/* =====================================================
   Dashboard Docentes - Estilos
   Diseño minimalista monocromático
   Inspirado en Dashboard Académico
   ===================================================== */

/* ----- Variables CSS ----- */
:root {
    /* Fondos */
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F8F9FA;
    --color-bg-tertiary: #F1F3F5;

    /* Bordes */
    --color-border-light: #E9ECEF;
    --color-border-medium: #DEE2E6;
    --color-border-dark: #ADB5BD;

    /* Texto */
    --color-text-primary: #212529;
    --color-text-secondary: #495057;
    --color-text-tertiary: #6C757D;
    --color-text-quaternary: #ADB5BD;

    /* Interactivos */
    --color-interactive-primary: #212529;
    --color-interactive-hover: #000000;
    --color-interactive-focus: #495057;

    /* Estados (solo para datos y alertas) */
    --color-success: #10B981;
    --color-success-bg: #D1FAE5;
    --color-warning: #F59E0B;
    --color-warning-bg: #FEF3C7;
    --color-danger: #EF4444;
    --color-danger-bg: #FEE2E2;

    /* Tipografía */
    --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.25rem;
    --text-xl: 1.5rem;
    --text-2xl: 2rem;
    --text-3xl: 3rem;

    /* Pesos tipográficos */
    --font-normal: 400;
    --font-medium: 500;
    --font-bold: 700;

    /* Espaciado (múltiplos de 4px) */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Bordes redondeados */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-full: 9999px;

    /* Layout */
    --header-height: 80px;
    --sidebar-width: 240px;
    --sidebar-width-collapsed: 64px;

    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease-in-out;

    /* Aliases para compatibilidad */
    --color-bg: var(--color-bg-primary);
    --color-text: var(--color-text-primary);
    --color-text-muted: var(--color-text-quaternary);
    --color-border: var(--color-border-medium);
    --color-primary: var(--color-interactive-primary);
    --color-primary-hover: var(--color-interactive-hover);
    --spacing-xs: var(--space-xs);
    --spacing-sm: var(--space-sm);
    --spacing-md: var(--space-md);
    --spacing-lg: var(--space-lg);
    --spacing-xl: var(--space-xl);
    --spacing-2xl: var(--space-2xl);
    --font-size-xs: var(--text-xs);
    --font-size-sm: var(--text-sm);
    --font-size-base: var(--text-base);
    --font-size-lg: var(--text-lg);
    --font-size-xl: var(--text-xl);
    --font-size-2xl: var(--text-2xl);
    --font-size-3xl: var(--text-3xl);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
}

/* ----- Header ----- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border-medium);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    z-index: 100;
}

.header__left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header__menu-btn {
    display: none;
}

.header__titles {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.header__title {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
}

.header__subtitle {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* ----- App Container ----- */
.app-container {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
}

/* ----- Sidebar ----- */
.sidebar {
    position: fixed;
    left: 0;
    top: var(--header-height);
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border-medium);
    padding: var(--space-md) 0;
    overflow-y: auto;
    z-index: 50;
    transition: width var(--transition-normal);
}

.sidebar--collapsed {
    width: var(--sidebar-width-collapsed);
}

.sidebar__collapse {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-sm);
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
}

.sidebar__collapse:hover {
    color: var(--color-text-primary);
}

.sidebar--collapsed .sidebar__collapse {
    justify-content: center;
}

.sidebar--collapsed .icon-collapse {
    display: none;
}

.sidebar--collapsed .icon-expand {
    display: block !important;
}

.sidebar__nav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.sidebar__link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-medium);
    border-left: 4px solid transparent;
    transition: all var(--transition-normal);
}

.sidebar__link:hover {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.sidebar__link--active {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    border-left-color: var(--color-interactive-primary);
}

.sidebar__link svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.sidebar__link span {
    white-space: nowrap;
    overflow: hidden;
    transition: opacity var(--transition-fast);
}

.sidebar--collapsed .sidebar__link {
    justify-content: center;
    padding: var(--space-md);
    border-left-width: 0;
}

.sidebar--collapsed .sidebar__link span {
    display: none;
}

.sidebar--collapsed .sidebar__link--active {
    background-color: var(--color-bg-primary);
    border-radius: 0;
}

.sidebar__support {
    margin-top: var(--space-lg);
    padding: 0 var(--space-lg);
    border-top: 1px solid var(--color-border-medium);
    padding-top: var(--space-md);
}

.sidebar__support-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-medium);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.sidebar__support-link:hover {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.sidebar__support-text {
    display: block;
    margin-top: var(--space-xs);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    padding-left: var(--space-md);
}

.sidebar--collapsed .sidebar__support-link {
    justify-content: center;
    padding: var(--space-md);
}

.sidebar--collapsed .sidebar__support-link span {
    display: none;
}

.sidebar--collapsed .sidebar__support-text {
    display: none;
}

/* ----- Main Content ----- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--space-xl);
    background-color: var(--color-bg-secondary);
    min-height: calc(100vh - var(--header-height));
    transition: margin-left var(--transition-normal);
}

.main-content--collapsed {
    margin-left: var(--sidebar-width-collapsed);
}

.main-content--full {
    margin-left: 0;
}

/* ----- Footer ----- */
.app-footer {
    margin-left: var(--sidebar-width);
    padding: var(--space-lg) var(--space-xl);
    background-color: var(--color-bg-primary);
    border-top: 1px solid var(--color-border-medium);
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
}

.app-footer a {
    color: var(--color-text-secondary);
    text-decoration: underline;
}

.app-footer a:hover {
    color: var(--color-text-primary);
}

.app-footer--collapsed {
    margin-left: var(--sidebar-width-collapsed);
}

.app-footer--full {
    margin-left: 0;
}

/* ----- Buttons ----- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    line-height: 1;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn:hover {
    border-color: var(--color-interactive-primary);
    background-color: var(--color-bg-tertiary);
}

.btn:focus-visible {
    outline: 2px solid var(--color-interactive-primary);
    outline-offset: 2px;
}

.btn--primary {
    color: var(--color-bg-primary);
    background-color: var(--color-interactive-primary);
    border-color: var(--color-interactive-primary);
}

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

.btn--secondary {
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    border: 2px solid var(--color-interactive-primary);
}

.btn--secondary:hover {
    background-color: var(--color-bg-tertiary);
}

.btn--icon {
    padding: var(--space-sm);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
}

.btn--icon:hover {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.btn--text {
    border: none;
    background: transparent;
    font-weight: var(--font-bold);
    color: var(--color-text-secondary);
}

.btn--text:hover {
    color: var(--color-text-primary);
    background-color: var(--color-bg-tertiary);
}

.btn--lg {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--text-base);
}

.btn--danger {
    color: var(--color-danger);
    border-color: var(--color-danger);
    background-color: var(--color-bg-primary);
}

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

/* ----- Cards ----- */
.card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: border-color var(--transition-normal);
}

.card:hover {
    border-color: var(--color-interactive-primary);
}

.card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
}

.card__title {
    font-size: var(--text-xs);
    font-weight: var(--font-bold);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card__value {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
    line-height: 1.2;
}

.card__subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

/* Línea decorativa de cards */
.card__line {
    height: 2px;
    background-color: var(--color-interactive-primary);
    margin-top: var(--space-md);
}

.card__line--secondary {
    background-color: var(--color-border-dark);
}

.card__line--success {
    background-color: var(--color-success);
}

.card__line--danger {
    background-color: var(--color-danger);
}

.card__line--warning {
    background-color: var(--color-warning);
}

/* KPI Cards */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.kpi-card {
    position: relative;
    overflow: hidden;
}

.kpi-card--danger {
    border-left: 4px solid var(--color-danger);
}

.kpi-card--danger .card__value {
    color: var(--color-text-primary);
}

.kpi-card--warning {
    border-left: 4px solid var(--color-warning);
}

.kpi-card--warning .card__value {
    color: var(--color-text-primary);
}

.kpi-card--success .card__value {
    color: var(--color-text-primary);
}

.kpi-card__indicator {
    display: none;
}

.kpi-card__trend {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    margin-top: var(--space-xs);
}

.kpi-card__trend--up {
    color: var(--color-success);
}

.kpi-card__trend--down {
    color: var(--color-danger);
}

/* ----- Tables ----- */
.table-container {
    overflow-x: auto;
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.table th,
.table td {
    padding: var(--space-md);
    text-align: left;
}

.table th {
    background-color: var(--color-bg-primary);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
    text-transform: uppercase;
    font-size: var(--text-xs);
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-interactive-primary);
}

.table td {
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
}

.table tbody tr {
    transition: background-color var(--transition-normal);
}

.table tbody tr:hover {
    background-color: var(--color-bg-tertiary);
}

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

.table--striped tbody tr:nth-child(even) {
    background-color: var(--color-bg-secondary);
}

/* Fila con alerta */
.table tbody tr.table__row--danger {
    border-left: 4px solid var(--color-danger);
}

.table tbody tr.table__row--warning {
    border-left: 4px solid var(--color-warning);
}

/* ----- Charts ----- */
.chart-container {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    transition: border-color var(--transition-normal);
}

.chart-container:hover {
    border-color: var(--color-interactive-primary);
}

.chart-container__title {
    font-size: var(--text-base);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.chart-wrapper {
    position: relative;
    height: 300px;
}

/* ----- Form Elements ----- */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.form-input,
.form-select {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-family: inherit;
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-normal);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-interactive-primary);
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23495057' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-sm) center;
    padding-right: var(--space-xl);
}

/* ----- Modal ----- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay--visible {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: relative;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.modal-overlay--visible .modal {
    transform: scale(1);
}

.modal__close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    padding: var(--space-xs);
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-text-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal__close:hover {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.modal__content {
    padding: var(--space-xl);
    max-height: calc(90vh - var(--space-xl));
    overflow-y: auto;
}

.modal__title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.modal__actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: flex-end;
    margin-top: var(--space-lg);
}

/* ----- Toast ----- */
.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    z-index: 1100;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast--success {
    border-left: 4px solid var(--color-success);
}

.toast--error {
    border-left: 4px solid var(--color-danger);
}

.toast--warning {
    border-left: 4px solid var(--color-warning);
}

/* ----- Welcome Screen ----- */
.welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: var(--spacing-xl);
}

.welcome__icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-muted);
}

.welcome__title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.welcome__subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 400px;
}

/* Drop Zone */
.dropzone {
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-2xl);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    background-color: var(--color-bg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dropzone:hover,
.dropzone--active {
    border-color: var(--color-primary);
    background-color: var(--color-bg-secondary);
}

.dropzone__icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-text-muted);
}

.dropzone__text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.dropzone__hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.welcome__divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    max-width: 400px;
    margin: var(--spacing-lg) 0;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.welcome__divider::before,
.welcome__divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--color-border);
}

.welcome__buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    max-width: 400px;
}

@media (min-width: 480px) {
    .welcome__buttons {
        flex-direction: row;
        gap: var(--spacing-md);
    }

    .welcome__buttons .btn {
        flex: 1;
    }
}

/* ----- Section Headers ----- */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.section-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ----- Grid Layouts ----- */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

/* ----- Heatmap / Matrix ----- */
.matrix {
    overflow-x: auto;
}

.matrix-table {
    border-collapse: collapse;
    width: 100%;
}

.matrix-table th,
.matrix-table td {
    padding: var(--spacing-sm);
    text-align: center;
    border: 1px solid var(--color-border);
    min-width: 60px;
}

.matrix-table th {
    background-color: var(--color-bg-secondary);
    font-weight: 500;
    font-size: var(--font-size-xs);
}

.matrix-cell {
    cursor: pointer;
    transition: all var(--transition-fast);
}

.matrix-cell:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.matrix-cell--empty {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-muted);
}

/* ----- Evaluaciones List ----- */
.evaluaciones-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.evaluacion-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.evaluacion-item__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.evaluacion-item__title {
    font-weight: 500;
}

.evaluacion-item__meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ----- Badges ----- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

.badge--success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.badge--danger {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.badge--warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

/* ----- Loading ----- */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ----- Empty State ----- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--color-text-secondary);
}

.empty-state__icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-muted);
}

/* ----- Utilities ----- */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-muted {
    color: var(--color-text-secondary);
}

.text-sm {
    font-size: var(--text-sm);
}

.text-success {
    color: var(--color-success);
}

.text-danger {
    color: var(--color-danger);
}

.text-warning {
    color: var(--color-warning);
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden {
    display: none !important;
}

/* ----- Percentiles Row ----- */
.percentiles-row {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
}

.percentile-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    min-width: 60px;
}

.percentile-label {
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.percentile-value {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
}

/* ----- Responsive ----- */
@media (max-width: 768px) {
    .header__menu-btn {
        display: flex;
    }

    .header__title {
        font-size: var(--text-base);
    }

    .header__subtitle {
        display: none;
    }

    .sidebar {
        position: fixed;
        left: -100%;
        width: 280px;
        top: var(--header-height);
        bottom: 0;
        z-index: 200;
        transition: left var(--transition-normal);
    }

    .sidebar--open {
        left: 0;
    }

    .sidebar__collapse {
        display: none;
    }

    .main-content {
        margin-left: 0;
        padding: var(--space-md);
    }

    .main-content--collapsed {
        margin-left: 0;
    }

    .app-footer {
        margin-left: 0;
        padding: var(--space-md);
    }

    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid--2,
    .grid--3 {
        grid-template-columns: 1fr;
    }

    .chart-wrapper {
        height: 250px;
    }

    .modal {
        max-width: 100%;
        margin: var(--space-sm);
    }

    .toast-container {
        left: var(--space-md);
        right: var(--space-md);
        bottom: var(--space-md);
    }

    .toast {
        width: 100%;
    }
}

/* Overlay para móvil cuando sidebar está abierto */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    top: var(--header-height);
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 150;
}

.sidebar-overlay--visible {
    display: block;
}

@media (max-width: 480px) {
    .kpi-grid {
        grid-template-columns: 1fr;
    }

    .header__actions {
        gap: var(--space-xs);
    }

    .welcome {
        padding: var(--space-md);
    }

    .dropzone {
        padding: var(--space-lg);
    }
}

/* ----- Print Styles ----- */
@media print {
    .header,
    .sidebar,
    .modal-overlay,
    .toast-container,
    .btn {
        display: none !important;
    }

    .main-content {
        margin: 0;
        padding: 0;
    }

    .card {
        break-inside: avoid;
        border: 1px solid #000;
    }
}