/* ACM Recruitment Portal - Premium Dark Theme */
/* Million Dollar Aesthetic */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Poppins:wght@400;500;600;700;800&display=swap');

/* CSS Variables */
:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-glass: rgba(255, 255, 255, 0.05);

  --acm-blue: #0085CA;
  --acm-blue-light: #00a8ff;
  --acm-blue-dark: #006ba3;
  --acm-gradient: linear-gradient(135deg, #0085CA 0%, #00c6ff 100%);
  --accent-glow: 0 0 30px rgba(0, 133, 202, 0.3);

  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7a;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 133, 202, 0.3);

  --success: #00d97e;
  --warning: #f6c343;
  --error: #e63757;
  --info: #39afd1;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(0, 133, 202, 0.2);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background Effects */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(0, 133, 202, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(0, 198, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
  font-size: 1.25rem;
}

.gradient-text {
  background: var(--acm-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  position: relative;
  z-index: 1;
}

.container-sm {
  max-width: 600px;
}

.container-lg {
  max-width: 1400px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

.navbar.scrolled {
  padding: var(--space-sm) 0;
  background: rgba(10, 10, 15, 0.95);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.nav-brand img {
  height: 40px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--acm-gradient);
  transition: var(--transition-normal);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-user img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition-normal);
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: var(--acm-gradient);
  color: white;
  box-shadow: var(--shadow-md), 0 0 20px rgba(0, 133, 202, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 133, 202, 0.4);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--acm-blue);
}

.btn-outline {
  background: transparent;
  color: var(--acm-blue);
  border: 2px solid var(--acm-blue);
}

.btn-outline:hover {
  background: var(--acm-blue);
  color: white;
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-danger {
  background: var(--error);
  color: white;
}

.btn-warning {
  background: var(--warning);
  color: var(--bg-primary);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: 0.8rem;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  backdrop-filter: blur(10px);
  transition: var(--transition-normal);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.card-text {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

/* Glass Card */
.glass-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
}

/* Department Cards */
.dept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
}

.dept-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  position: relative;
}

.dept-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--acm-gradient);
  transform: scaleX(0);
  transition: var(--transition-normal);
}

.dept-card:hover::before {
  transform: scaleX(1);
}

.dept-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.dept-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.dept-card-body {
  padding: var(--space-lg);
}

.dept-card-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.dept-card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.dept-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.badge-open {
  background: rgba(0, 217, 126, 0.2);
  color: var(--success);
  border: 1px solid rgba(0, 217, 126, 0.3);
}

.badge-upcoming {
  background: rgba(246, 195, 67, 0.2);
  color: var(--warning);
  border: 1px solid rgba(246, 195, 67, 0.3);
}

.badge-ended {
  background: rgba(230, 55, 87, 0.2);
  color: var(--error);
  border: 1px solid rgba(230, 55, 87, 0.3);
}

.badge-pending {
  background: rgba(57, 175, 209, 0.2);
  color: var(--info);
  border: 1px solid rgba(57, 175, 209, 0.3);
}

.badge-accepted {
  background: rgba(0, 217, 126, 0.2);
  color: var(--success);
  border: 1px solid rgba(0, 217, 126, 0.3);
}

.badge-rejected {
  background: rgba(230, 55, 87, 0.2);
  color: var(--error);
  border: 1px solid rgba(230, 55, 87, 0.3);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: var(--space-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--acm-blue);
  box-shadow: 0 0 0 3px rgba(0, 133, 202, 0.2);
}

.form-control::placeholder {
  color: var(--text-muted);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0a0b0' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: var(--space-2xl);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

select.form-control option {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--space-sm);
}

.form-error {
  color: var(--error);
  font-size: 0.85rem;
  margin-top: var(--space-xs);
}

/* Progress Bar */
.progress {
  height: 8px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--acm-gradient);
  border-radius: var(--radius-full);
  transition: var(--transition-normal);
}

.progress-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: var(--space-md);
  text-align: left;
}

th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

td {
  border-top: 1px solid var(--border-color);
}

tr:hover td {
  background: var(--bg-card);
}

/* Flash Messages */
.flash-messages {
  position: fixed;
  top: 80px;
  right: var(--space-lg);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  animation: slideIn 0.3s ease;
  max-width: 400px;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(20px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.alert-success {
  background: rgba(0, 217, 126, 0.2);
  color: var(--success);
  border: 1px solid var(--success);
}

.alert-error {
  background: rgba(230, 55, 87, 0.2);
  color: var(--error);
  border: 1px solid var(--error);
}

.alert-warning {
  background: rgba(246, 195, 67, 0.2);
  color: var(--warning);
  border: 1px solid var(--warning);
}

.alert-info {
  background: rgba(57, 175, 209, 0.2);
  color: var(--info);
  border: 1px solid var(--info);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  padding-top: calc(80px + var(--space-3xl));
  position: relative;
}

.hero-content {
  max-width: 800px;
}

.hero h1 {
  margin-bottom: var(--space-lg);
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Hero Capsule */
.hero-capsule {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: rgba(0, 133, 202, 0.15);
  border: 1px solid rgba(0, 133, 202, 0.3);
  border-radius: var(--radius-full);
  color: var(--acm-blue-light);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  margin-bottom: var(--space-xl);
  transition: var(--transition-normal);
}

.hero-capsule:hover {
  background: rgba(0, 133, 202, 0.25);
  border-color: var(--acm-blue);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 133, 202, 0.2);
}

.capsule-icon {
  font-size: 1rem;
}

.capsule-arrow {
  font-size: 0.8rem;
  opacity: 0.7;
  transition: var(--transition-fast);
}

.hero-capsule:hover .capsule-arrow {
  opacity: 1;
  transform: translateX(2px);
}

/* Membership Button */
.btn-membership {
  background: linear-gradient(135deg, #f6c343 0%, #e6a832 50%, #d4951a 100%);
  color: #1a1a1a;
  font-weight: 700;
  box-shadow: var(--shadow-md), 0 0 20px rgba(246, 195, 67, 0.3);
}

.btn-membership:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(246, 195, 67, 0.4);
}

.btn-membership svg {
  stroke-width: 2.5;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-xl) 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: var(--transition-normal);
}

.stat-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--acm-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  color: var(--text-secondary);
  margin-top: var(--space-sm);
}

/* Page Layout */
.page {
  min-height: 100vh;
  padding-top: 100px;
  padding-bottom: var(--space-3xl);
}

.page-header {
  margin-bottom: var(--space-2xl);
}

.page-title {
  margin-bottom: var(--space-sm);
}

.page-subtitle {
  color: var(--text-secondary);
}

/* Sidebar Layout (Admin) */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 200px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: var(--space-md);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 999;
}

.admin-content {
  flex: 1;
  margin-left: 200px;
  padding: var(--space-lg);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  padding: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  margin-bottom: var(--space-xs);
  font-size: 0.85rem;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: var(--bg-card);
  color: var(--text-primary);
}

.sidebar-nav a.active {
  background: linear-gradient(135deg, rgba(0, 133, 202, 0.2) 0%, rgba(0, 133, 202, 0.1) 100%);
  color: var(--acm-blue-light);
  border-left: 3px solid var(--acm-blue);
}

/* Admin Page Compact Styles */
.admin-layout h1,
.admin-layout .page-title {
  font-size: 1.5rem;
}

.admin-layout h3 {
  font-size: 1rem;
}

.admin-layout .page-subtitle {
  font-size: 0.85rem;
}

.admin-layout .glass-card {
  padding: var(--space-lg);
}

.admin-layout .card {
  padding: var(--space-lg);
}

.admin-layout .stat-card {
  padding: var(--space-md);
}

.admin-layout .stat-value {
  font-size: 1.75rem;
}

.admin-layout .stat-label {
  font-size: 0.8rem;
}

.admin-layout .stats-grid {
  gap: var(--space-md);
  padding: var(--space-md) 0;
}

.admin-layout th,
.admin-layout td {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
}

.admin-layout .form-control {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9rem;
}

.admin-layout .form-label {
  font-size: 0.85rem;
  margin-bottom: var(--space-xs);
}

.admin-layout .form-group {
  margin-bottom: var(--space-md);
}

.admin-layout .btn {
  font-size: 0.8rem;
  padding: var(--space-xs) var(--space-md);
}

.admin-layout .btn-lg {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.9rem;
}

.admin-layout .dept-grid {
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-md);
  padding: var(--space-md) 0;
}

.admin-layout .dept-card-img {
  height: 120px;
}

.admin-layout .dept-card-body {
  padding: var(--space-md);
}

.admin-layout .dept-card-title {
  font-size: 1rem;
}

.admin-layout .dept-card-desc {
  font-size: 0.8rem;
}

/* Countdown Timer */
.countdown {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  margin: var(--space-lg) 0;
}

.countdown-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  text-align: center;
  min-width: 80px;
}

.countdown-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--acm-blue-light);
}

.countdown-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Google Sign-In Button */
.google-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-xl);
  background: white;
  color: #333;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.google-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.google-btn svg {
  width: 24px;
  height: 24px;
}

/* Profile Completion */
.profile-completion {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.profile-completion.incomplete {
  border-color: var(--warning);
  background: rgba(246, 195, 67, 0.05);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-2xl) 0;
  text-align: center;
  color: var(--text-secondary);
}

.footer a {
  color: var(--acm-blue);
  text-decoration: none;
}

/* Utilities */
.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

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

.text-success {
  color: var(--success);
}

.text-error {
  color: var(--error);
}

.text-warning {
  color: var(--warning);
}

.mt-sm {
  margin-top: var(--space-sm);
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mt-xl {
  margin-top: var(--space-xl);
}

.mb-sm {
  margin-bottom: var(--space-sm);
}

.mb-md {
  margin-bottom: var(--space-md);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.mb-xl {
  margin-bottom: var(--space-xl);
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-sm {
  gap: var(--space-sm);
}

.gap-md {
  gap: var(--space-md);
}

.gap-lg {
  gap: var(--space-lg);
}

.hidden {
  display: none;
}

/* Mobile Overlay */
.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 997;
  backdrop-filter: blur(4px);
}

.mobile-overlay.active {
  display: block;
}

/* Mobile auth visibility */
.mobile-auth {
  display: none;
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-normal);
}

.hamburger.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Responsive */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    padding: 80px var(--space-lg) var(--space-lg);
    gap: var(--space-sm);
    z-index: 998;
    overflow-y: auto;
    transition: right 0.3s ease;
  }

  .nav-links.mobile-open {
    right: 0;
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: var(--space-md);
    text-align: left;
    border-radius: var(--radius-md);
    background: transparent;
    font-size: 1rem;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links a:hover {
    background: var(--bg-card);
  }

  .nav-links a::after {
    display: none;
  }

  .nav-user {
    display: none !important;
  }

  .mobile-auth {
    display: block;
  }

  .admin-sidebar {
    transform: translateX(-100%);
  }

  .admin-content {
    margin-left: 0;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .stat-card {
    padding: var(--space-md);
  }

  .stat-value {
    font-size: 1.75rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    width: 100%;
    padding: 0 var(--space-md);
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 280px;
  }

  .hero h1 {
    font-size: 1.5rem;
    line-height: 1.3;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .hero-capsule {
    font-size: 0.8rem;
    padding: var(--space-xs) var(--space-md);
  }

  .glass-card {
    padding: var(--space-lg);
  }

  .container {
    padding: 0 var(--space-md);
  }

  .page {
    padding-top: 80px;
  }

  .nav-brand {
    font-size: 1.1rem;
  }

  .nav-brand img {
    height: 28px;
  }

  /* Mobile CTA section fixes */
  .section-standard {
    padding: 2rem 0;
  }

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

  /* Countdown timer mobile */
  .countdown {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .countdown-item {
    min-width: 60px;
    padding: var(--space-sm) var(--space-md);
  }

  .countdown-value {
    font-size: 1.1rem;
  }

  .countdown-label {
    font-size: 0.65rem;
  }

  .feature-card {
    padding: 1.25rem;
  }
}

/* Animations */
@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.7;
  }
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* Checkbox switch */
.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 26px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: var(--transition-normal);
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 2px;
  bottom: 2px;
  background-color: var(--text-secondary);
  border-radius: 50%;
  transition: var(--transition-normal);
}

input:checked+.switch-slider {
  background: var(--acm-gradient);
  border-color: var(--acm-blue);
}

input:checked+.switch-slider:before {
  transform: translateX(24px);
  background-color: white;
}