:root {
  color-scheme: light;
  --color-primary: #285dab;
  --color-secondary: #6da7da;
  --color-dark: #192a43;
  --color-accent: #f4ac52;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: var(--color-dark);
  --muted: #5c6b82;
  --primary: var(--color-primary);
  --primary-dark: var(--color-dark);
  --accent: var(--color-accent);
  --border: #e0e6ef;
  --shadow: 0 12px 30px rgba(25, 42, 67, 0.08);
}

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

body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo img {
  width: 54px;
  height: auto;
  display: block;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-text span {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 18px;
  font-weight: 500;
  flex-wrap: nowrap;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a:focus {
  background: rgba(109, 167, 218, 0.2);
  color: var(--primary);
}

.nav-links a.nav-active {
  color: var(--primary);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-dark);
}

.mobile-menu {
  position: fixed;
  inset: 0;
  background: rgba(25, 42, 67, 0.35);
  display: none;
  align-items: flex-start;
  justify-content: flex-end;
  z-index: 20;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu-panel {
  width: min(320px, 90vw);
  height: 100%;
  background: var(--surface);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.menu-close {
  align-self: flex-end;
  border: none;
  background: none;
  font-size: 1.6rem;
  color: var(--color-dark);
  cursor: pointer;
}

.no-scroll {
  overflow: hidden;
}

.hero {
  padding: 60px 0 40px;
}

.hero-card {
  background: linear-gradient(135deg, #285dab 0%, #6da7da 100%);
  color: #fff;
  border-radius: 24px;
  padding: 42px;
  box-shadow: var(--shadow);
}

.hero-card h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 16px;
}

.hero-card p {
  font-size: 1.1rem;
  max-width: 700px;
}

.section {
  padding: 48px 0;
}

.section-title {
  font-size: 1.6rem;
  margin-bottom: 18px;
}

.section-subtitle {
  color: var(--muted);
  margin-bottom: 24px;
}

.quick-links {
  display: grid;
  gap: 28px;
}

.quick-block {
  background: var(--surface);
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.quick-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.badge {
  background: rgba(109, 167, 218, 0.25);
  color: var(--color-dark);
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem;
}

.class-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(48px, 1fr));
  gap: 10px;
}

.class-button {
  background: var(--bg);
  border: 1px solid transparent;
  border-radius: 12px;
  text-align: center;
  padding: 12px 0;
  font-weight: 600;
  transition: all 0.2s ease;
}

.class-button:hover,
.class-button:focus {
  border-color: var(--primary);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.class-button.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

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

.info-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.info-card {
  background: var(--surface);
  padding: 22px;
  border-radius: 16px;
  border: 1px solid var(--border);
}

.info-card h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.listing {
  display: grid;
  gap: 14px;
}

.list-item {
  background: var(--surface);
  border-radius: 14px;
  padding: 16px 20px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: border 0.2s ease, transform 0.2s ease;
}

.list-item:hover {
  border-color: rgba(40, 93, 171, 0.4);
  transform: translateY(-2px);
}

.list-item strong {
  font-size: 1.1rem;
}

.list-controls {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.toggle-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
}

.toggle-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.class-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.breadcrumbs {
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumb-current {
  color: var(--primary);
  font-weight: 600;
}

.class-menu {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.class-menu-link {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.class-menu-link:hover,
.class-menu-link:focus {
  border-color: var(--primary);
  color: var(--primary-dark);
}

.class-menu-link.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.class-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.class-description {
  color: var(--muted);
  max-width: 760px;
}

.view-switch {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.items-list {
  display: grid;
  gap: 12px;
}

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

.items-text {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  line-height: 1.7;
  white-space: pre-wrap;
}

.items-list.grid-view {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.item-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 14px 16px;
  border-radius: 12px;
}

.notes {
  margin-top: 32px;
  background: var(--surface);
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 22px;
}

.notes h3 {
  margin-bottom: 12px;
}

.notes ul {
  padding-left: 20px;
  margin-bottom: 12px;
}

.nav-buttons {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 24px;
}

.nav-buttons a {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 12px;
  font-weight: 500;
}

.footer {
  margin-top: auto;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.footer a {
  color: var(--primary);
}

.footer-tagline {
  color: var(--muted);
  margin-bottom: 8px;
}

.tag {
  display: inline-block;
  background: var(--accent);
  color: #2f2f2f;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.services-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.service-card {
  background: var(--surface);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow);
}

.service-layout {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.service-panel {
  background: var(--surface);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-panel h2 {
  font-size: 1.2rem;
}

.service-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.service-hint {
  color: var(--muted);
  font-size: 0.9rem;
}

.service-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.service-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.service-input,
.service-textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 10px 12px;
  font-family: inherit;
  font-size: 0.95rem;
}

.service-textarea {
  resize: vertical;
}

.service-radio,
.service-checkbox {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  font-size: 0.9rem;
}

.service-summary {
  display: grid;
  gap: 8px;
}

.service-form {
  display: grid;
  gap: 12px;
}

.service-label {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
}

.table-wrap {
  overflow-x: auto;
}

.service-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.service-table th,
.service-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.history-list {
  display: grid;
  gap: 8px;
  padding-left: 0;
  list-style: none;
  margin-bottom: 12px;
}

.history-item {
  width: 100%;
  text-align: left;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 0.9rem;
}


.empty-state {
  text-align: center;
  padding: 32px;
  background: var(--surface);
  border-radius: 16px;
  border: 1px dashed var(--border);
  color: var(--muted);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .hero-card {
    padding: 28px;
  }

  .list-item {
    flex-direction: column;
    align-items: flex-start;
  }

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