/* 
 * Attendr - UTM Smart Attendance System
 * Design Theme: UTM Universiti Teknologi Malaysia
 * Primary Colors: Maroon (#8B1538) and Gold (#F4A900)
 */

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

/* ==================== CSS VARIABLES ==================== */
:root {
  /* UTM Brand Colors */
  --color-utm-maroon: #8B1538;
  --color-utm-maroon-dark: #6B0F2A;
  --color-utm-maroon-light: #A01D45;
  --color-utm-gold: #F4A900;
  --color-utm-gold-dark: #D49000;
  --color-utm-gold-light: #FFB820;

  /* Semantic Colors */
  --color-primary: var(--color-utm-maroon);
  --color-primary-dark: var(--color-utm-maroon-dark);
  --color-primary-light: var(--color-utm-maroon-light);
  --color-accent: var(--color-utm-gold);
  --color-accent-dark: var(--color-utm-gold-dark);
  --color-accent-light: var(--color-utm-gold-light);

  /* UI Colors */
  --color-success: #10B981;
  --color-error: #EF4444;
  --color-warning: #F59E0B;
  --color-info: #3B82F6;

  /* Neutral Colors */
  --color-bg: #0F0A15;
  --color-bg-secondary: #1A1425;
  --color-surface: rgba(139, 21, 56, 0.1);
  --color-surface-hover: rgba(139, 21, 56, 0.2);
  --color-text: #F9FAFB;
  --color-text-muted: #D1D5DB;
  --color-border: rgba(244, 169, 0, 0.2);

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

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* ==================== RESET & BASE ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #0F0A15 0%, #1A1425 50%, #0F0A15 100%);
  background-attachment: fixed;
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* UTM Pattern Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(139, 21, 56, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(244, 169, 0, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ==================== TYPOGRAPHY ==================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Outfit', 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h1 {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--color-utm-maroon) 0%, var(--color-utm-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

/* ==================== LAYOUT ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

/* ==================== NAVIGATION ==================== */
.navbar {
  background: rgba(15, 10, 21, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--color-utm-gold);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(139, 21, 56, 0.3);
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  font-family: 'Outfit', sans-serif;
  font-size: 1.75rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-utm-maroon) 0%, var(--color-utm-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.navbar-brand:hover {
  transform: scale(1.05);
}

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

.navbar-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-utm-gold);
  transition: width var(--transition-fast);
}

.navbar-link:hover {
  color: var(--color-utm-gold);
}

.navbar-link:hover::after {
  width: 80%;
}

/* ==================== GLASS CARD ==================== */
.glass-card {
  background: rgba(26, 20, 37, 0.7);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow:
    0 8px 32px rgba(139, 21, 56, 0.2),
    inset 0 1px 0 rgba(244, 169, 0, 0.1);
  transition: all var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow:
    0 12px 40px rgba(139, 21, 56, 0.3),
    inset 0 1px 0 rgba(244, 169, 0, 0.2);
  border-color: rgba(244, 169, 0, 0.4);
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-utm-maroon) 0%, var(--color-utm-maroon-dark) 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(139, 21, 56, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-utm-maroon-light) 0%, var(--color-utm-maroon) 100%);
  box-shadow: 0 6px 20px rgba(139, 21, 56, 0.6);
  transform: translateY(-2px);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--color-utm-gold) 0%, var(--color-utm-gold-dark) 100%);
  color: var(--color-utm-maroon-dark);
  box-shadow: 0 4px 15px rgba(244, 169, 0, 0.4);
}

.btn-secondary:hover {
  background: linear-gradient(135deg, var(--color-utm-gold-light) 0%, var(--color-utm-gold) 100%);
  box-shadow: 0 6px 20px rgba(244, 169, 0, 0.6);
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, var(--color-success) 0%, #059669 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-success:hover {
  background: linear-gradient(135deg, #10B981 0%, var(--color-success) 100%);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: var(--color-utm-gold);
  color: var(--color-utm-maroon-dark);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==================== FORMS ==================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-utm-gold);
}

.form-input,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(26, 20, 37, 0.6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-utm-gold);
  box-shadow: 0 0 0 3px rgba(244, 169, 0, 0.1);
  background: rgba(26, 20, 37, 0.8);
}

.form-select option {
  background: #1A1425;
  color: var(--color-text);
}

/* ==================== BADGES ==================== */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: rgba(139, 21, 56, 0.2);
  color: var(--color-utm-gold);
  border: 1px solid var(--color-utm-gold);
}

.badge-success {
  background: rgba(16, 185, 129, 0.2);
  color: var(--color-success);
  border-color: var(--color-success);
}

.badge-error {
  background: rgba(239, 68, 68, 0.2);
  color: var(--color-error);
  border-color: var(--color-error);
}

/* ==================== CODE DISPLAY ==================== */
.code-display {
  font-family: 'Courier New', monospace;
  font-size: 4rem;
  font-weight: 800;
  text-align: center;
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-utm-maroon) 0%, var(--color-utm-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1rem;
  text-shadow: 0 0 30px rgba(244, 169, 0, 0.5);
}

/* ==================== UTILITIES ==================== */
.text-center {
  text-align: center;
}

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

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

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.hidden {
  display: none !important;
}

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.gap-1 {
  gap: var(--spacing-sm);
}

.gap-2 {
  gap: var(--spacing-md);
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ==================== LOADING & OVERLAYS ==================== */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 10, 21, 0.9);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(244, 169, 0, 0.2);
  border-top-color: var(--color-utm-gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ==================== ALERTS ==================== */
.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  border-left: 4px solid;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--color-error);
  color: #FCA5A5;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--color-success);
  color: #6EE7B7;
}

/* ==================== VIDEO & MEDIA ==================== */
.video-container {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--color-utm-gold);
}

.video-preview {
  width: 100%;
  height: auto;
  display: block;
}

/* ==================== STATUS BADGES ==================== */
.status-badge {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: rgba(26, 20, 37, 0.6);
}

.status-info {
  border-color: var(--color-utm-gold);
  background: rgba(244, 169, 0, 0.1);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .navbar-nav {
    gap: var(--spacing-sm);
    font-size: 0.875rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .code-display {
    font-size: 2.5rem;
    letter-spacing: 0.5rem;
  }
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

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

.glass-card {
  animation: fadeIn 0.5s ease-out;
}