, 0.2), transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0 1.5rem;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.geometric-icon {
  font-size: 3rem;
  color: var(--primary-color);
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { text-shadow: 0 0 10px var(--primary-color); }
  50% { text-shadow: 0 0 30px var(--primary-color), 0 0 50px var(--primary-color); }
}

.header-logo h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 3px;
  text-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
  margin: 0;
}

.subheader {
  color: var(--text-secondary);
  font-size: 0.85rem;
  letter-spacing: 1px;
  margin: 0;
  text-transform: uppercase;
}

.tagline {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 300;
  letter-spacing: 1px;
  margin: 0;
  text-align: right;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  color: var(--primary-color);
  text-shadow: 0 0 15px rgba(0, 217, 255, 0.3);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; margin: 2rem 0 1rem; }
h3 { font-size: 1.5rem; }

/* Paragraphs */
p {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

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

.hero-copy {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1rem;
}

.hero h2 {
  font-size: 3rem;
  margin-top: 0;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 1rem auto 0;
}

.hero-actions {
  margin-top: 2rem;
  display: inline-flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.feature-card {
  background: rgba(14, 24, 48, 0.96);
  border: 1px solid rgba(96, 224, 255, 0.10);
  border-radius: 22px;
  padding: 1.75rem;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
}

.feature-card:hover {
  border-color: rgba(96, 224, 255, 0.24);
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  color: var(--primary-color);
  margin-top: 0;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
}

/* Cards grid */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  align-items: stretch;
  margin: 2rem 0;
}

.card {
  background: rgba(14, 24, 48, 0.96);
  border-radius: 24px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(96, 224, 255, 0.10);
}

.card:hover,
.card:focus {
  transform: translateY(-8px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.34);
}

.card.featured {
  border-color: rgba(96, 224, 255, 0.22);
  background: rgba(14, 24, 48, 0.99);
  box-shadow: 0 14px 44px rgba(0, 217, 255, 0.22);
}

.card.featured:hover {
  transform: translateY(-12px);
  box-shadow: 0 20px 50px rgba(0, 217, 255, 0.3);
}

.feature-highlights {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin: 1rem 0;
  padding: 1rem;
  background: rgba(0, 217, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.highlight {
  color: var(--success-color);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
}

.card-icon {
  font-size: 4rem;
}

.main-card h2 {
  color: var(--primary-color);
  margin: 0;
  font-size: 1.8rem;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
}

.card-subtext {
  color: var(--text-secondary);
  font-size: 0.85rem;
  opacity: 0.8;
  margin: 0;
}

/* Info Section */
.info-section {
  background: rgba(8, 14, 29, 0.92);
  border: 1px solid rgba(96, 224, 255, 0.12);
  border-radius: 24px;
  padding: 2rem;
  margin: 2rem 0 3rem;
  backdrop-filter: blur(14px);
}

.info-section h3 {
  margin-top: 0;
  margin-bottom: 1rem;
}

.info-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0;
}

/* Buttons */
button,
.btn,
.btn-primary,
.btn-secondary {
  border: none;
  border-radius: 999px;
  padding: 0.95rem 2rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: #07101d;
  box-shadow: 0 12px 30px rgba(96, 224, 255, 0.22);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(96, 224, 255, 0.28);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(96, 224, 255, 0.08);
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
  border-top: 2px solid var(--border-color);
  margin-top: 4rem;
  font-size: 0.85rem;
}

.footer-inner p {
  margin: 0.5rem 0;
}

/* Meta row */
.meta-row {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

.date {
  text-align: center;
  color: var(--primary-color);
  font-size: 0.95rem;
  text-shadow: 0 0 10px rgba(0, 217, 255, 0.3);
}

/* Responsive */
@media (max-width: 1024px) {
  .feature-card {
    padding: 1.3rem;
  }

  .cards {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 0 1.5rem;
  }

  .tagline {
    text-align: center;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .hero {
    padding: 2rem 0;
  }

  .container {
    padding: 1rem;
  }

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

  .feature-card {
    padding: 1rem;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.2rem; }

  .btn-primary {
    width: 100%;
  }

  .info-section {
    padding: 1.5rem;
    margin: 2rem 0;
  }
}

@media (max-width: 480px) {
  .header-logo {
    gap: 1rem;
  }

  .geometric-icon {
    font-size: 2.5rem;
  }

  .header-logo h1 {
    font-size: 2rem;
    letter-spacing: 2px;
  }

  .subheader {
    font-size: 0.75rem;
  }

  .tagline {
    font-size: 0.85rem;
  }

  .hero h2 {
    font-size: 1.5rem;
  }

  .description {
    font-size: 1rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .feature-card {
    padding: 1rem;
  }

  .feature-icon {
    font-size: 2.5rem;
  }

  .card {
    padding: 1.5rem;
  }

  .card-icon {
    font-size: 3rem;
  }

  .main-card h2 {
    font-size: 1.5rem;
  }

  .btn-primary {
    padding: 0.8rem 1.5rem;
    font-size: 0.95rem;
  }
}

/* Utility classes */
hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2rem 0;
}