/* Base Styles */
:root {
  --primary-color: #4361ee;
  --secondary-color: #3f37c9;
  --accent-color: #4cc9f0;
  --success-color: #4caf50;
  --warning-color: #ff9800;
  --danger-color: #f44336;
  --light-color: #f8f9fa;
  --dark-color: #212529;
  --gray-color: #6c757d;
  --light-gray: #e9ecef;
  --border-radius: 8px;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--dark-color);
  background-color: #f5f7fb;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header Styles */
header {
  background-color: var(--primary-color);
  color: white;
  padding: 20px 0;
  text-align: center;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  margin-bottom: 20px;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 5px;
}

header p {
  font-size: 1.2rem;
  opacity: 0.9;
}

/* Navigation Styles */
nav {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin-bottom: 30px;
}

nav ul {
  display: flex;
  list-style: none;
  justify-content: center;
}

nav ul li {
  position: relative;
}

nav ul li a {
  display: block;
  padding: 15px 25px;
  color: var(--dark-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

nav ul li a:hover {
  color: var(--primary-color);
  background-color: rgba(67, 97, 238, 0.05);
}

nav ul li a.active {
  color: var(--primary-color);
  border-bottom: 3px solid var(--primary-color);
}

nav ul li a i {
  margin-right: 8px;
}

/* Main Content Styles */
main {
  min-height: calc(100vh - 300px);
}

section {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 30px;
  margin-bottom: 30px;
}

section h2 {
  color: var(--dark-color);
  margin-bottom: 15px;
  font-size: 1.8rem;
}

section p {
  color: var(--gray-color);
  margin-bottom: 25px;
}

/* Hero Section */
.hero {
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 40px;
}

.hero-content {
  flex: 1;
}

.hero-content h2 {
  font-size: 2.2rem;
  margin-bottom: 15px;
  color: var(--dark-color);
}

.hero-content p {
  font-size: 1.1rem;
  margin-bottom: 30px;
  color: var(--gray-color);
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
}

.hero-image img {
  max-width: 100%;
  height: auto;
}

.cta-buttons {
  display: flex;
  gap: 15px;
}

/* Feature Cards */
.features {
  text-align: center;
}

.feature-cards {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 30px;
}

.card {
  flex: 1;
  background-color: white;
  border-radius: var(--border-radius);
  padding: 25px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
  border: 1px solid var(--light-gray);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--dark-color);
}

.card p {
  color: var(--gray-color);
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 1rem;
}

.btn i {
  margin-right: 8px;
}

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

.btn.primary:hover {
  background-color: var(--secondary-color);
}

.btn.secondary {
  background-color: var(--light-gray);
  color: var(--dark-color);
}

.btn.secondary:hover {
  background-color: #dde2e6;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Registration Page Styles */
.registration-container {
  display: flex;
  gap: 30px;
  flex-wrap: wrap;
}

.camera-container,
.form-container {
  flex: 1;
  min-width: 300px;
}

.video-container {
  position: relative;
  margin-bottom: 15px;
  border-radius: var(--border-radius);
  overflow: hidden;
  background-color: #000;
}

video,
canvas {
  width: 100%;
  height: auto;
  display: block;
  background-color: #000;
}

.camera-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
}

#captureStatus {
  margin-top: 10px;
  padding: 10px;
  border-radius: var(--border-radius);
  font-weight: 500;
}

/* Form Styles */
.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--dark-color);
}

input,
select {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--light-gray);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

/* Attendance Page Styles */
.attendance-container {
  display: flex;
  gap: 30px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.recognition-status {
  flex: 1;
  min-width: 300px;
}

.message-box {
  background-color: var(--light-gray);
  padding: 20px;
  border-radius: var(--border-radius);
  margin-bottom: 20px;
}

.student-info-box {
  background-color: #e8f5e9;
  padding: 20px;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--success-color);
}

.student-info-box h3 {
  color: var(--success-color);
  margin-bottom: 15px;
}

.student-details p {
  margin-bottom: 10px;
}

#face-detection-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Table Styles */
.table-container {
  overflow-x: auto;
  margin-bottom: 20px;
}

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

table th,
table td {
  padding: 12px 15px;
  text-align: left;
  border-bottom: 1px solid var(--light-gray);
}

table th {
  background-color: #f8f9fa;
  font-weight: 600;
  color: var(--dark-color);
}

table tbody tr:hover {
  background-color: rgba(67, 97, 238, 0.05);
}

/* Records Page Styles */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 25px;
  padding: 20px;
  background-color: #f8f9fa;
  border-radius: var(--border-radius);
}

.filter-group {
  flex: 1;
  min-width: 200px;
}

.date-range {
  display: flex;
  align-items: center;
  gap: 10px;
}

.date-range input {
  flex: 1;
}

.export-options {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 15px;
  margin-top: 20px;
}

#pageInfo {
  font-weight: 500;
}

/* Footer Styles */
footer {
  text-align: center;
  padding: 20px 0;
  color: var(--gray-color);
  margin-top: 30px;
}

/* Responsive Styles */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    padding: 30px;
  }

  .feature-cards {
    flex-direction: column;
  }

  nav ul {
    flex-wrap: wrap;
  }

  nav ul li {
    flex: 1;
    min-width: 120px;
    text-align: center;
  }

  .registration-container,
  .attendance-container {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 2rem;
  }

  section {
    padding: 20px;
  }

  .btn {
    padding: 8px 16px;
    font-size: 0.9rem;
  }

  .cta-buttons {
    flex-direction: column;
  }
}