/* ================================
   Modern Professional Theme v2.0
   ================================ */

:root {
  --primary: #111827;
  --primary-light: #374151;
  --accent: #0077ff;
  --accent-hover: #005fcc;
  --background: #f9fafb;
  --surface: #ffffff;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
  --shadow: 6px 6px 16px rgba(0, 0, 0, 0.05),
             -6px -6px 16px rgba(255, 255, 255, 0.6);
  --transition: 0.25s ease-in-out;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--background);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.6;
  scroll-behavior: smooth;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--primary);
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 0.5em;
}

h1 {
  font-size: 3rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.25rem;
}

p, ul, ol {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 1.2em;
}

/* Links */
a {
  color: var(--accent);
  text-decoration: none;
  position: relative;
  transition: color var(--transition);
}
a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}
a:hover::after {
  width: 100%;
}
a:hover {
  color: var(--accent-hover);
}

/* Header */
header {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border);
}

header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  height: 64px;
}

header .logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
}

.navbar-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text);
  cursor: pointer;
}

header nav ul {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
}

header nav ul li a {
  padding: 8px 16px;
  border-radius: var(--radius);
  color: var(--text);
  transition: background var(--transition);
}
header nav ul li a:hover,
header nav ul li a.active {
  background: var(--accent);
  color: #fff;
}

/* Main Grid Layout */
.main-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

/* Cards with Neumorphism */
.card, .program-card, .event-card, .blog-post {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid var(--border);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

/* Buttons */
.cta-button, .btn, button, input[type="submit"] {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  box-shadow: 0 2px 8px rgba(0, 119, 255, 0.12);
}
.cta-button:hover, .btn:hover, button:hover, input[type="submit"]:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}
button:active {
  transform: scale(0.97);
}
button:disabled {
  background: #ccc;
  color: #666;
  cursor: not-allowed;
}

/* Forms */
input, textarea {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  font-size: 1rem;
  width: 100%;
  box-sizing: border-box;
  background: #fefefe;
  transition: border var(--transition), box-shadow var(--transition);
}
input:focus, textarea:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 119, 255, 0.2);
}

/* Hero Section */
.hero-title {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 0.5em;
}
.hero-sub {
  font-size: 1.25rem;
  color: var(--text-light);
  max-width: 600px;
}

/* Glassmorphism Utility */
.glassbar {
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius);
  padding: 16px;
}

/* Footer */
footer {
  background: var(--surface);
  color: var(--text-light);
  text-align: center;
  padding: 32px 0;
  margin-top: 48px;
  font-size: 0.95rem;
  border-top: 1px solid var(--border);
  border-top-left-radius: var(--radius);
  border-top-right-radius: var(--radius);
}

/* Responsive Styles */
@media (max-width: 900px) {
  header nav {
    flex-direction: column;
    height: auto;
    padding: 12px 10px;
  }
  header nav ul {
    display: none;
    flex-direction: column;
    background: var(--surface);
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    z-index: 1001;
    padding: 0;
    margin: 0;
    border-top: 1px solid var(--border);
  }
  header nav ul.open {
    display: flex;
  }
  .navbar-toggle {
    display: block;
  }
  header nav ul li {
    width: 100%;
    text-align: left;
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 600px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.5rem; }
  .card, .program-card, .event-card {
    padding: 16px 12px;
  }
  .hero-title { font-size: 2rem; }
  .hero-sub { font-size: 1rem; }
  main {
    padding: 20px 10px;
  }
}