/* Modern, Premium Variables */
:root {
  --primary: #0ea5e9; /* Light blue tech vibe */
  --primary-hover: #0284c7;
  --bg-dark: #0f172a; /* Slate 900 */
  --bg-darker: #020617; /* Slate 950 */
  --card-bg: rgba(30, 41, 59, 0.7); /* Glassmorphism base */
  --card-border: rgba(255, 255, 255, 0.1);
  --text-light: #f8fafc;
  --text-muted: #94a3b8;
  --gradient: linear-gradient(135deg, #0ea5e9 0%, #3b82f6 100%);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-darker);
  color: var(--text-light);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

main {
  flex: 1;
}

/* Typography elements */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

/* Glassmorphism Header */
.techclick-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  padding: 1rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-brand {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-light);
  position: relative;
}

.nav-links a:hover {
  color: var(--primary);
}

.btn-primary {
  background: var(--gradient);
  color: white;
  padding: 0.6rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.4);
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  padding: 0.6rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  border: 1px solid var(--primary);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-outline:hover {
  background: rgba(14, 165, 233, 0.1);
  transform: translateY(-2px);
}

/* Footer Section */
.techclick-footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--card-border);
  padding: 3rem 5% 2rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--text-light);
}

.footer-col p, .footer-col a {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  display: block;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--card-border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Utility Animations */
@keyframes fadeInSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}
.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Layout Utilities */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Hero Section */
.hero {
  padding: 8rem 5% 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Background Glow Effect */
.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(14,165,233,0.15) 0%, rgba(0,0,0,0) 70%);
  transform: translate(-50%, -50%);
  z-index: -1;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* UI Card Styling */
.glass-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  padding: 4rem 5%;
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: inline-block;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Categories Section */
.page-header {
  text-align: center;
  padding: 4rem 5% 2rem;
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  padding: 2rem 5% 5rem;
}

.category-card {
  text-align: left;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.category-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.category-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.category-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(14, 165, 233, 0.1);
  color: var(--primary);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: 0.5px;
}

/* Auth Cards */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 80vh;
  padding: 2rem;
}

.auth-card {
  width: 100%;
  max-width: 450px;
  text-align: center;
}

.auth-card h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.auth-card p {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--text-light);
}

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text-light);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.2);
}

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.divider::before, .divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--card-border);
}

.divider:not(:empty)::before { margin-right: 1em; }
.divider:not(:empty)::after { margin-left: 1em; }

.guest-btn {
  width: 100%;
  justify-content: center;
}

/* Contact Page */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  padding: 2rem 5% 5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-info h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.info-icon {
  background: rgba(14, 165, 233, 0.1);
  color: var(--primary);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.info-text h4 {
  margin-bottom: 0.25rem;
}

.info-text p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* Hide on mobile for simplicity in this demo, would add hamburger naturally */
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .contact-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}


.btn-available {
  background: transparent;
  color: #10b981;
  padding: 0.6rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  border: 1px solid #10b981;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
}

.btn-available:hover {
  background: rgba(16, 185, 129, 0.1);
  transform: translateY(-2px);
}

.btn-upcoming {
  background: transparent;
  color: #f59e0b;
  padding: 0.6rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  border: 1px solid #f59e0b;
  cursor: not-allowed;
  opacity: 0.8;
  transition: all 0.2s;
  display: inline-block;
}