:root {
  --navy: #061B4F;
  --deep-navy: #03143A;
  --blue: #0874E8;
  --blue-2: #0B5FC6;
  --green: #05B957;
  --bg: #F7F9FC;
  --text: #172033;
  --muted: #667085;
  --border: #E4E7EC;
  --white: #FFFFFF;
  --shadow: 0 12px 30px rgba(6, 27, 79, 0.08);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-2); }
.text-navy { color: var(--navy); }
.btn { border-radius: 10px; font-weight: 700; }
.btn-primary { background: var(--blue); border-color: var(--blue); }
.btn-primary:hover { background: var(--blue-2); border-color: var(--blue-2); }
.btn-success { background: var(--green); border-color: var(--green); }
.btn-outline-primary { color: var(--blue); border-color: var(--blue); }
.btn-outline-primary:hover { background: var(--blue); border-color: var(--blue); }

.flash-wrap { position: fixed; top: 76px; left: 0; right: 0; z-index: 1040; pointer-events: none; }
.flash-wrap .alert { pointer-events: auto; max-width: 760px; margin-left: auto; }
.brand-logo {
  width: 42px;
  height: 42px;
  object-fit: cover;
  object-position: center top;
  border-radius: 10px;
}

.hero-section {
  background: var(--white);
  padding: 86px 0 64px;
  border-bottom: 1px solid var(--border);
}
.hero-section h1 { color: var(--navy); font-size: clamp(2.4rem, 6vw, 4.6rem); font-weight: 850; letter-spacing: 0; line-height: 1.02; }
.hero-section p { color: var(--muted); font-size: 1.18rem; max-width: 620px; }
.eyebrow { color: var(--blue); text-transform: uppercase; font-size: .78rem; font-weight: 800; letter-spacing: .08em; }
.hero-panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.hero-panel img {
  width: 180px;
  height: 180px;
  object-fit: cover;
  object-position: center top;
  border-radius: 14px;
  margin-bottom: 24px;
}
.hero-panel h2 { color: var(--navy); font-weight: 800; }

.section { padding: 56px 0; }
.section-heading { margin-bottom: 24px; }
.section-heading h1, .section-heading h2 { color: var(--navy); font-weight: 850; }
.narrow { max-width: 760px; }

.soft-card, .course-card, .stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.course-card { display: flex; flex-direction: column; overflow: hidden; }
.course-card.horizontal { flex-direction: row; min-height: 260px; }
.course-poster { width: 100%; aspect-ratio: 16/9; object-fit: cover; background: var(--bg); }
.course-card.horizontal .course-poster { width: 42%; aspect-ratio: auto; }
.course-card-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.course-card h3 { color: var(--navy); font-size: 1.2rem; font-weight: 800; }
.course-card p { color: var(--muted); }
.course-meta { list-style: none; padding: 0; margin: 0 0 18px; color: var(--muted); font-size: .92rem; }
.course-meta li { display: flex; gap: 8px; margin-bottom: 8px; }
.course-price {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 18px;
}
.price-current {
  color: var(--green);
  font-weight: 850;
  font-size: 1.15rem;
}
.price-original {
  color: var(--muted);
  text-decoration: line-through;
  font-weight: 700;
}
.detail-poster { width: 100%; border-radius: 14px; border: 1px solid var(--border); box-shadow: var(--shadow); background: var(--white); }

.info-grid { display: grid; grid-template-columns: minmax(120px, 1fr) 1.6fr; gap: 12px 18px; }
.info-grid span { color: var(--muted); }
.info-grid strong { color: var(--text); }
.registration-panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 30px;
  box-shadow: var(--shadow);
}
.form-section-title { color: var(--navy); font-weight: 800; margin: 18px 0 12px; }
.form-control, .form-select { border-color: var(--border); border-radius: 10px; min-height: 44px; }
.form-control:focus, .form-select:focus { border-color: var(--blue); box-shadow: 0 0 0 .2rem rgba(8, 116, 232, .12); }
.required-star { color: #DC3545; font-weight: 850; }
.password-field .password-toggle {
  border-color: var(--border);
  border-radius: 0 10px 10px 0;
  min-width: 48px;
}
.password-field .form-control { border-radius: 10px 0 0 10px; }
.selected-course { border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; color: var(--navy); background: var(--bg); font-weight: 800; }
.selected-course i, .success-icon { color: var(--green); }
.success-icon { font-size: 4rem; }

.login-page { min-height: calc(100vh - 125px); display: grid; place-items: center; padding: 40px 16px; }
.login-card {
  width: min(440px, 100%);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 34px;
  box-shadow: var(--shadow);
}
.login-card img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  object-position: center top;
  border-radius: 16px;
  margin-bottom: 24px;
}
.login-card h1 { color: var(--navy); font-weight: 850; margin-bottom: 20px; }

.student-shell { display: grid; grid-template-columns: 250px minmax(0, 1fr); min-height: calc(100vh - 73px); }
.student-nav {
  background: var(--white);
  border-right: 1px solid var(--border);
  padding: 26px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.student-nav img {
  width: 96px;
  height: 96px;
  object-fit: cover;
  object-position: center top;
  border-radius: 14px;
  margin-bottom: 16px;
}
.student-nav a, .sidebar-nav a, .sidebar-footer a {
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 700;
}
.student-nav a:hover, .sidebar-nav a:hover, .sidebar-footer a:hover { background: #EDF5FF; color: var(--blue); }
.student-content, .admin-content { padding: 28px; }
.page-heading { margin-bottom: 22px; }
.page-heading h1 { color: var(--navy); font-weight: 850; }
.page-heading p { color: var(--muted); margin: 0; }
.stat-value { color: var(--navy); font-size: 2rem; font-weight: 850; }
.stat-icon { color: var(--blue); font-size: 2rem; }
.status-component .badge { font-size: 1rem; padding: 10px 14px; }

.admin-shell { display: grid; grid-template-columns: 270px minmax(0, 1fr); min-height: 100vh; }
.admin-sidebar {
  background: var(--deep-navy);
  color: var(--white);
  min-height: 100vh;
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
}
.sidebar-brand { display: flex; align-items: center; gap: 10px; color: var(--white); font-weight: 850; margin-bottom: 28px; }
.sidebar-brand img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  object-position: center top;
  border-radius: 12px;
  background: var(--white);
}
.sidebar-nav { display: flex; flex-direction: column; gap: 6px; }
.sidebar-nav a, .sidebar-footer a { color: rgba(255,255,255,.86); }
.sidebar-nav a:hover, .sidebar-footer a:hover { background: rgba(255,255,255,.1); color: var(--white); }
.sidebar-footer { margin-top: auto; border-top: 1px solid rgba(255,255,255,.14); padding-top: 16px; }
.admin-main { min-width: 0; }
.admin-topbar {
  height: 70px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 28px;
}
.filter-bar { display: grid; grid-template-columns: repeat(4, minmax(160px, 1fr)) auto; gap: 10px; margin-bottom: 16px; }
.course-filter-bar {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(160px, .5fr) minmax(180px, .5fr) auto auto;
  gap: 10px;
  margin-bottom: 24px;
}
.search-form { width: min(360px, 100%); }
.table { --bs-table-bg: transparent; }
.table th { color: var(--muted); font-size: .82rem; text-transform: uppercase; }
.table-poster { width: 76px; height: 48px; object-fit: cover; border-radius: 8px; border: 1px solid var(--border); }
.action-cell { display: flex; flex-wrap: wrap; gap: 6px; }
.action-cell form { display: inline-flex; }
.empty-state { padding: 34px; color: var(--muted); }
.empty-state i { color: var(--blue); font-size: 2.4rem; }
.empty-state h3 { color: var(--navy); font-size: 1.2rem; font-weight: 800; margin-top: 10px; }
.footer { background: var(--white); }
.footer-social {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-social a {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--navy);
  background: var(--white);
  font-size: 1.1rem;
}
.footer-social a:hover {
  color: var(--white);
  background: var(--blue);
  border-color: var(--blue);
}
.favorite-btn {
  width: 44px;
  min-height: 44px;
  padding-inline: 0;
  flex: 0 0 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 991px) {
  .admin-shell { grid-template-columns: 1fr; }
  .admin-shell > .admin-sidebar { display: none; }
  .offcanvas .admin-sidebar { display: flex; width: 100%; }
  .student-shell { grid-template-columns: 1fr; }
  .student-nav { flex-direction: row; overflow-x: auto; align-items: center; }
  .student-nav img { width: 130px; margin: 0 12px 0 0; }
  .filter-bar { grid-template-columns: 1fr; }
  .course-filter-bar { grid-template-columns: 1fr; }
  .course-card.horizontal { flex-direction: column; }
  .course-card.horizontal .course-poster { width: 100%; aspect-ratio: 16/9; }
}

@media (max-width: 575px) {
  .hero-section { padding: 56px 0 42px; }
  .registration-panel, .login-card { padding: 22px; }
  .student-content, .admin-content { padding: 18px; }
  .info-grid { grid-template-columns: 1fr; gap: 4px; }
}