/**
 * Main Styles
 * Global styles for Nexus Platform
 */

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

:root {
  --primary-color: #0f766e;
  --secondary-color: #164e63;
  --accent-color: #ea580c;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --bg-color: #07111f;
  --text-color: #dbe7ff;
  --border-color: #23374f;
  --card-bg: #0d2036;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  --transition: all 0.3s ease;
}

html,
body {
  overflow-x: hidden;
}

body {
  font-family:
    "Plus Jakarta Sans", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background:
    radial-gradient(
      circle at 10% 20%,
      rgba(15, 118, 110, 0.22),
      transparent 40%
    ),
    radial-gradient(
      circle at 90% 15%,
      rgba(234, 88, 12, 0.14),
      transparent 35%
    ),
    linear-gradient(145deg, #060f1d 0%, #101d34 55%, #1f2b58 100%);
  color: var(--text-color);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--secondary-color);
}

/* ===== Navigation Bar ===== */
.navbar {
  backdrop-filter: blur(10px);
  background: rgba(9, 23, 40, 0.86);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.navbar-container {
  max-width: 1400px;
  width: 95%;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: nowrap;
}

.navbar-brand {
  flex-shrink: 0;
  white-space: nowrap;
}

.navbar-brand h1 {
  font-size: 1.5rem;
  letter-spacing: 0.3px;
  background: linear-gradient(135deg, var(--primary-color), #67e8f9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
}

.navbar-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  justify-content: center;
}

.navbar-menu li {
  white-space: nowrap;
}

.navbar-menu a {
  color: var(--text-color);
  transition: var(--transition);
  font-size: 1rem;
}

.navbar-menu a:hover {
  color: #67e8f9;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
  white-space: nowrap;
}

.role-badge {
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: bold;
}

.role-badge.admin {
  background-color: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
}

.role-badge.teacher {
  background-color: rgba(59, 130, 246, 0.2);
  color: #93c5fd;
}

.role-badge.student {
  background-color: rgba(16, 185, 129, 0.2);
  color: #a7f3d0;
}

#settingsLink {
  cursor: pointer;
}

/* ===== Buttons ===== */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  display: inline-block;
  text-align: center;
}

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

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
  background-color: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

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

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.9;
  color: transparent !important;
}

.btn-loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin-top: -10px;
  margin-left: -10px;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cg stroke='%23ffffff' stroke-width='10' stroke-linecap='round'%3E%3Cline x1='60' y1='10' x2='60' y2='30' opacity='1'/%3E%3Cline x1='85' y1='16.7' x2='75' y2='34' opacity='0.9'/%3E%3Cline x1='103.3' y1='35' x2='86' y2='45' opacity='0.8'/%3E%3Cline x1='110' y1='60' x2='90' y2='60' opacity='0.7'/%3E%3Cline x1='103.3' y1='85' x2='86' y2='75' opacity='0.6'/%3E%3Cline x1='85' y1='103.3' x2='75' y2='86' opacity='0.5'/%3E%3Cline x1='60' y1='110' x2='60' y2='90' opacity='0.4'/%3E%3Cline x1='35' y1='103.3' x2='45' y2='86' opacity='0.3'/%3E%3Cline x1='16.7' y1='85' x2='34' y2='75' opacity='0.2'/%3E%3Cline x1='10' y1='60' x2='30' y2='60' opacity='0.1'/%3E%3Cline x1='16.7' y1='35' x2='34' y2='45' opacity='0.1'/%3E%3Cline x1='35' y1='16.7' x2='45' y2='34' opacity='0.1'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 100%;
  animation: ios-spinner 1s steps(12, end) infinite;
}

@keyframes ios-spinner {
  100% {
    transform: rotate(360deg);
  }
}

.button-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background-color: rgba(30, 41, 59, 0.5);
  color: var(--text-color);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-large {
  max-width: 600px;
  margin: 2rem auto;
}

/* ===== Messages ===== */
.message {
  padding: 1rem;
  border-radius: 6px;
  margin: 1rem 0;
  text-align: center;
  display: none;
}

.message.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.2);
  color: #a7f3d0;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.message.error {
  display: block;
  background-color: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.message.info {
  display: block;
  background-color: rgba(59, 130, 246, 0.2);
  color: #93c5fd;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* ===== Loading & Errors ===== */
.loading {
  text-align: center;
  padding: 4rem 0;
  font-size: 1.1rem;
  color: var(--primary-color);
  font-weight: 500;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.loading::before {
  content: "";
  display: block;
  width: 32px;
  height: 32px;
  background-color: var(--primary-color);
  -webkit-mask-image: url("data:image/svg+xml;charset=utf-8,%3Csvg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cg stroke='%23fff' stroke-width='10' stroke-linecap='round'%3E%3Cline x1='60' y1='10' x2='60' y2='30' opacity='1'/%3E%3Cline x1='85' y1='16.7' x2='75' y2='34' opacity='0.9'/%3E%3Cline x1='103.3' y1='35' x2='86' y2='45' opacity='0.8'/%3E%3Cline x1='110' y1='60' x2='90' y2='60' opacity='0.7'/%3E%3Cline x1='103.3' y1='85' x2='86' y2='75' opacity='0.6'/%3E%3Cline x1='85' y1='103.3' x2='75' y2='86' opacity='0.5'/%3E%3Cline x1='60' y1='110' x2='60' y2='90' opacity='0.4'/%3E%3Cline x1='35' y1='103.3' x2='45' y2='86' opacity='0.3'/%3E%3Cline x1='16.7' y1='85' x2='34' y2='75' opacity='0.2'/%3E%3Cline x1='10' y1='60' x2='30' y2='60' opacity='0.1'/%3E%3Cline x1='16.7' y1='35' x2='34' y2='45' opacity='0.1'/%3E%3Cline x1='35' y1='16.7' x2='45' y2='34' opacity='0.1'/%3E%3C/g%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml;charset=utf-8,%3Csvg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cg stroke='%23fff' stroke-width='10' stroke-linecap='round'%3E%3Cline x1='60' y1='10' x2='60' y2='30' opacity='1'/%3E%3Cline x1='85' y1='16.7' x2='75' y2='34' opacity='0.9'/%3E%3Cline x1='103.3' y1='35' x2='86' y2='45' opacity='0.8'/%3E%3Cline x1='110' y1='60' x2='90' y2='60' opacity='0.7'/%3E%3Cline x1='103.3' y1='85' x2='86' y2='75' opacity='0.6'/%3E%3Cline x1='85' y1='103.3' x2='75' y2='86' opacity='0.5'/%3E%3Cline x1='60' y1='110' x2='60' y2='90' opacity='0.4'/%3E%3Cline x1='35' y1='103.3' x2='45' y2='86' opacity='0.3'/%3E%3Cline x1='16.7' y1='85' x2='34' y2='75' opacity='0.2'/%3E%3Cline x1='10' y1='60' x2='30' y2='60' opacity='0.1'/%3E%3Cline x1='16.7' y1='35' x2='34' y2='45' opacity='0.1'/%3E%3Cline x1='35' y1='16.7' x2='45' y2='34' opacity='0.1'/%3E%3C/g%3E%3C/svg%3E");
  -webkit-mask-size: 100%;
  mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  animation: ios-spinner 1s steps(12, end) infinite;
}

/* Global Fullscreen Loading Overlay */
.global-loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(7, 17, 31, 0.9);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.global-loading-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.global-loading-overlay .loading-dots {
  width: 48px;
  height: 48px;
  background-color: white;
  -webkit-mask-image: url("data:image/svg+xml;charset=utf-8,%3Csvg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cg stroke='%23fff' stroke-width='10' stroke-linecap='round'%3E%3Cline x1='60' y1='10' x2='60' y2='30' opacity='1'/%3E%3Cline x1='85' y1='16.7' x2='75' y2='34' opacity='0.9'/%3E%3Cline x1='103.3' y1='35' x2='86' y2='45' opacity='0.8'/%3E%3Cline x1='110' y1='60' x2='90' y2='60' opacity='0.7'/%3E%3Cline x1='103.3' y1='85' x2='86' y2='75' opacity='0.6'/%3E%3Cline x1='85' y1='103.3' x2='75' y2='86' opacity='0.5'/%3E%3Cline x1='60' y1='110' x2='60' y2='90' opacity='0.4'/%3E%3Cline x1='35' y1='103.3' x2='45' y2='86' opacity='0.3'/%3E%3Cline x1='16.7' y1='85' x2='34' y2='75' opacity='0.2'/%3E%3Cline x1='10' y1='60' x2='30' y2='60' opacity='0.1'/%3E%3Cline x1='16.7' y1='35' x2='34' y2='45' opacity='0.1'/%3E%3Cline x1='35' y1='16.7' x2='45' y2='34' opacity='0.1'/%3E%3C/g%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml;charset=utf-8,%3Csvg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cg stroke='%23fff' stroke-width='10' stroke-linecap='round'%3E%3Cline x1='60' y1='10' x2='60' y2='30' opacity='1'/%3E%3Cline x1='85' y1='16.7' x2='75' y2='34' opacity='0.9'/%3E%3Cline x1='103.3' y1='35' x2='86' y2='45' opacity='0.8'/%3E%3Cline x1='110' y1='60' x2='90' y2='60' opacity='0.7'/%3E%3Cline x1='103.3' y1='85' x2='86' y2='75' opacity='0.6'/%3E%3Cline x1='85' y1='103.3' x2='75' y2='86' opacity='0.5'/%3E%3Cline x1='60' y1='110' x2='60' y2='90' opacity='0.4'/%3E%3Cline x1='35' y1='103.3' x2='45' y2='86' opacity='0.3'/%3E%3Cline x1='16.7' y1='85' x2='34' y2='75' opacity='0.2'/%3E%3Cline x1='10' y1='60' x2='30' y2='60' opacity='0.1'/%3E%3Cline x1='16.7' y1='35' x2='34' y2='45' opacity='0.1'/%3E%3Cline x1='35' y1='16.7' x2='45' y2='34' opacity='0.1'/%3E%3C/g%3E%3C/svg%3E");
  -webkit-mask-size: 100%;
  mask-size: 100%;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  animation: ios-spinner 1s steps(12, end) infinite;
  margin-bottom: 2rem;
}

.global-loading-overlay .loading-text {
  font-size: 1.2rem;
  color: var(--text-color);
  font-weight: 500;
}

.error-message {
  background-color: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid rgba(239, 68, 68, 0.3);
  margin: 2rem;
}

/* ===== Home Page ===== */
.home-page {
  padding-top: 2rem;
}

.hero-section {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.1),
    rgba(118, 75, 162, 0.1)
  );
  margin: 2rem;
  border-radius: 12px;
}

.hero-section h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-section p {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1rem !important;
  color: #cbd5e1;
}

.features-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  padding: 3rem 2rem;
}

.feature {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.feature:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
}

.feature h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* ===== Auth Pages ===== */
.auth-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 200px);
  padding: 2rem;
}

.auth-card {
  background-color: var(--card-bg);
  padding: 3rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
}

.auth-card h2 {
  margin-bottom: 2rem;
  text-align: center;
  font-size: 1.8rem;
}

.auth-form {
  margin-bottom: 1.5rem;
}

.auth-link {
  text-align: center;
  margin-top: 1rem;
}

.auth-link a {
  color: var(--primary-color);
  font-weight: 500;
}

/* ===== Courses Page ===== */
.courses-page {
  padding: 2rem;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.page-header h2 {
  font-size: 2rem;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.course-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
}

.course-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.course-info {
  padding: 1.5rem;
}

.course-info h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.instructor {
  color: var(--primary-color);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.description {
  color: #cbd5e1;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.course-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.price {
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--success-color);
}

.level {
  background-color: rgba(102, 126, 234, 0.2);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
}

.no-courses {
  text-align: center;
  padding: 3rem;
  color: #cbd5e1;
}

/* ===== Course Detail Page ===== */
.course-detail-page {
  padding: 2rem;
}

.course-header {
  display: flex;
  gap: 2rem;
  margin-bottom: 3rem;
}

.course-header img {
  width: 40%;
  max-width: 500px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.course-header-info {
  flex: 1;
}

.course-header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.course-stats {
  display: flex;
  gap: 1.5rem;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}

.course-stats span {
  color: #cbd5e1;
}

.course-content {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.course-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.course-content ul {
  list-style-position: inside;
  margin-left: 1rem;
}

/* ===== Dashboard ===== */
.dashboard {
  padding: 2rem;
}

.dashboard h2 {
  margin-bottom: 2rem;
  font-size: 2rem;
}

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

.dashboard-card {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
}

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

.dashboard-card h3 {
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.dashboard-card p {
  color: #cbd5e1;
  margin-bottom: 1.5rem;
}

/* ===== Profile Page ===== */
.profile-page {
  padding: 2rem;
}

.profile-card {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  max-width: 600px;
  margin: 2rem auto;
}

.profile-card h2 {
  margin-bottom: 2rem;
}

.profile-form {
  margin-bottom: 2rem;
}

.change-password-section {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

/* ===== My Courses Page ===== */
.my-courses-page {
  padding: 2rem;
}

.courses-table {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin-top: 2rem;
}

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

.courses-table th {
  background-color: rgba(102, 126, 234, 0.1);
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

.courses-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.courses-table tr:hover {
  background-color: rgba(102, 126, 234, 0.05);
}

.status {
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
}

.status.published {
  background-color: rgba(16, 185, 129, 0.2);
  color: #a7f3d0;
}

.status.draft {
  background-color: rgba(100, 116, 139, 0.2);
  color: #cbd5e1;
}

.status.completed {
  background-color: rgba(16, 185, 129, 0.2);
  color: #a7f3d0;
}

.status.active {
  background-color: rgba(59, 130, 246, 0.2);
  color: #93c5fd;
}

/* ===== Create Course Page ===== */
.create-course-page {
  padding: 2rem;
}

.create-course-page h2 {
  text-align: center;
  margin-bottom: 2rem;
}

/* ===== My Enrollments Page ===== */
.my-enrollments-page {
  padding: 2rem;
}

.my-enrollments-page h2 {
  margin-bottom: 2rem;
}

.enrollments-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.enrollment-card {
  background-color: var(--card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.enrollment-card h3 {
  margin-bottom: 0.5rem;
}

.enrollment-meta {
  display: flex;
  justify-content: space-between;
  color: #cbd5e1;
  font-size: 0.9rem;
  margin: 1rem 0;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: rgba(102, 126, 234, 0.1);
  border-radius: 10px;
  overflow: hidden;
  margin: 1rem 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  transition: width 0.3s ease;
}

/* ===== Payment Page ===== */
.payment-page {
  padding: 2rem;
}

.payment-table {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin-top: 2rem;
}

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

.payment-table th {
  background-color: rgba(102, 126, 234, 0.1);
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

.payment-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.payment-table tr:hover {
  background-color: rgba(102, 126, 234, 0.05);
}

/* ===== Footer ===== */
.footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  text-align: center;
  padding: 2rem;
  margin-top: auto;
  width: 100%;
  color: #cbd5e1;
}

/* ===== App Container ===== */
.app-container {
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  flex: 1 0 auto;
}

/* ===== Admin Hub ===== */
.admin-hub {
  padding: 2rem;
}

.admin-hub-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.admin-kicker {
  color: #67e8f9;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.4rem;
}

.admin-subtitle {
  color: #9fb6d4;
  max-width: 620px;
}

.admin-user-chip {
  background: linear-gradient(
    135deg,
    rgba(15, 118, 110, 0.18),
    rgba(103, 232, 249, 0.12)
  );
  border: 1px solid rgba(103, 232, 249, 0.35);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  min-width: 220px;
}

.admin-user-chip span {
  display: block;
  font-size: 0.75rem;
  color: #9fb6d4;
}

.admin-user-chip strong {
  color: #ecfeff;
  word-break: break-word;
}

.admin-hub-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.admin-card {
  text-align: left;
  border: 1px solid rgba(103, 232, 249, 0.16);
  background: linear-gradient(
    165deg,
    rgba(13, 32, 54, 0.96) 0%,
    rgba(8, 21, 38, 0.9) 100%
  );
}

.admin-card:hover {
  transform: translateY(-6px);
  border-color: rgba(103, 232, 249, 0.4);
}

/* ===== Settings ===== */
.settings-page {
  padding: 2rem;
}

.settings-hero {
  margin-bottom: 1.5rem;
}

.settings-hero p {
  color: #9fb6d4;
}

.settings-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.2rem;
}

.settings-card {
  background: linear-gradient(
    170deg,
    rgba(13, 32, 54, 0.95),
    rgba(7, 17, 31, 0.94)
  );
  border: 1px solid rgba(103, 232, 249, 0.22);
  border-radius: 14px;
  padding: 1.4rem;
}

.settings-list {
  display: grid;
  gap: 0.8rem;
  margin: 1rem 0 1.25rem;
}

.settings-list div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px dashed rgba(159, 182, 212, 0.2);
  padding-bottom: 0.45rem;
}

.settings-list span {
  color: #9fb6d4;
  font-size: 0.9rem;
}

.settings-list strong {
  color: #ecfeff;
  text-align: right;
}

.settings-security-card {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.settings-muted {
  color: #9fb6d4;
  margin-bottom: 0.2rem;
}

.settings-logout-btn {
  margin-top: auto;
}

.not-found {
  text-align: center;
  padding: 4rem 2rem;
}

.not-found h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.not-found p {
  margin-bottom: 2rem;
  color: #cbd5e1;
}

/* ===== Highlight Input Groups ===== */
.highlight-input-group {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  align-items: center;
}

.highlight-input {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background-color: rgba(30, 41, 59, 0.5);
  color: var(--text-color);
  font-size: 1rem;
  transition: var(--transition);
}

.highlight-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

.btn-danger:hover {
  background-color: #dc2626;
  transform: translateY(-2px);
}

#highlightsContainer {
  margin-bottom: 1rem;
}

/* ===== Admin Pages ===== */
.admin-approve-courses-page {
  padding: 2rem;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 1rem;
}

.page-header h2 {
  font-size: 2rem;
  margin: 0;
}

.page-header p {
  color: #cbd5e1;
  margin-top: 0.5rem;
}

.courses-approval-list {
  display: grid;
  gap: 2rem;
}

.course-approval-card {
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  transition: var(--transition);
}

.course-approval-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

.course-approval-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.course-approval-header h3 {
  margin: 0;
  font-size: 1.5rem;
}

.course-approval-details {
  margin-bottom: 1.5rem;
}

.course-approval-details p {
  margin: 0.75rem 0;
  color: #cbd5e1;
  line-height: 1.6;
}

.highlights-section {
  margin-top: 1rem;
  padding: 1rem;
  background-color: rgba(102, 126, 234, 0.1);
  border-radius: 6px;
}

.highlights-section ul {
  list-style-position: inside;
  margin-left: 0;
  padding-left: 1rem;
}

.highlights-section li {
  margin: 0.5rem 0;
  color: #cbd5e1;
}

.course-approval-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

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

.btn-success:hover {
  background-color: #059669;
  transform: translateY(-2px);
}

.status-badge {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
}

.status-badge.draft {
  background-color: rgba(100, 116, 139, 0.2);
  color: #cbd5e1;
}

.status-badge.published {
  background-color: rgba(16, 185, 129, 0.2);
  color: #a7f3d0;
}

.no-data-message {
  text-align: center;
  padding: 3rem;
  background-color: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  color: #cbd5e1;
}

/* ===== Admin Payments Page ===== */
.admin-payments-page {
  padding: 2rem;
}

.payment-management-container {
  margin-top: 2rem;
}

.payment-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  padding: 1.5rem;
  border-radius: 12px;
  color: white;
  text-align: center;
}

.stat-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 0.95rem;
  font-weight: 500;
  opacity: 0.9;
}

.stat-card p {
  margin: 0;
  font-size: 2rem;
  font-weight: bold;
}

.payments-table {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin-top: 2rem;
}

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

.payments-table th {
  background-color: rgba(102, 126, 234, 0.1);
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

.payments-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.payments-table tr:hover {
  background-color: rgba(102, 126, 234, 0.05);
}

/* ===== Modal Styles ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
}

.modal-content {
  background-color: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-color);
  max-width: 500px;
  width: 90%;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  margin: 0;
  font-size: 1.5rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-color);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  line-height: 1;
}

.modal-close:hover {
  color: var(--primary-color);
}

.payment-modal {
  max-width: 500px;
}

.payment-modal .modal-header h2,
.payment-modal label {
  color: #0f172a;
}

.payment-modal input {
  color: #0f172a;
  background: #ffffff;
  border: 1px solid #cbd5e1;
}

.payment-modal input::placeholder {
  color: #64748b;
}

.payment-modal input[readonly] {
  background: #eef2ff;
  color: #0f172a;
  cursor: not-allowed;
}

.payment-modal form {
  padding: 2rem;
}

.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.form-actions .btn {
  flex: 1;
  padding: 0.75rem;
}

.form-group small {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: #334155;
}

/* ===== Course Status Separation ===== */
.courses-section-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 2rem 0 1rem 0;
  font-size: 1.2rem;
  font-weight: 600;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
}

.courses-section-header.approved {
  color: #a7f3d0;
  border-bottom-color: rgba(16, 185, 129, 0.3);
}

.courses-section-header.pending {
  color: #fbbf24;
  border-bottom-color: rgba(245, 158, 11, 0.3);
}

.empty-section {
  text-align: center;
  padding: 2rem;
  color: #cbd5e1;
  background: rgba(102, 126, 234, 0.05);
  border-radius: 8px;
  border: 1px dashed var(--border-color);
}

.brand-stud {
  color: #ba76d4; /* metallic purple */
  -webkit-text-fill-color: #ba76d4;
  text-shadow:
    0 0 12px rgba(186, 118, 212, 0.4),
    1px 1px 2px rgba(0, 0, 0, 0.8);
  font-weight: 800;
}
.brand-bridge {
  color: #2eb464; /* emerald green */
  -webkit-text-fill-color: #2eb464;
  text-shadow:
    0 0 12px rgba(46, 180, 100, 0.4),
    1px 1px 2px rgba(0, 0, 0, 0.8);
  font-weight: 800;
}

/* Smooth page transitions for improved UI/UX */
#app > div {
  animation: fadeInSoft 0.4s ease-in-out forwards;
}

@keyframes fadeInSoft {
  0% {
    opacity: 0;
    transform: translateY(8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}