:root {
    --color-primary: #2b6cb0;
    --color-secondary: #4c51bf;
    --color-success: #38a169;
    --color-warning: #dd6b20;
    --color-danger: #e53e3e;
    --color-info: #3182ce;
    --color-gray-100: #f7fafc;
    --color-gray-200: #edf2f7;
    --color-gray-300: #e2e8f0;
    --color-gray-400: #cbd5f5;
    --color-gray-500: #a0aec0;
    --color-gray-600: #718096;
    --color-gray-700: #4a5568;
    --color-gray-800: #2d3748;
    --color-gray-900: #1a202c;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --font-family-base: "Inter","DejaVu Sans",system-ui,-apple-system,Roboto,Arial,sans-serif;
    --font-size-base: 16px;
    --attendance-present-bg: #d1e7dd;
    --attendance-present-text: #0f5132;
    --attendance-absent-bg: #f8d7da;
    --attendance-absent-text: #842029;
    --attendance-late-bg: #fff3cd;
    --attendance-late-text: #664d03;
    --attendance-excused-bg: #cfe2ff;
    --attendance-excused-text: #084298;
    --attendance-holiday-bg: #e7e7ff;
    --attendance-border: rgba(15, 23, 42, 0.08);
    --task-todo-bg: #e0f2fe;
    --task-todo-text: #1d4ed8;
    --task-progress-bg: #fef3c7;
    --task-progress-text: #b45309;
    --task-done-bg: #dcfce7;
    --task-done-text: #15803d;
    --task-border: rgba(15, 23, 42, 0.08);
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    color: var(--color-gray-900);
}

.card-modern,
.card {
    border-radius: var(--radius-lg);
    border: 0;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
}

.card-modern .card-header,
.card .card-header {
    border-bottom: 0;
    background: transparent;
}

.section-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-gray-700);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.form-control,
.form-select,
.form-check-input {
    border-radius: var(--radius-md);
    border-color: rgba(15, 23, 42, 0.12);
    padding: 0.65rem 0.85rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(43, 108, 176, 0.12);
}

.btn {
    border-radius: var(--radius-md);
    font-weight: 600;
}

.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    box-shadow: 0 12px 24px rgba(43, 108, 176, 0.25);
}

.btn-outline-primary {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

.badge-soft {
    border-radius: 999px;
    padding: 0.35rem 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
}

.badge-holiday {
    background: var(--attendance-holiday-bg);
    color: var(--color-danger);
    border-radius: 999px;
    padding: 0.25rem 0.75rem;
    font-weight: 600;
}

.theme-preview {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2.5rem;
    background: linear-gradient(145deg, rgba(247, 250, 252, 0.9), #fff);
}

.theme-preview__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    background: var(--header-bg);
    color: var(--header-text);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
}

.theme-preview__brand {
    font-weight: 700;
    font-size: 1.25rem;
}

.theme-preview__nav {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: rgba(26, 32, 44, 0.72);
}

.theme-preview__nav span {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    transition: background-color 0.2s ease;
}

.theme-preview__nav span:hover {
    background-color: rgba(43, 108, 176, 0.12);
    color: var(--color-primary);
}

.theme-preview__content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.theme-preview__card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.12);
}

.theme-preview__card-head {
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.theme-preview__text {
    color: var(--color-gray-600);
    margin-bottom: 1.25rem;
}

.theme-preview__actions {
    display: flex;
    gap: 0.75rem;
}

.theme-preview__calendar {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.06);
}

.theme-preview__calendar-head {
    font-weight: 600;
    margin-bottom: 1rem;
}

.theme-preview__calendar-body {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.theme-preview__login {
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    background: var(--login-background);
    display: flex;
    justify-content: center;
}

.theme-preview__login-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--login-card-shadow);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: min(320px, 100%);
}

.task-manager .card,
.report-dashboard .card {
    border-color: var(--task-border);
}

.task-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    border-radius: 999px;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.task-status-todo,
.status-todo {
    background-color: var(--task-todo-bg);
    color: var(--task-todo-text);
}

.task-status-progress,
.status-progress {
    background-color: var(--task-progress-bg);
    color: var(--task-progress-text);
}

.task-status-done,
.status-done {
    background-color: var(--task-done-bg);
    color: var(--task-done-text);
}

.task-manager table td,
.report-dashboard table td {
    vertical-align: top;
}

.attendance-calendar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.attendance-week-header {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 0.75rem;
}

.attendance-calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 0.75rem;
}

.attendance-week {
    display: contents;
}

.attendance-weekday {
    text-align: center;
    letter-spacing: 0.08em;
}

.attendance-day {
    position: relative;
    border: 1px solid var(--attendance-border);
    border-radius: 0.75rem;
    min-height: 110px;
    background-color: #fff;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.attendance-day.is-today {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.15);
}

.attendance-day.is-holiday {
    background-color: var(--attendance-holiday-bg);
}

.attendance-day.is-disabled .attendance-day-button {
    cursor: not-allowed;
    opacity: 0.75;
}

.attendance-day.is-outside {
    background-color: transparent;
    border-style: dashed;
    border-color: rgba(15, 23, 42, 0.05);
}

.attendance-day-button {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 0.75rem;
    background: transparent;
    border: 0;
    width: 100%;
    height: 100%;
    text-align: left;
    border-radius: inherit;
    color: inherit;
}

.attendance-day-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.25);
}

.attendance-day-button:not(:disabled):hover {
    box-shadow: inset 0 0 0 1px rgba(13, 110, 253, 0.2);
}

.attendance-day-number {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.35rem;
}

.badge-task {
    display: inline-block;
    padding: 0.35rem 0.6rem;
    font-weight: 600;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    line-height: 1;
}

.badge-todo {
    background: #FFE08A;
    color: #3B3B3B;
}

.badge-in-progress {
    background: #CDE5FF;
    color: #0B3B75;
}

.badge-done {
    background: #C6F6D5;
    color: #1C4532;
}

.badge-overdue {
    background: #FECACA;
    color: #7F1D1D;
}

.table .badge-task {
    vertical-align: middle;
}

.attendance-day-status {
    display: block;
    margin-bottom: 0.5rem;
}

.attendance-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    border-radius: 999px;
    padding: 0.15rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.status-present {
    background-color: var(--attendance-present-bg);
    color: var(--attendance-present-text);
}

.status-absent {
    background-color: var(--attendance-absent-bg);
    color: var(--attendance-absent-text);
}

.status-late {
    background-color: var(--attendance-late-bg);
    color: var(--attendance-late-text);
}

.status-excused {
    background-color: var(--attendance-excused-bg);
    color: var(--attendance-excused-text);
}

.status-holiday {
    background-color: var(--attendance-holiday-bg);
    color: var(--color-danger);
}

.attendance-note {
    display: block;
    font-size: 0.8rem;
    line-height: 1.3;
    max-height: 3.2rem;
    overflow: hidden;
    text-overflow: ellipsis;
}

@media (max-width: 768px) {
    .attendance-week-header {
        display: none;
    }

    .attendance-calendar-grid {
        display: flex;
        gap: 1rem;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        scroll-snap-type: x mandatory;
    }

    .attendance-week {
        display: grid;
        grid-template-columns: repeat(7, minmax(90px, 1fr));
        gap: 0.75rem;
        flex: 0 0 100%;
        scroll-snap-align: start;
    }

    .attendance-day {
        min-height: 120px;
    }
}