:root {
  color-scheme: light;
  --bg: #f8eef6;
  --surface: #ffffff;
  --text: #3f303e;
  --muted: #756b74;
  --primary: #7d5979;
  --primary-text: #ffffff;
  --soft: #ead7e7;
  --border: #d6bed1;
  --danger: #9e3f53;
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: linear-gradient(135deg, #675166, #9c7b96); color: var(--text); }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.shell { width: min(100%, 820px); margin: auto; min-height: 100vh; padding: 24px 18px 48px; background: radial-gradient(circle at 10% 0%, #e5cade 0, transparent 28%), linear-gradient(180deg, #fcf8fb, #f3e5ef); box-shadow: 0 0 48px rgba(48, 30, 47, .25); }
.topbar, .brand, .section-head, .row, .file-row, .modal-head, .admin-actions { display: flex; align-items: center; }
.topbar, .section-head, .file-row, .modal-head, .admin-actions { justify-content: space-between; gap: 14px; }
.brand { gap: 10px; }
.mark, .icon { display: grid; place-items: center; background: var(--soft); color: var(--primary); border-radius: 14px; }
.mark { width: 44px; height: 44px; }
.brand-logo { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; border: 2px solid var(--soft); }
.icon { width: 42px; height: 42px; flex: 0 0 auto; }
h1, h2, h3, p { margin-top: 0; }
.muted { color: var(--muted); }
.hero { padding: 48px 2px 30px; }
.hero p { color: var(--muted); }
.quick-grid, .subject-grid, .admin-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.card { background: var(--surface); color: var(--text); border: 1px solid var(--border); border-radius: 20px; padding: 18px; box-shadow: 0 10px 30px color-mix(in srgb, var(--text) 7%, transparent); }
button.card { text-align: right; cursor: pointer; }
.quick-card { min-height: 130px; }
.quick-card .icon { margin-bottom: 16px; }
.section { padding: 34px 0; border-top: 1px solid var(--border); scroll-margin-top: 20px; }
.section-head { margin-bottom: 16px; }
.subject-card h3 { margin: 14px 0 4px; }
.subject-card p { margin: 0; color: var(--muted); }
.btn { border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 12px; padding: 10px 14px; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 7px; }
.btn:hover { background: var(--soft); }
.btn-primary { background: var(--primary); color: var(--primary-text); border-color: transparent; }
.btn-danger { color: var(--danger); }
.badge { display: inline-block; background: var(--soft); color: var(--text); border-radius: 999px; padding: 5px 10px; font-size: .82rem; }
.carousel { overflow: hidden; }
.track { display: flex; direction: ltr; transition: transform .4s ease; }
.slide { flex: 0 0 100%; direction: rtl; padding: 2px; }
.slider-controls { display: flex; align-items: center; justify-content: space-between; margin-top: 10px; }
.dots { display: flex; gap: 6px; }
.dot { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 99px; background: var(--border); }
.dot.active { width: 24px; background: var(--primary); }
.overlay { position: fixed; inset: 0; z-index: 50; padding: 30px 16px; display: grid; align-items: start; justify-items: center; overflow-y: auto; background: color-mix(in srgb, var(--bg) 72%, transparent); backdrop-filter: blur(12px); }
.overlay[hidden] { display: none; }
.modal { width: min(100%, 650px); margin-top: 4vh; }
.tour { text-align: center; padding: 34px 24px; }
.tour-art { font-size: 3rem; color: var(--primary); margin: 18px; }
.tour-logo { width: min(210px, 62vw); aspect-ratio: 16 / 9; object-fit: cover; border-radius: 18px; }
.tour-actions, .filters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tour-actions { justify-content: center; }
.file-list { margin-top: 18px; }
.file-row { padding: 14px 0; border-bottom: 1px solid var(--border); }
.file-info { min-width: 0; }
.file-info strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-info small { color: var(--muted); }
.empty { padding: 24px; text-align: center; color: var(--muted); }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 99px; z-index: 80; }
.toast[hidden] { display: none; }
.admin-shell { width: min(100%, 1040px); }
.login-shell { display: grid; place-items: center; }
.login-card { width: min(100%, 430px); text-align: center; }
.login-card .brand-logo { width: 92px; height: 92px; margin-bottom: 16px; }
[hidden] { display: none !important; }
.admin-grid { align-items: start; }
.form-group { display: grid; gap: 7px; margin-bottom: 12px; }
input, select, textarea { width: 100%; border: 1px solid var(--border); border-radius: 12px; padding: 11px 12px; background: var(--bg); color: var(--text); }
textarea { min-height: 110px; resize: vertical; }
.admin-list { display: grid; gap: 8px; margin-top: 14px; }
.admin-item { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; padding: 11px 0; border-bottom: 1px solid var(--border); }
.status { margin: 12px 0; color: var(--muted); }
@media (max-width: 600px) {
  .quick-grid, .subject-grid, .admin-grid { grid-template-columns: 1fr; }
  .shell { padding-inline: 13px; }
  .hero { padding-top: 34px; }
  .admin-actions { align-items: stretch; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .track { transition: none; } }