:root {
    --brand: #0b5b76;
    --brand-dark: #073e50;
    --bg: #f4f6f8;
    --border: #d9e0e5;
    --text: #1c2b33;
    --muted: #64778a;
    --danger: #b3261e;
    --ok: #1c7c3f;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { color: var(--brand); }
header.topbar {
    background: var(--brand-dark);
    color: #fff;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
header.topbar a { color: #fff; text-decoration: none; }
header.topbar nav a { margin-right: 1rem; opacity: 0.9; }
header.topbar nav a:hover { opacity: 1; text-decoration: underline; }
main.container { max-width: 1100px; margin: 0 auto; padding: 1.5rem; }
.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}
h1 { font-size: 1.5rem; margin-top: 0; }
h2 { font-size: 1.15rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { padding: 0.4rem 0.55rem; border-bottom: 1px solid var(--border); text-align: left; }
th { background: #eef2f5; font-weight: 600; }
tr.dept-row td { font-weight: 700; background: #f8fafb; }
input[type=text], input[type=number], input[type=email], input[type=password], input[type=date], select {
    padding: 0.35rem 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    width: 100%;
    font-size: 0.92rem;
}
input[type=number] { width: 6.5rem; }
label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 0.2rem; }
.field { margin-bottom: 0.85rem; }
.btn {
    display: inline-block;
    background: var(--brand);
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.92rem;
    text-decoration: none;
}
.btn:hover { background: var(--brand-dark); }
.btn.secondary { background: #fff; color: var(--brand); border: 1px solid var(--brand); }
.error { color: var(--danger); margin-bottom: 1rem; }
.pill {
    display: inline-block;
    padding: 0.1rem 0.6rem;
    border-radius: 999px;
    font-size: 0.78rem;
    background: #e4ecef;
}
.pill.draft { background: #f0e6c8; }
.pill.submitted { background: #dbe8f6; }
.pill.approved { background: #dcefe0; color: var(--ok); }
.diff-pos { color: var(--ok); }
.diff-neg { color: var(--danger); }
.tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.tabs a {
    padding: 0.4rem 0.9rem;
    border-radius: 6px 6px 0 0;
    border: 1px solid var(--border);
    border-bottom: none;
    background: #eef2f5;
    text-decoration: none;
    color: var(--text);
}
.tabs a.active { background: #fff; font-weight: 600; }
.day-grid { overflow-x: auto; }