/* ===== Campus Talk Website - Dark Theme ===== */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg: #050508;
  --surface: #0E0E12;
  --surface-variant: #16161C;
  --primary: #1688E6;
  --primary-hover: #1470c4;
  --text-primary: #F5F5F5;
  --text-secondary: #8E8E8E;
  --text-tertiary: #555555;
  --divider: #1A1A22;
  --glass-border: rgba(255, 255, 255, 0.1);
  --green: #4BB543;
  --red: #dc2626;
  --radius: 12px;
  --max-width: 1100px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--primary-hover);
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 24px;
}
.navbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}
.navbar-brand img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
}
.navbar-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.navbar-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.navbar-links a:hover,
.navbar-links a.active {
  color: var(--text-primary);
}
.navbar-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.85rem;
  transition: background 0.2s;
}
.navbar-cta:hover {
  background: var(--primary-hover);
  color: #fff !important;
}

/* Mobile menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .navbar-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--glass-border);
  }
  .navbar-links.open { display: flex; }
}

/* ===== Hero ===== */
.hero {
  padding: 140px 24px 80px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(22, 136, 230, 0.12) 0%, transparent 60%);
}
.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--primary), #44b4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 540px;
  margin: 0 auto 32px;
}
.hero-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  color: #fff;
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* ===== Sections ===== */
.section {
  padding: 80px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}
.section-subtitle {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 48px;
  font-size: 1.05rem;
}

/* ===== Features Grid ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.3s, transform 0.2s;
}
.feature-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(22, 136, 230, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== Stats ===== */
.stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
  padding: 40px 24px;
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
}
.stat {
  text-align: center;
}
.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary);
}
.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* ===== Blog Cards ===== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.blog-card {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s, transform 0.2s;
}
.blog-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.blog-card-img {
  width: 100%;
  height: 180px;
  background: var(--surface-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}
.blog-card-body {
  padding: 24px;
}
.blog-tag {
  display: inline-block;
  background: rgba(22, 136, 230, 0.12);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}
.blog-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.blog-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}
.blog-meta {
  margin-top: 16px;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ===== CTA Banner ===== */
.cta-banner {
  text-align: center;
  padding: 60px 24px;
  background: var(--surface);
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
}
.cta-banner h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-banner p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 1.05rem;
}

/* ===== Footer ===== */
.footer {
  padding: 60px 24px 30px;
  border-top: 1px solid var(--divider);
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.footer-col a:hover {
  color: var(--text-primary);
}
.footer-bottom {
  max-width: var(--max-width);
  margin: 40px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .stats { gap: 30px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  .footer-inner { grid-template-columns: 1fr; }
}

/* ===== Policy / Content Pages ===== */
.page-header {
  padding: 120px 24px 40px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(22, 136, 230, 0.08) 0%, transparent 60%);
}
.page-header h1 {
  font-size: 2.4rem;
  font-weight: 700;
}
.page-header p {
  color: var(--text-secondary);
  margin-top: 8px;
}
.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}
.page-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.page-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
}
.page-content p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 0.95rem;
}
.page-content ul {
  margin: 0 0 16px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.page-content li {
  margin-bottom: 6px;
}
.page-content strong {
  color: var(--text-primary);
}
.page-content a {
  color: var(--primary);
}
.last-updated {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  margin-bottom: 32px;
}

/* ===== Forms (Account Deletion) ===== */
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}
.form-group textarea {
  min-height: 120px;
  resize: vertical;
}
.btn-danger {
  background: var(--red);
  color: #fff;
}
.btn-danger:hover {
  background: #b91c1c;
  color: #fff;
}

/* ===== Blog Page ===== */
.blog-hero {
  padding: 120px 24px 40px;
  text-align: center;
}
.blog-hero h1 {
  font-size: 2.4rem;
  font-weight: 700;
}
.blog-hero p {
  color: var(--text-secondary);
  margin-top: 8px;
}
.blog-article {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
}
.blog-article h2 {
  margin-top: 0;
}