:root {
    --bg: #f4f6f8;
    --surface: #fff;
    --border: #ddd;
    --text: #222;
    --nav-bg: #1e3a5f;
    --period-bg: #34495e;
    --emp-cell-bg: #f8f9fa;
    --slot-empty-bg: #fafafa;
    --slot-empty-border: #e8e8e8;
    --simple-th-bg: #f5f5f5;
    --thead-bg: #1e3a5f;
    --period-morning-accent: #4a90d9;
    --period-afternoon-accent: #9b59b6;
    --slot-absent-bg: #e8e8e8;
    --slot-absent-text: #999;
}

[x-cloak] { display: none !important; }

[data-theme="dark"] {
    --bg: #0f1117;
    --surface: #1a1d27;
    --border: #2e3244;
    --text: #e2e8f0;
    --nav-bg: #0d1b2e;
    --period-bg: #1e2433;
    --emp-cell-bg: #1e2433;
    --slot-empty-bg: #13161f;
    --slot-empty-border: #252a3a;
    --simple-th-bg: #1e2433;
    --thead-bg: #0d1b2e;
    --slot-absent-bg: #252535;
    --slot-absent-text: #555;
}

*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: 'Segoe UI', sans-serif;
    background: var(--bg);
    margin: 0;
    color: var(--text);
}

nav {
    background: var(--nav-bg);
    color: #fff;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
nav a { color: #adc8ff; text-decoration: none; font-size: 0.9rem; }
nav a:hover { color: #fff; }
nav .brand { font-weight: 700; font-size: 1.1rem; color: #fff; }

.container { max-width: 100%; padding: 1rem 1.5rem; }

/* Week navigation */
.week-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}
.week-nav h2 { margin: 0; font-size: 1.1rem; }
.btn { padding: 0.4rem 0.9rem; border: none; border-radius: 4px; cursor: pointer; font-size: 0.85rem; }
.btn-primary   { background: #1e3a5f; color: #fff; }
.btn-secondary { background: #e0e0e0; color: #333; }
.btn-danger    { background: #c0392b; color: #fff; }
.btn-sm        { padding: 0.25rem 0.6rem; font-size: 0.78rem; }

/* Grid */
.schedule-grid {
    overflow-x: auto;
}

table.grid {
    border-collapse: collapse;
    width: 100%;
    min-width: 900px;
    background: var(--surface);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,.1);
}

table.grid th, table.grid td {
    border: 1px solid var(--border);
    padding: 0;
    vertical-align: top;
}

table.grid thead th {
    background: var(--thead-bg);
    color: #fff;
    text-align: center;
    font-size: 0.85rem;
    padding: 0.5rem;
    font-weight: 600;
}

/* Period header rows */
.period-header td {
    background: var(--period-bg);
    color: #fff;
    font-size: 0.82rem;
    font-weight: 700;
    padding: 0.5rem 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-top: 3px solid var(--period-morning-accent);
}

.period-header.afternoon td {
    border-top-color: var(--period-afternoon-accent);
}

/* Employee name cell */
td.employee-cell {
    width: 115px;
    min-width: 115px;
    background: var(--emp-cell-bg);
    font-weight: 700;
    font-size: 0.88rem;
    padding: 0.4rem 0.6rem;
    border-right: 2px solid var(--border);
    vertical-align: middle;
}

.emp-cell-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
}

.emp-cell-actions {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex-shrink: 0;
}

.emp-cell-actions .btn {
    font-size: 0.65rem;
    padding: 1px 5px;
}

/* Schedule cells */
td.slot {
    width: calc((100% - 115px) / 5);
    min-height: 42px;
    cursor: pointer;
    transition: filter 0.15s;
    position: relative;
}
td.slot:hover { filter: brightness(0.92); }

.slot-inner {
    padding: 0.35rem 0.5rem;
    min-height: 42px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-size: 0.78rem;
    line-height: 1.3;
}

.slot-inner .task-name { font-weight: 600; }
.slot-inner .note      { color: #555; font-size: 0.72rem; margin-top: 2px; }

/* Empty slot */
td.slot.empty .slot-inner {
    background: var(--slot-empty-bg);
    border: 1px dashed var(--slot-empty-border);
    border-radius: 3px;
    margin: 3px;
}

/* Absent slot */
td.slot.absent .slot-inner {
    background: var(--slot-absent-bg);
    color: var(--slot-absent-text);
    font-style: italic;
    font-size: 0.75rem;
    text-align: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 0;
    margin: 0;
    border: none;
}

/* Colour categories */
.cat-green  { background-color: #81c784 !important; color: #1b5e20; }
.cat-blue   { background-color: #64b5f6 !important; color: #0d47a1; }
.cat-purple { background-color: #ce93d8 !important; color: #4a148c; }
.cat-yellow { background-color: #fff176 !important; color: #f57f17; }

/* Legend */
.legend {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}
.legend-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
}
.legend-box {
    width: 18px;
    height: 18px;
    border-radius: 3px;
    border: 1px solid rgba(0,0,0,.2);
}

/* Modal */
.modal-backdrop {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.45);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000;
}
.modal {
    background: var(--surface);
    border-radius: 8px;
    padding: 1.5rem;
    width: 380px;
    max-width: 95vw;
    box-shadow: 0 8px 24px rgba(0,0,0,.2);
}
.modal h3 { margin: 0 0 1rem; font-size: 1rem; }
.form-group { margin-bottom: 0.85rem; }
.form-group label { display: block; font-size: 0.82rem; margin-bottom: 0.25rem; font-weight: 600; }
.form-group select,
.form-group input[type=text],
.form-group input[type=email],
.form-group input[type=password],
.form-group input[type=number],
input[type=email], input[type=password] {
    width: 100%; padding: 0.4rem 0.5rem;
    border: 1px solid var(--border); border-radius: 4px; font-size: 0.85rem;
    background: var(--surface); color: var(--text);
    box-sizing: border-box;
}
.modal-actions { display: flex; gap: 0.5rem; justify-content: flex-end; margin-top: 1rem; }

/* Employee CRUD */
.card {
    background: var(--surface); border-radius: 6px;
    padding: 1.25rem; box-shadow: 0 1px 4px rgba(0,0,0,.1);
    margin-bottom: 1rem;
}
table.simple { width: 100%; border-collapse: collapse; font-size: 0.87rem; }
table.simple th, table.simple td {
    border-bottom: 1px solid #eee; padding: 0.5rem 0.75rem; text-align: left; color: var(--text);
}
table.simple th { background: var(--simple-th-bg); font-weight: 700; color: var(--text); }
.alert-success {
    background: #e8f5e9; border: 1px solid #a5d6a7;
    color: #2e7d32; padding: 0.6rem 1rem; border-radius: 4px; margin-bottom: 1rem;
    font-size: 0.87rem;
}

.slot[draggable="true"] { cursor: grab; }
.slot[draggable="true"]:active { cursor: grabbing; }
.slot.drag-over { outline: 2px dashed #3498db; }

.slot.prio-warn-cell {
    outline: 2px solid #e67e22 !important;
    outline-offset: -2px;
}

.prio-warn {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    margin-top: 3px;
    font-size: 0.72rem;
    font-weight: 700;
    color: #fff;
    background: #e67e22;
    border-radius: 3px;
    padding: 1px 5px;
    pointer-events: none;
}

/* Dropdowns */
.dropdown { position: relative; }
.dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,.18);
    z-index: 200;
    min-width: 200px;
    padding: 4px 0;
}
.dropdown-item {
    display: block;
    width: 100%;
    padding: 0.45rem 1rem;
    background: none;
    border: none;
    text-align: left;
    font-size: 0.85rem;
    color: var(--text);
    cursor: pointer;
    white-space: nowrap;
}
.dropdown-item:hover { background: var(--emp-cell-bg); }

/* Stats summary table */
.table-stats {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.83rem;
    margin-top: 1rem;
    background: var(--surface);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,.08);
}
.table-stats th {
    background: var(--simple-th-bg);
    color: var(--text);
    font-weight: 600;
    font-size: 0.8rem;
    padding: 0.4rem 0.6rem;
    text-align: center;
    border-bottom: 2px solid var(--border);
}
.table-stats th:first-child { text-align: left; }
.table-stats td {
    padding: 0.3rem 0.6rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}
.table-stats td:first-child {
    text-align: left;
    font-weight: 700;
    background: var(--emp-cell-bg);
    width: 115px;
}
.table-stats tr:last-child td { border-bottom: none; }

/* Copy slot */
.slot-copy-icon {
    position: absolute;
    top: 3px;
    right: 3px;
    font-size: 0.7rem;
    opacity: 0;
    transition: opacity 0.15s;
    background: rgba(255,255,255,0.85);
    border: none;
    border-radius: 3px;
    padding: 1px 4px;
    cursor: pointer;
    line-height: 1;
    z-index: 1;
}
[data-theme="dark"] .slot-copy-icon {
    background: rgba(30,36,51,0.9);
}
td.slot:hover .slot-copy-icon { opacity: 1; }
td.slot.slot-copy-source { outline: 2px solid #3498db; outline-offset: -2px; }
td.slot.slot-copy-target:hover .slot-inner { background: rgba(52,152,219,0.12) !important; }

.copy-banner {
    background: #3498db;
    color: #fff;
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 4px;
}
.copy-banner button {
    background: rgba(255,255,255,0.2);
    border: none;
    color: #fff;
    padding: 0.2rem 0.6rem;
    border-radius: 3px;
    cursor: pointer;
    font-size: 0.82rem;
}
.copy-banner button:hover { background: rgba(255,255,255,0.35); }