:root {
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --danger: #dc2626;
  --border: #e2e8f0;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg); color: var(--text); font-size: 15px;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--danger); font-size: 14px; margin-top: 8px; }

.lang-row { display: flex; justify-content: flex-end; margin-bottom: 10px; }
.lang-select { width: auto; padding: 6px 10px; font-size: 13px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text); cursor: pointer; }

.center-screen { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.login-card { width: 100%; max-width: 380px; }
.login-card h1 { font-size: 22px; margin-bottom: 4px; }
.login-card .muted { margin-bottom: 16px; }

input, select {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; background: #fff; color: var(--text);
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
label { display: block; font-size: 13px; color: var(--muted); font-weight: 600; }
label input, label select { margin-top: 4px; font-weight: 400; }

form > * + * { margin-top: 10px; }

.btn {
  border: none; border-radius: 8px; padding: 9px 16px; font-size: 14px; font-weight: 600;
  cursor: pointer; background: var(--border); color: var(--text);
}
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { background: transparent; border: 1px solid var(--border); }
.btn.danger { background: transparent; border: 1px solid var(--danger); color: var(--danger); }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn.wide { width: 100%; }

.topbar {
  background: var(--card); border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center; padding: 12px 24px;
}
.brand { font-weight: 700; font-size: 17px; }
.topbar-right { display: flex; align-items: center; gap: 12px; }

.tabs { display: flex; gap: 4px; background: var(--card); padding: 8px 24px 0; border-bottom: 1px solid var(--border); }
.tab {
  border: none; background: transparent; padding: 10px 16px; font-size: 14px; font-weight: 600;
  color: var(--muted); cursor: pointer; border-radius: 8px 8px 0 0;
}
.tab.active { color: var(--primary); background: var(--bg); }

.container { max-width: 1100px; margin: 0 auto; padding: 24px 16px; }
.section-head { display: flex; justify-content: space-between; align-items: center; margin: 18px 0 12px; flex-wrap: wrap; gap: 10px; }
.section-head h2 { font-size: 18px; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filters input, .filters select { width: auto; }

.week { margin-bottom: 20px; }
.week h3 { font-size: 15px; margin-bottom: 8px; color: var(--primary-dark); }
.day-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; }
.day { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 10px; min-height: 86px; }
.day .dname { font-size: 12px; font-weight: 700; color: var(--muted); }
.day .dnum { font-size: 17px; font-weight: 700; margin: 2px 0 6px; }
.shift-chip {
  background: #eff6ff; border: 1px solid #bfdbfe; color: var(--primary-dark);
  font-size: 12px; font-weight: 600; border-radius: 6px; padding: 3px 6px; margin-top: 4px;
}
.day.off .dnum { color: #cbd5e1; }
.day.today { border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary); }

.grid-form { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.grid-form .full { grid-column: 1 / -1; }
.row-gap { display: flex; gap: 8px; }
.form-card h3 { margin-bottom: 12px; font-size: 16px; }

.table-wrap { overflow-x: auto; padding: 0; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); }
th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
tr:last-child td { border-bottom: none; }
td .btn + .btn { margin-left: 6px; }

@media (max-width: 800px) {
  .day-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-form { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .day-grid { grid-template-columns: 1fr; }
  .grid-form { grid-template-columns: 1fr; }
}