/* Dark Purple Theme for Quiz System */

:root {
  --bg-dark: #0d0d0d;
  --bg-card: #1a1a2e;
  --bg-card-hover: #232342;
  --bg-input: #16162a;
  --purple-primary: #9b59b6;
  --purple-light: #b87fcf;
  --purple-dark: #7b3fa0;
  --purple-glow: rgba(155, 89, 182, 0.3);
  --accent-pink: #e056fd;
  --text-primary: #f5f5f5;
  --text-secondary: #a0a0a0;
  --text-muted: #6c6c6c;
  --border-color: #2d2d4a;
  --success: #2ecc71;
  --success-dark: #27ae60;
  --danger: #e74c3c;
  --danger-dark: #c0392b;
  --warning: #f39c12;
}

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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* Site Header */
.site-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 0;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  font-size: 1.8em;
}

.logo-text {
  font-size: 1.4em;
  font-weight: 700;
  background: linear-gradient(135deg, var(--purple-light), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 5px;
}

.main-nav a {
  padding: 10px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.3s ease;
  font-weight: 500;
}

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

.main-nav a.nav-admin {
  color: var(--accent-pink);
}

.main-nav a.nav-admin:hover {
  background: rgba(224, 86, 253, 0.15);
}

.header-user {
  display: flex;
  align-items: center;
  gap: 15px;
}

.user-name {
  color: var(--text-secondary);
  font-size: 0.95em;
}

.main-content {
  padding: 20px 0;
}

/* Mobile nav */
@media (max-width: 900px) {
  .header-container {
    flex-wrap: wrap;
  }

  .main-nav {
    order: 3;
    width: 100%;
    justify-content: center;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
    margin-top: 10px;
    flex-wrap: wrap;
  }

  .main-nav a {
    padding: 8px 12px;
    font-size: 0.9em;
  }
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text-primary);
  margin-bottom: 15px;
}

h1 {
  font-size: 2.5em;
  background: linear-gradient(135deg, var(--purple-light), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

a {
  color: var(--purple-light);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: var(--accent-pink);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  margin: 5px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.3s ease;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--purple-primary),
    var(--purple-dark)
  );
  color: white;
  box-shadow: 0 4px 15px var(--purple-glow);
}

.btn-primary:hover {
  background: linear-gradient(
    135deg,
    var(--purple-light),
    var(--purple-primary)
  );
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--purple-glow);
}

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

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

.btn-danger {
  background: linear-gradient(135deg, var(--danger), var(--danger-dark));
  color: white;
}

.btn-danger:hover {
  background: linear-gradient(135deg, #ff6b5b, var(--danger));
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, var(--success), var(--success-dark));
  color: white;
}

.btn-success:hover {
  background: linear-gradient(135deg, #4cd787, var(--success));
  transform: translateY(-2px);
}

.btn-admin {
  background: linear-gradient(
    135deg,
    var(--accent-pink),
    var(--purple-primary)
  );
  color: white;
  box-shadow: 0 4px 15px rgba(224, 86, 253, 0.3);
}

.btn-admin:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(224, 86, 253, 0.4);
}

.btn-small {
  padding: 6px 12px;
  font-size: 14px;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 15px;
  background: var(--bg-input);
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--purple-primary);
  box-shadow: 0 0 0 3px var(--purple-glow);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

/* Auth boxes (login, register) */
.login-box,
.register-box,
.admin-login-box {
  max-width: 450px;
  margin: 60px auto;
  padding: 40px;
  background: var(--bg-card);
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-color);
}

.login-box h1,
.register-box h1,
.admin-login-box h1 {
  text-align: center;
  margin-bottom: 30px;
}

.login-link,
.register-link,
.back-link {
  text-align: center;
  margin-top: 20px;
  color: var(--text-secondary);
}

/* Messages */
.error-message {
  background: rgba(231, 76, 60, 0.15);
  color: #ff6b5b;
  padding: 15px 20px;
  border-radius: 8px;
  margin-bottom: 20px;
  border: 1px solid rgba(231, 76, 60, 0.3);
}

.success-message {
  background: rgba(46, 204, 113, 0.15);
  color: #4cd787;
  padding: 15px 20px;
  border-radius: 8px;
  margin-bottom: 20px;
  border: 1px solid rgba(46, 204, 113, 0.3);
}

/* Hero section */
.hero-section {
  text-align: center;
  padding: 100px 20px;
  background: linear-gradient(135deg, #1a1a2e 0%, #16162a 50%, #0d0d0d 100%);
  color: white;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 30% 20%, var(--purple-glow) 0%, transparent 40%),
    radial-gradient(
      circle at 70% 80%,
      rgba(224, 86, 253, 0.2) 0%,
      transparent 40%
    );
  pointer-events: none;
}

.hero-section > * {
  position: relative;
  z-index: 1;
}

.hero-section h1 {
  font-size: 3.5em;
  margin-bottom: 20px;
  -webkit-text-fill-color: unset;
  background: none;
  color: white;
  text-shadow: 0 0 30px var(--purple-glow);
}

.hero-section p {
  font-size: 1.3em;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.button-group {
  margin: 40px 0;
}

.admin-link-section {
  margin-top: 30px;
}

.admin-link-small {
  color: var(--text-muted);
  font-size: 0.9em;
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.3s;
}

.admin-link-small:hover {
  opacity: 1;
  color: var(--text-secondary);
}

/* Dashboard */
.dashboard {
  padding: 20px 0;
}

.dashboard h1 {
  margin-bottom: 30px;
}

.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  margin: 20px 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

table th,
table td {
  padding: 15px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

table th {
  background: var(--bg-card-hover);
  font-weight: 600;
  color: var(--purple-light);
  text-transform: uppercase;
  font-size: 0.85em;
  letter-spacing: 0.5px;
}

table tr:last-child td {
  border-bottom: none;
}

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

/* Quiz cards */
.quiz-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 25px;
  margin: 30px 0;
}

.quiz-card {
  background: var(--bg-card);
  padding: 25px;
  border-radius: 16px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.quiz-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--purple-primary), var(--accent-pink));
}

.quiz-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
  border-color: var(--purple-primary);
}

.quiz-card h3 {
  margin-bottom: 12px;
  color: var(--purple-light);
  font-size: 1.3em;
}

.quiz-card p {
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.quiz-info {
  color: var(--text-muted);
  font-size: 0.9em;
}

.last-result {
  background: var(--bg-input);
  padding: 10px 15px;
  border-radius: 8px;
  margin: 15px 0;
  font-size: 0.9em;
  color: var(--success);
}

/* Question blocks */
.question-block {
  background: var(--bg-card);
  padding: 25px;
  margin: 25px 0;
  border-radius: 16px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
}

.question-block h3,
.question-title {
  color: var(--purple-light);
  margin-bottom: 15px;
}

.question-text {
  font-size: 1.25em;
  font-weight: 600;
  margin: 20px 0;
  color: var(--text-primary);
}

.answers {
  margin: 20px 0;
}

.answer-option {
  display: flex;
  align-items: center;
  padding: 15px 20px;
  margin: 10px 0;
  background: var(--bg-input);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.answer-option:hover {
  background: var(--bg-card-hover);
  border-color: var(--purple-primary);
}

.answer-option input[type="radio"] {
  width: 20px;
  height: 20px;
  margin-right: 15px;
  accent-color: var(--purple-primary);
}

.answer-option.correct {
  background: rgba(46, 204, 113, 0.15);
  border-color: var(--success);
}

.answer-option.incorrect {
  background: rgba(231, 76, 60, 0.15);
  border-color: var(--danger);
}

/* Quiz container */
.quiz-container {
  max-width: 800px;
  margin: 0 auto;
}

.quiz-container > h1 {
  text-align: center;
  margin-bottom: 10px;
}

.quiz-container > p {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

/* Form actions */
.form-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

/* Result page */
.result-container {
  max-width: 700px;
  margin: 40px auto;
  text-align: center;
}

.result-score {
  font-size: 4em;
  font-weight: 700;
  background: linear-gradient(135deg, var(--purple-light), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 30px 0;
}

.result-message {
  font-size: 1.5em;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

/* Leaderboard */
.leaderboard-container {
  max-width: 900px;
  margin: 0 auto;
}

.filter-form {
  display: flex;
  gap: 15px;
  align-items: center;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.filter-form select {
  padding: 10px 15px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 15px;
}

.filter-form select:focus {
  outline: none;
  border-color: var(--purple-primary);
}

.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9em;
}

.rank-1 {
  background: linear-gradient(135deg, #ffd700, #ffb700);
  color: #000;
}

.rank-2 {
  background: linear-gradient(135deg, #c0c0c0, #a0a0a0);
  color: #000;
}

.rank-3 {
  background: linear-gradient(135deg, #cd7f32, #b06c2a);
  color: #fff;
}

/* Footer */
.site-footer {
  margin-top: 50px;
  padding: 30px 20px;
  text-align: center;
  color: var(--text-muted);
}

.admin-link-small {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9em;
  transition: color 0.3s;
}

.admin-link-small:hover {
  color: var(--purple-light);
}

/* Stats cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.stat-card {
  background: var(--bg-card);
  padding: 25px;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border-color);
}

.stat-value {
  font-size: 2.5em;
  font-weight: 700;
  color: var(--purple-light);
  margin-bottom: 5px;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95em;
}

/* Admin panel */
.admin-panel,
.admin-section {
  background: var(--bg-card);
  padding: 30px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  margin-top: 20px;
}

.admin-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin: 25px 0;
}

.stat-card {
  background: var(--bg-input);
  padding: 25px;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border-color);
}

.stat-value {
  font-size: 2.5em;
  font-weight: 700;
  background: linear-gradient(135deg, var(--purple-light), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--text-secondary);
  margin-top: 10px;
  font-size: 0.95em;
}

.action-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.btn-admin {
  background: linear-gradient(
    135deg,
    var(--accent-pink),
    var(--purple-primary)
  );
  color: white;
}

.btn-admin:hover {
  background: linear-gradient(
    135deg,
    var(--purple-primary),
    var(--accent-pink)
  );
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(224, 86, 253, 0.4);
}

/* Badges */
.badge-admin,
.badge-user {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.8em;
  font-weight: 600;
}

.badge-admin {
  background: linear-gradient(
    135deg,
    var(--accent-pink),
    var(--purple-primary)
  );
  color: white;
}

.badge-user {
  background: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--purple-primary);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2.2em;
  }

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

  table {
    font-size: 14px;
  }

  table th,
  table td {
    padding: 10px 12px;
  }

  .login-box,
  .register-box,
  .admin-login-box {
    margin: 30px 15px;
    padding: 25px;
  }

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

  .action-buttons .btn {
    width: 100%;
  }

  .form-actions {
    flex-direction: column;
    gap: 15px;
  }

  .form-actions .btn {
    width: 100%;
  }

  h1 {
    font-size: 1.8em;
  }
}

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

.quiz-card,
.question-block,
.stat-card {
  animation: fadeIn 0.5s ease forwards;
}

.quiz-card:nth-child(1) {
  animation-delay: 0.1s;
}
.quiz-card:nth-child(2) {
  animation-delay: 0.2s;
}
.quiz-card:nth-child(3) {
  animation-delay: 0.3s;
}
.quiz-card:nth-child(4) {
  animation-delay: 0.4s;
}