:root {
  color-scheme: light;
  font-family: "Poppins", "Inter", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --gradient-start: #7656ff;
  --gradient-end: #a24dff;
  --gradient-accent: #53d9ff;
  --bg-layer: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.15), transparent 55%),
    radial-gradient(circle at 80% 0%, rgba(255, 255, 255, 0.08), transparent 50%),
    linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  --surface: rgba(255, 255, 255, 0.12);
  --surface-strong: rgba(255, 255, 255, 0.25);
  --surface-card: rgba(255, 255, 255, 0.18);
  --border-soft: rgba(255, 255, 255, 0.25);
  --border-strong: rgba(255, 255, 255, 0.45);
  --text-primary: #f7f7ff;
  --text-muted: rgba(250, 250, 255, 0.75);
  --text-contrast: #20143c;
  --shadow-soft: 0 20px 80px rgba(24, 8, 54, 0.35);
  --shadow-focus: 0 10px 40px rgba(97, 64, 255, 0.45);
  --blur: 16px;
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-pill: 999px;
  --transition: 0.25s ease;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg-layer);
  color: var(--text-primary);
  font-family: inherit;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

img {
  max-width: 100%;
  display: block;
}

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

a:hover {
  color: #c3e8ff;
}

.page-shell {
  width: min(1200px, 92vw);
  margin: 0 auto;
  padding: 48px 0 64px;
}

.neo-hero {
  position: relative;
  padding: 56px clamp(24px, 6vw, 64px);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(var(--blur));
  overflow: hidden;
}

.neo-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(118, 86, 255, 0.35), rgba(255, 255, 255, 0.05));
  mix-blend-mode: screen;
  pointer-events: none;
}

.neo-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
}

.neo-hero p {
  margin: 0;
  font-size: 18px;
  color: var(--text-muted);
}

.neo-hero .pill-strip {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid var(--border-soft);
  font-size: 14px;
  color: var(--text-primary);
}

.glass-panel {
  margin-top: 36px;
  padding: clamp(24px, 3vw, 36px);
  border-radius: var(--radius-lg);
  background: var(--surface);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
  color: var(--text-primary);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 24px;
}

.section-heading h2 {
  margin: 0;
  font-size: 24px;
}

.section-heading p {
  margin: 0;
  color: var(--text-muted);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px;
}

.stat-card {
  padding: 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-soft);
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--text-primary);
}

.stat-card span.label {
  font-size: 14px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

.stat-card strong {
  font-size: 40px;
  font-weight: 700;
}

.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.subject-card {
  position: relative;
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  box-shadow: var(--shadow-soft);
  text-align: center;
  font-weight: 600;
  color: var(--text-primary);
  transition: transform var(--transition), box-shadow var(--transition);
}

.subject-card .icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.26);
  display: grid;
  place-items: center;
  font-size: 24px;
  color: #fff;
}

.subject-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.25), transparent 65%);
  opacity: 0;
  transition: opacity var(--transition);
}

.subject-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-focus);
}

.subject-card:hover::after {
  opacity: 1;
}

.subject-card small {
  display: block;
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 13px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: var(--radius-pill);
  border: none;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn-primary {
  background: linear-gradient(120deg, #9e7bff, #5dd8ff);
  color: #1b1236;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-focus);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.glass-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 22px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: var(--shadow-soft);
}

.glass-table thead {
  background: rgba(255, 255, 255, 0.18);
  color: var(--text-primary);
}

.glass-table th,
.glass-table td {
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 15px;
  color: var(--text-primary);
}

.glass-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.08);
}

.status-chip {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-weight: 600;
}

.status-active {
  background: rgba(34, 197, 94, 0.18);
  color: #5ef7ab;
}

.status-inactive {
  background: rgba(248, 113, 113, 0.18);
  color: #ffbaba;
}

.form-grid {
  display: grid;
  gap: 20px;
}

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

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(15, 0, 54, 0.35);
  color: #fff;
  font-size: 15px;
  outline: none;
  transition: border var(--transition), box-shadow var(--transition);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: #9fe0ff;
  box-shadow: 0 0 0 2px rgba(159, 224, 255, 0.5);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.28);
  font-size: 13px;
  color: var(--text-primary);
}

.table-wrapper {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-soft);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 13px;
}

.code-block {
  background: rgba(15, 0, 54, 0.45);
  border-radius: var(--radius-md);
  border: 1px solid rgba(233, 237, 255, 0.15);
  padding: 18px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 14px;
  overflow-x: auto;
}

.toast {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.14);
  box-shadow: var(--shadow-soft);
}

.lightbox,
.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(13, 4, 25, 0.65);
  backdrop-filter: blur(10px);
  z-index: 90;
}

.lightbox.active,
.modal.active {
  display: flex;
}

.modal-card {
  width: min(540px, 92vw);
  padding: 32px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: var(--shadow-soft);
}

@media (max-width: 768px) {
  .page-shell {
    width: min(100%, 94vw);
    padding-top: 32px;
  }
  .glass-panel {
    padding: 24px;
  }
  .neo-hero {
    padding: 40px 24px;
  }
}