:root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #22c55e;
    --accent-red: #ef4444;
    --accent-blue: #3b82f6;
    --accent-yellow: #fbbf24;
    --accent-orange: #f97316;
    --border: #334155;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.3);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

a { color: var(--accent-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Login ── */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg) 0%, #1e3a5f 100%);
}

.login-box {
    background: var(--surface);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
}

.login-box h1 { font-size: 1.5rem; margin-bottom: 0.25rem; text-align: center; }
.login-box .subtitle { color: var(--text-muted); text-align: center; margin-bottom: 1.5rem; font-size: 0.9rem; }

/* ── Forms ── */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.35rem; font-size: 0.85rem; color: var(--text-muted); }
.form-group input {
    width: 100%;
    padding: 0.6rem 0.8rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 1rem;
}
.form-group input:focus { outline: none; border-color: var(--accent-blue); }

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    background: var(--surface-light);
    color: var(--text);
}
.btn:hover { opacity: 0.9; }
.btn-primary { background: var(--accent-blue); color: white; width: 100%; justify-content: center; }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.8rem; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Alert ── */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}
.alert-error { background: rgba(239,68,68,0.15); border: 1px solid var(--accent-red); color: var(--accent-red); }

/* ── Topbar ── */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand { display: flex; align-items: center; gap: 0.6rem; }
.logo { font-size: 1.4rem; }
.brand .title { font-weight: 600; font-size: 1.1rem; }
.brand .sub { color: var(--text-muted); font-size: 0.8rem; margin-left: 0.5rem; }

/* ── Clock ── */
.clock {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent);
    background: rgba(34, 197, 94, 0.1);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius);
    border: 1px solid rgba(34, 197, 94, 0.2);
    letter-spacing: 0.05em;
}

/* ── Container ── */
.container { max-width: 1200px; margin: 0 auto; padding: 1.5rem; }

/* ── Day Picker ── */
.day-picker {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding: 0.75rem 1rem;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.day-picker select {
    padding: 0.4rem 0.7rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.9rem;
}

/* ── KPI Grid ── */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.kpi-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
    transition: transform 0.15s;
}
.kpi-card:hover { transform: translateY(-2px); }

.kpi-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-blue);
    margin-bottom: 0.25rem;
}
.kpi-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Charts Row ── */
.charts-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.chart-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
}
.chart-card h3 {
    font-size: 0.95rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* ── Bar Chart ── */
.bar-chart { display: flex; flex-direction: column; gap: 0.6rem; }
.bar-row {
    display: grid;
    grid-template-columns: 110px 1fr 40px;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
}
.bar-label { color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { background: var(--bg); height: 18px; border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 4px; transition: width 0.4s ease; }
.bar-value { text-align: right; color: var(--text-muted); }

/* ── Donut Chart ── */
.donut-chart {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.donut-inner {
    text-align: center;
    z-index: 1;
}
.donut-inner span {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
}
.donut-inner small { color: var(--text-muted); font-size: 0.75rem; }

/* ── Table Card ── */
.table-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    overflow: hidden;
}
.table-card h3 {
    font-size: 0.95rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* ── Filters ── */
.filters { display: flex; gap: 0.75rem; margin-bottom: 1rem; flex-wrap: wrap; }
.filters select {
    padding: 0.35rem 0.6rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.85rem;
}

/* ── Table ── */
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }

thead th {
    text-align: left;
    padding: 0.6rem 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody td {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    vertical-align: top;
}
tbody tr:hover { background: rgba(255,255,255,0.03); }

.cell-green { color: var(--accent); font-weight: 600; }
.cell-red { color: var(--accent-red); font-weight: 600; }

/* ── Badges ── */
.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.badge-green { background: rgba(34,197,94,0.15); color: #4ade80; }
.badge-red { background: rgba(239,68,68,0.15); color: #f87171; }
.badge-blue { background: rgba(59,130,246,0.15); color: #60a5fa; }
.badge-yellow { background: rgba(251,191,36,0.15); color: #facc15; }
.badge-gray { background: rgba(148,163,184,0.15); color: #94a3b8; }
.badge-orange { background: rgba(249,115,22,0.15); color: #fb923c; }
.badge-dark { background: rgba(107,114,128,0.15); color: #9ca3af; }

/* ── Pagination ── */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* ── Empty ── */
.empty {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ── Responsive ── */
@media (max-width: 640px) {
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
    .charts-row { grid-template-columns: 1fr; }
    .bar-row { grid-template-columns: 80px 1fr 35px; }
    .container { padding: 1rem; }
}