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

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --late-color: #ef4444;
    --early-color: #f59e0b;
    --ot-color: #10b981;
    --duration-color: #3b82f6;
    --present-color: #10b981;
    --absent-color: #ef4444;
    --leave-color: #8b5cf6;
    --weekoff-color: #64748b;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body {
    font-family: Arial, sans-serif;
    font-size: 7pt;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px 16px;
}

header {
    text-align: center;
    margin-bottom: 24px;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 4px;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}

.card h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.field label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.field input[type="time"] {
    padding: 10px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text);
    background: #f8fafc;
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
}

.field input[type="time"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.btn-primary,
.btn-secondary,
.btn-danger {
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    margin-top: 16px;
    width: 100%;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    background: var(--border);
    color: var(--text-muted);
    margin-top: 8px;
    width: 100%;
}

.btn-secondary:hover {
    background: #d1d5db;
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1.5px solid var(--danger);
    padding: 6px 14px;
    font-size: 0.8rem;
}

.btn-danger:hover {
    background: var(--danger);
    color: #fff;
}

/* Results */
.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.result-item {
    display: flex;
    flex-direction: column;
    padding: 12px;
    border-radius: 8px;
    background: #f8fafc;
    border-left: 3px solid var(--border);
}

.result-item.late {
    border-left-color: var(--late-color);
}

.result-item.early {
    border-left-color: var(--early-color);
}

.result-item.overtime {
    border-left-color: var(--ot-color);
}

.result-item.duration {
    border-left-color: var(--duration-color);
}

.result-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.result-value {
    font-size: 1.2rem;
    font-weight: 700;
    margin-top: 4px;
    color: var(--text);
}

.result-item.late .result-value {
    color: var(--late-color);
}

.result-item.early .result-value {
    color: var(--early-color);
}

.result-item.overtime .result-value {
    color: var(--ot-color);
}

.result-item.duration .result-value {
    color: var(--duration-color);
}

/* History */
.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.history-header h2 {
    margin-bottom: 0;
}

.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

thead th {
    text-align: left;
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    padding: 8px 10px;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

tbody td {
    padding: 10px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody tr:last-child td {
    border-bottom: none;
}

tbody tr:hover {
    background: #f8fafc;
}

/* ---- Monthly Tracker ---- */
.monthly-tracker {
    max-width: 100%;
}

.monthly-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.monthly-header h2 {
    margin-bottom: 0;
}

.month-selector select {
    padding: 6px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--text);
    background: #f8fafc;
    cursor: pointer;
}

.month-selector select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Monthly Summary */
.monthly-summary {
    margin-bottom: 16px;
}

.summary-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 10px;
}

.summary-item {
    padding: 10px 12px;
    border-radius: 8px;
    background: #f8fafc;
    border-left: 3px solid var(--border);
    display: flex;
    flex-direction: column;
}

.summary-item.present { border-left-color: var(--present-color); }
.summary-item.absent { border-left-color: var(--absent-color); }
.summary-item.leave { border-left-color: var(--leave-color); }
.summary-item.weekoff { border-left-color: var(--weekoff-color); }
.summary-item.dur { border-left-color: var(--duration-color); }
.summary-item.ot { border-left-color: var(--ot-color); }
.summary-item.lat { border-left-color: var(--late-color); }
.summary-item.ear { border-left-color: var(--early-color); }

.sum-label {
    font-size: 0.65rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-muted);
}

.sum-value {
    font-size: 1.05rem;
    font-weight: 700;
    margin-top: 2px;
    color: var(--text);
}

.summary-item.present .sum-value { color: var(--present-color); }
.summary-item.absent .sum-value { color: var(--absent-color); }
.summary-item.leave .sum-value { color: var(--leave-color); }
.summary-item.dur .sum-value { color: var(--duration-color); }
.summary-item.ot .sum-value { color: var(--ot-color); }
.summary-item.lat .sum-value { color: var(--late-color); }
.summary-item.ear .sum-value { color: var(--early-color); }

/* Monthly table */
.monthly-table input[type="time"] {
    padding: 4px 6px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.8rem;
    color: var(--text);
    background: #f8fafc;
    width: 110px;
}

.monthly-table input[type="time"]:focus {
    outline: none;
    border-color: var(--primary);
}

.monthly-table select {
    padding: 4px 6px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.75rem;
    color: var(--text);
    background: #f8fafc;
    width: 90px;
}

.monthly-table select:focus {
    outline: none;
    border-color: var(--primary);
}

.monthly-table .btn-calc-day {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}

.monthly-table .btn-calc-day:hover {
    background: var(--primary-hover);
}

.monthly-table tbody td {
    padding: 6px 6px;
    vertical-align: middle;
}

.monthly-table thead th {
    padding: 8px 6px;
}

.day-label {
    font-weight: 600;
    font-size: 0.8rem;
}

.day-result {
    font-size: 0.78rem;
    font-weight: 500;
}

.status-present { color: var(--present-color); }
.status-absent { color: var(--absent-color); }
.status-leave { color: var(--leave-color); }
.status-weekoff { color: var(--weekoff-color); }

footer {
    text-align: center;
    padding: 20px 0 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Mobile tweaks */
@media (max-width: 640px) {
    .container {
        padding: 16px 10px;
    }

    header h1 {
        font-size: 1.4rem;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .summary-row {
        grid-template-columns: 1fr 1fr;
    }

    .card {
        padding: 16px;
    }

    table {
        font-size: 0.75rem;
    }

    thead th,
    tbody td {
        padding: 6px 4px;
    }

    .monthly-table input[type="time"] {
        width: 90px;
        font-size: 0.7rem;
    }

    .monthly-table select {
        width: 72px;
        font-size: 0.68rem;
    }
}