/* ===== VARIABLES ===== */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #6366f1;
    --secondary-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --light-bg: #f8fafc;
    --card-bg: #ffffff;
    --card-bg-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --border-color-light: #cbd5e1;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* ===== HEADER ===== */
.dashboard-header {
    background: var(--card-bg);
    border-bottom: 2px solid var(--primary-color);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow);
    font-size: 1.5rem;
}

.logo-text h1 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.user-select {
    padding: 0.6rem 1rem;
    background: var(--light-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
    outline: none;
    min-width: 160px;
}

.user-select:hover {
    border-color: var(--primary-color);
    background: var(--card-bg);
    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.1);
}

.user-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.btn-refresh {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: 0.9rem;
    white-space: nowrap;
}

.btn-refresh i {
    font-size: 0.9rem;
}

.btn-refresh:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-refresh:active {
    transform: translateY(0);
}

/* ===== INDICADOR DE CARGA ===== */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    gap: 1rem;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* ===== CONTENIDO PRINCIPAL ===== */
.dashboard-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* ===== TARJETAS ===== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-color-light);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    margin-bottom: 1.5rem;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.3rem;
}

.header-title i {
    color: var(--primary-color);
    flex-shrink: 0;
    font-size: 1.2rem;
}

.card-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-left: 2.5rem;
}

/* ===== TARJETAS DE RESUMEN ===== */
.summary-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.card-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    flex-shrink: 0;
    transition: var(--transition);
    font-size: 1.8rem;
}

.stat-card:hover .card-icon {
    transform: scale(1.05);
}

.card-icon.blue {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.2), rgba(79, 70, 229, 0.1));
    color: var(--primary-color);
}

.card-icon.green {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
    color: var(--success-color);
}

.card-icon.yellow {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.1));
    color: var(--warning-color);
}

.card-icon.red {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.1));
    color: var(--danger-color);
}

.card-content {
    flex: 1;
}

.card-content h3 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.4rem;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* ===== SECCIÓN DE GRÁFICOS ===== */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-card {
    min-height: 400px;
}

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

/* ===== TABLA DE SESIONES ===== */
.sessions-section {
    margin-bottom: 2rem;
}

.table-container {
    overflow-x: auto;
}

.sessions-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.sessions-table thead {
    background: var(--light-bg);
    position: sticky;
    top: 0;
}

.sessions-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
}

.sessions-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.sessions-table tbody tr {
    transition: background 0.2s;
}

.sessions-table tbody tr {
    cursor: pointer;
}

.sessions-table tbody tr:hover {
    background: linear-gradient(90deg, rgba(79, 70, 229, 0.04), rgba(79, 70, 229, 0.08));
    box-shadow: inset 0 0 0 1px rgba(79, 70, 229, 0.1);
}

/* Etiquetas de Estado */
.status-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
}

.status-completed {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.status-active {
    background: rgba(6, 182, 212, 0.2);
    color: var(--secondary-color);
}

.status-error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

/* Contador de Bostezos */
.yawn-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    padding: 0.4rem 0.8rem;
    background: rgba(99, 102, 241, 0.1);
    color: #6366f1;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    border: 2px solid rgba(99, 102, 241, 0.3);
}

/* Botón de Acción */
.btn-view {
    padding: 0.5rem 1.2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-view:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-view:active {
    transform: translateY(0);
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(8px);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--card-bg);
    margin: 5% auto;
    padding: 0;
    border-radius: 12px;
    max-width: 800px;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--light-bg);
}

.modal-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.modal-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.modal-title h2 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close-modal {
    background: var(--light-bg);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.close-modal i {
    font-size: 1.2rem;
}

.close-modal:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.05);
    border-color: var(--danger-color);
    transform: scale(1.05);
}

.modal-body {
    padding: 1.5rem;
    max-height: calc(80vh - 100px);
    overflow-y: auto;
}

.detail-section {
    margin-bottom: 2rem;
}

.detail-section:last-child {
    margin-bottom: 0;
}

.detail-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.detail-item {
    background: var(--light-bg);
    padding: 1.2rem;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.detail-item:hover {
    border-color: var(--primary-color);
    background: rgba(79, 70, 229, 0.02);
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.08);
}

.detail-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.detail-value {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

/* ===== MENSAJE DE ERROR ===== */
.error-message {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
}

.error-content {
    text-align: center;
    max-width: 500px;
    background: var(--card-bg);
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.error-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--danger-color);
    font-size: 2.5rem;
}

.error-content h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.error-content p {
    margin-bottom: 2rem;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

.btn-retry {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
}

.btn-retry i {
    font-size: 1rem;
}

.btn-retry:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .charts-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .dashboard-header {
        padding: 1rem;
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }

    .logo-icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .logo-text h1 {
        font-size: 1.4rem;
    }

    .header-actions {
        width: 100%;
        justify-content: space-between;
    }

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

    .stat-card {
        padding: 1.2rem;
    }

    .stat-value {
        font-size: 1.8rem;
    }

    .charts-section {
        grid-template-columns: 1fr;
    }

    .dashboard-container {
        padding: 1rem;
    }

    .sessions-table {
        font-size: 0.8rem;
    }

    .sessions-table th,
    .sessions-table td {
        padding: 0.5rem;
    }

    .modal-content {
        margin: 10% 1rem;
        max-width: calc(100% - 2rem);
    }

    .modal-header {
        padding: 1.2rem;
    }

    .modal-body {
        padding: 1.2rem;
    }

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

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color-light);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}