:root {
  --miet-blue: #0b3d91;
  --miet-blue-dark: #062654;
  --miet-gold: #d4a017;
  --miet-text: #1a1a2e;
  --miet-muted: #5c6b8a;
  --accent: #0078d7;
  --acrylic: rgba(255, 255, 255, 0.72);
  --acrylic-nav: rgba(255, 255, 255, 0.45);
  --sidebar-w: 260px;
  --touch: 48px;
  font-family: "Segoe UI", "Segoe WP", Tahoma, sans-serif;
}

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

html, body { height: 100%; }

body {
  color: var(--miet-text);
  background: var(--miet-blue-dark) url("/static/images/college-bg.png") center/cover fixed no-repeat;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(6, 38, 84, 0.45);
  z-index: 0;
  pointer-events: none;
}

#app { position: relative; z-index: 1; min-height: 100vh; display: flex; }

.sidebar {
  display: none;
  width: var(--sidebar-w);
  flex-direction: column;
  background: var(--acrylic-nav);
  backdrop-filter: blur(40px) saturate(1.2);
  -webkit-backdrop-filter: blur(40px) saturate(1.2);
  border-right: 1px solid rgba(0,0,0,0.08);
  position: fixed;
  left: 0; top: 0; bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  padding: 20px 16px;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.sidebar-brand h1 { font-size: 1.15rem; font-weight: 300; color: var(--miet-blue); }
.sidebar-brand .sub { font-size: 0.7rem; color: var(--miet-gold); font-weight: 600; text-transform: uppercase; }

.nav-item {
  display: flex;
  align-items: center;
  min-height: var(--touch);
  padding: 0 16px;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-size: 0.95rem;
  color: var(--miet-text);
  cursor: pointer;
  border-left: 3px solid transparent;
}

.nav-item:hover { background: rgba(0, 120, 215, 0.08); }
.nav-item.active { background: rgba(0, 120, 215, 0.12); border-left-color: var(--accent); color: var(--accent); font-weight: 600; }

.main {
  flex: 1;
  margin-left: 0;
  padding: 16px;
  padding-bottom: 72px;
  width: 100%;
  max-width: 1100px;
}

@media (min-width: 900px) {
  .sidebar { display: flex; }
  .main { margin-left: var(--sidebar-w); padding-bottom: 24px; }
  .bottom-nav { display: none !important; }
}

.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: flex;
  background: var(--acrylic-nav);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border-top: 1px solid rgba(0,0,0,0.08);
  z-index: 100;
}

.bottom-nav button {
  flex: 1;
  border: none;
  background: transparent;
  min-height: 52px;
  font-size: 0.7rem;
  color: var(--miet-muted);
  cursor: pointer;
  border-top: 3px solid transparent;
}

.bottom-nav button.active { color: var(--accent); border-top-color: var(--accent); font-weight: 600; }

.panel {
  background: var(--acrylic);
  backdrop-filter: blur(24px) saturate(1.35);
  -webkit-backdrop-filter: blur(24px) saturate(1.35);
  border: 1px solid rgba(255,255,255,0.6);
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
  margin-bottom: 12px;
}

.panel-h {
  padding: 12px 16px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--miet-blue);
  background: rgba(255,255,255,0.5);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.panel-b { padding: 16px; }

.week-bar { display: flex; gap: 0; margin-bottom: 12px; }
.week-btn {
  flex: 1;
  min-height: var(--touch);
  border: 1px solid rgba(0,0,0,0.12);
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  font-weight: 600;
  color: var(--miet-blue);
}
.week-btn + .week-btn { border-left: none; }
.week-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.schedule-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.schedule-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.schedule-table th, .schedule-table td {
  border: 1px solid rgba(0,0,0,0.1);
  padding: 8px 6px;
  vertical-align: top;
}

.schedule-table th {
  background: rgba(11, 61, 145, 0.1);
  color: var(--miet-blue);
  font-weight: 600;
  text-align: center;
}

.schedule-table th.time-col { width: 88px; background: rgba(212, 160, 23, 0.15); font-size: 0.7rem; }

.schedule-table td.time-col {
  font-weight: 600;
  font-size: 0.68rem;
  color: var(--miet-blue-dark);
  background: rgba(255,255,255,0.4);
  text-align: center;
}

.cell-lesson {
  background: rgba(255,255,255,0.55);
  padding: 6px;
  margin: 2px 0;
  border-left: 3px solid var(--accent);
  font-size: 0.78rem;
}

.cell-lesson.cancelled {
  border-left-color: #c42b1c;
  background: rgba(196, 43, 28, 0.08);
  opacity: 0.85;
}

.cell-lesson .subj { font-weight: 600; color: var(--miet-blue); }
.cell-lesson .meta { color: var(--miet-muted); font-size: 0.72rem; }
.cell-lesson .wk { color: var(--miet-gold); font-size: 0.65rem; }
.cell-lesson .cancel { color: #c42b1c; font-size: 0.72rem; font-style: italic; }

input, select, textarea, button { font-size: 16px; font-family: inherit; }
input, select, textarea {
  width: 100%;
  border: none;
  border-bottom: 2px solid rgba(0,0,0,0.15);
  padding: 12px 4px;
  margin-bottom: 12px;
  min-height: 44px;
  background: transparent;
}

.btn {
  display: inline-block;
  border: none;
  padding: 12px 20px;
  min-height: var(--touch);
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 8px;
  margin-right: 8px;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: rgba(255,255,255,0.6); color: var(--miet-blue); border: 1px solid var(--miet-blue); }
.btn-danger { background: #c42b1c; color: #fff; }
.btn-gold { background: var(--miet-gold); color: var(--miet-blue-dark); }

.hint { font-size: 0.85rem; color: var(--miet-muted); margin-bottom: 10px; line-height: 1.45; }
.error { color: #c42b1c; margin-bottom: 8px; }
.ok { color: #107c10; margin-bottom: 8px; }
.hidden { display: none !important; }

.hw-item, .user-item, .news-admin-item {
  padding: 12px 0;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 600px) { .grid-2 { grid-template-columns: 1fr; } }

.login-wrap {
  max-width: 400px;
  margin: 40px auto;
}

.infoboard-body { padding: 0; }
.infoboard-splash {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
}
.infoboard-splash h1 { font-size: 2.5rem; font-weight: 200; text-shadow: 0 2px 20px rgba(0,0,0,0.5); }
.infoboard-splash p { font-size: 1.2rem; color: var(--miet-gold); margin-top: 8px; }

.news-card { display: flex; gap: 16px; flex-wrap: wrap; padding: 16px; }
.news-card img { max-width: 320px; max-height: 200px; object-fit: cover; }

.sidebar-logo { max-width: 120px; max-height: 48px; object-fit: contain; margin-bottom: 8px; display: block; }

.mobile-schedule-wrap { display: none; }
.mobile-day-card {
  background: rgba(255,255,255,0.55);
  border: 1px solid rgba(0,0,0,0.08);
  margin-bottom: 12px;
  padding: 12px;
}
.mobile-day-card h3 { font-size: 1rem; color: var(--miet-blue); margin-bottom: 10px; }
.mobile-pair { margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid rgba(0,0,0,0.06); }
.mobile-pair-time { font-size: 0.75rem; font-weight: 700; color: var(--miet-gold); margin-bottom: 4px; }

@media (max-width: 899px) {
  .schedule-table-wrap { display: none !important; }
  .mobile-schedule-wrap { display: block !important; }
}

.edit-cell {
  cursor: pointer;
  min-height: 44px;
  text-align: center;
  font-size: 0.78rem;
  background: rgba(255,255,255,0.4);
}
.edit-cell:hover { background: rgba(0, 120, 215, 0.15); }
.edit-grid-table { margin-top: 12px; }

.pwa-install {
  position: fixed;
  bottom: 60px;
  left: 12px;
  right: 12px;
  z-index: 200;
  background: var(--acrylic);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(0,0,0,0.1);
  padding: 12px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.pwa-install span { flex: 1; font-size: 0.9rem; }
@media (min-width: 900px) {
  .pwa-install { bottom: 16px; left: auto; right: 16px; max-width: 360px; }
}