:root {
  --blue: #124a89; --blue-dark: #093464; --blue-light: #e9f2fd;
  --green: #067647; --orange: #b54708; --red: #b42318;
  --ink: #101828; --muted: #667085; --line: #e4e7ec;
  --surface: #fff; --bg: #f6f8fc; --radius: 18px;
  --shadow: 0 12px 32px rgba(16, 24, 40, .07);
  font-family: Arial, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--bg); }
a { color: var(--blue); text-decoration: none; }
.appbar { height: 68px; padding: 10px max(16px, calc((100% - 1100px) / 2)); display: flex; align-items: center; justify-content: space-between; background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.brand { display: flex; gap: 11px; align-items: center; color: var(--ink); }
.brand-mark { display: grid; place-items: center; width: 45px; height: 45px; border-radius: 14px; background: linear-gradient(145deg, var(--blue), var(--blue-dark)); color: #fff; font-weight: 800; }
.brand strong { display: block; font-size: 21px; color: var(--blue); }
.brand small { display: block; color: var(--muted); font-size: 11px; }
.plain-link { font-weight: 700; font-size: 14px; }
.container { max-width: 1100px; padding: 22px 16px 92px; margin: 0 auto; }
.auth-shell { min-height: calc(100vh - 68px); display: grid; place-items: center; padding: 24px 16px; }
.auth-card, .card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(18px, 3vw, 28px); box-shadow: var(--shadow); }
.auth-card { width: min(460px, 100%); }
h1, h2, h3 { margin: 0 0 8px; line-height: 1.2; }
h1 { color: var(--blue); font-size: clamp(25px, 5vw, 32px); }
.muted { color: var(--muted); line-height: 1.55; }
.stack { display: grid; gap: 15px; margin-top: 22px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
label { font-weight: 700; font-size: 13px; }
input, select, textarea { width: 100%; min-height: 46px; padding: 11px 12px; border: 1px solid #d0d5dd; border-radius: 11px; background: #fff; color: var(--ink); font: inherit; }
textarea { min-height: 94px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid #b2d3fb; border-color: var(--blue); }
.btn { border: 0; min-height: 47px; padding: 12px 17px; border-radius: 12px; color: #fff; background: linear-gradient(145deg, var(--blue), var(--blue-dark)); font-weight: 700; font-size: 15px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 7px; }
.btn.secondary { color: var(--blue); background: var(--blue-light); }
.btn.danger { background: #fef3f2; color: var(--red); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.alert { border-radius: 12px; padding: 12px 14px; margin: 15px 0; font-size: 14px; }
.alert.error { color: var(--red); background: #fef3f2; }
.alert.success { color: var(--green); background: #ecfdf3; }
.hero { border-radius: 22px; padding: 22px; margin-bottom: 20px; color: #fff; background: linear-gradient(125deg, var(--blue-dark), var(--blue)); }
.hero h1 { color: #fff; }
.hero .muted { color: rgba(255,255,255,.77); }
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 18px 0; }
.tile { min-height: 120px; display: grid; align-content: center; gap: 8px; }
.tile strong { color: var(--ink); }
.tile span { color: var(--muted); font-size: 13px; }
.two-column { display: grid; grid-template-columns: 1.5fr 1fr; gap: 18px; }
.status { display: inline-flex; border-radius: 30px; padding: 5px 10px; font-size: 12px; font-weight: 700; color: var(--green); background: #ecfdf3; }
.status.pending { color: var(--orange); background: #fffaeb; }
.status.rejected { color: var(--red); background: #fef3f2; }
.table-wrap { overflow-x: auto; border-radius: 14px; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 11px; text-align: left; border-bottom: 1px solid var(--line); font-size: 14px; }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; }
.timetable { display: grid; gap: 12px; }
.day-card { display: grid; gap: 9px; }
.period { display: grid; grid-template-columns: 110px 1fr; gap: 12px; align-items: center; padding: 11px; border-radius: 12px; background: var(--blue-light); }
.bottom-nav { display: none; position: fixed; bottom: 0; left: 0; right: 0; height: 66px; border-top: 1px solid var(--line); background: #fff; z-index: 30; grid-template-columns: repeat(4, 1fr); }
.bottom-nav a { display: grid; place-items: center; font-size: 12px; font-weight: 700; }
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 28px 10px 80px; }
@media (max-width: 760px) { .tiles, .grid, .two-column { grid-template-columns: 1fr; } .bottom-nav { display: grid; } .period { grid-template-columns: 88px 1fr; } }