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

:root {
    --primary-color: #00ABE4;
    --primary-dark: #0090C4;
    --primary-light: #33BCEA;
    --secondary-color: #00ABE4;
    --success-color: #00ABE4;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #00ABE4;
    --dark-bg: #00ABE4;
    --darker-bg: #0090C4;
    --light-bg: #E9F1FA;
    --card-bg: #FFFFFF;
    --text-dark: #333333;
    --text-light: #666666;
    --text-lighter: #999999;
    --border-color: #d0e5f5;
    --shadow-sm: 0 1px 2px 0 rgba(0, 171, 228, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 171, 228, 0.1), 0 2px 4px -1px rgba(0, 171, 228, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 171, 228, 0.1), 0 4px 6px -2px rgba(0, 171, 228, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 171, 228, 0.15), 0 10px 10px -5px rgba(0, 171, 228, 0.08);
    --shadow-hover: 0 20px 25px -5px rgba(0, 171, 228, 0.2), 0 10px 10px -5px rgba(0, 171, 228, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #E9F1FA;
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-dark);
    line-height: 1.6;
}

/* Pantallas */
.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* ===== LOGIN ===== */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-box {
    background: var(--card-bg);
    padding: 50px 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    border: 2px solid #00ABE4;
    backdrop-filter: blur(10px);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-box h1 {
    text-align: center;
    margin-bottom: 40px;
    color: #00ABE4;
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.login-divider {
    display: flex;
    align-items: center;
    margin: 20px 0;
    color: var(--text-light);
    font-size: 14px;
}

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

.login-divider span {
    padding: 0 15px;
    font-weight: 500;
}

/* ===== HEADER ===== */
.header {
    background: #00ABE4;
    backdrop-filter: blur(10px);
    color: white;
    padding: 24px 0;
    box-shadow: var(--shadow-md);
    border-bottom: 2px solid #0090C4;
    position: sticky;
    top: 0;
    z-index: 999;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    color: #FFFFFF;
    letter-spacing: -0.5px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(255, 255, 255, 0.15);
    padding: 10px 20px;
    border-radius: 50px;
    backdrop-filter: blur(5px);
}

.user-info span {
    font-weight: 600;
    font-size: 15px;
}

/* ===== TABS ===== */
.tabs {
    background: #FFFFFF;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    position: sticky;
    top: 76px;
    z-index: 100;
    border-bottom: 2px solid #d0e5f5;
}

.tabs .container {
    display: flex;
    gap: 0;
}

.tab-btn {
    flex: 1;
    padding: 18px 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-light);
    border-bottom: 3px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.tab-btn::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: #00ABE4;
    transform: scaleX(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-btn:hover {
    background: var(--light-bg);
    color: var(--primary-color);
}

.tab-btn.active {
    color: #00ABE4;
    background: linear-gradient(to bottom, rgba(0, 171, 228, 0.08), transparent);
}

.tab-btn.active::before {
    transform: scaleX(1);
}

/* ===== CONTAINER ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-content {
    padding: 30px 0;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ===== SECTION HEADER ===== */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px 0;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: #00ABE4;
    text-shadow: none;
    letter-spacing: -0.5px;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 14px;
    letter-spacing: 0.3px;
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: white;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: #00ABE4;
    box-shadow: 0 0 0 4px rgba(0, 171, 228, 0.1);
    transform: translateY(-1px);
}

.form-control:hover {
    border-color: var(--primary-light);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* ===== BUTTONS ===== */
.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.3px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: #00ABE4;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 171, 228, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 171, 228, 0.4);
    background: #0090C4;
}

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

.btn-secondary {
    background: #FFFFFF;
    color: #00ABE4;
    border: 2px solid #00ABE4;
    box-shadow: 0 4px 12px rgba(0, 171, 228, 0.15);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 171, 228, 0.25);
    background: #E9F1FA;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(239, 68, 68, 0.5);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.5);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 10px 20px;
    font-size: 14px;
}

/* ===== FILTROS ===== */
.filters {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.filters .form-control {
    max-width: 250px;
}

/* ===== GASTOS GRID ===== */
.gastos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.gasto-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.gasto-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: #00ABE4;
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.gasto-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.gasto-card:hover::before {
    transform: scaleX(1);
}

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

.gasto-nombre {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.3;
    letter-spacing: -0.3px;
}

.gasto-monto {
    font-size: 28px;
    font-weight: 800;
    color: #00ABE4;
    margin: 12px 0;
    letter-spacing: -0.5px;
}

.gasto-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.gasto-info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-light);
    padding: 8px 12px;
    background: var(--light-bg);
    border-radius: 8px;
}

.gasto-imagen {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 16px;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid var(--border-color);
}

.gasto-imagen:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.gasto-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.gasto-actions .btn {
    flex: 1;
    justify-content: center;
}

.categoria-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 171, 228, 0.1);
    color: #00ABE4;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid rgba(0, 171, 228, 0.3);
    margin-top: 8px;
}

/* ===== CATEGORÍAS GRID ===== */
.categorias-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.categoria-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 28px;
    box-shadow: var(--shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.categoria-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: #00ABE4;
}

.categoria-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.categoria-nombre {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
    letter-spacing: -0.3px;
}

.categoria-descripcion {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 20px;
    min-height: 50px;
    line-height: 1.6;
}

.categoria-actions {
    display: flex;
    gap: 12px;
}

/* ===== REPORTES ===== */
.reporte-filtros {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 20px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.filtro-periodo {
    margin-bottom: 24px;
}

.filtro-periodo label {
    display: block;
    margin-bottom: 16px;
    font-weight: 700;
    color: var(--text-dark);
    font-size: 16px;
    letter-spacing: -0.2px;
}

.btn-periodo {
    padding: 12px 24px;
    margin-right: 12px;
    margin-bottom: 12px;
    background: var(--light-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-dark);
}

.btn-periodo:hover {
    border-color: #00ABE4;
    color: #00ABE4;
    background: rgba(0, 171, 228, 0.08);
    transform: translateY(-2px);
}

.btn-periodo.active {
    background: #00ABE4;
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 171, 228, 0.4);
}

.filtro-personalizado {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

.filtro-personalizado label {
    font-weight: 700;
    color: var(--text-dark);
    font-size: 16px;
}

.filtro-personalizado .form-control {
    max-width: 200px;
}

/* ===== TOTALES ===== */
.totales-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.total-card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    text-align: center;
    border: 2px solid #E9F1FA;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.total-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: #00ABE4;
}

.total-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.total-card h3 {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

.total-amount {
    font-size: 40px;
    font-weight: 800;
    color: #00ABE4;
    letter-spacing: -1px;
}

/* ===== CATEGORÍA RESUMEN ===== */
.categoria-resumen {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    margin-bottom: 32px;
    border: 1px solid var(--border-color);
}

.categoria-resumen h3 {
    margin-bottom: 24px;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.categoria-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.categoria-resumen-item {
    background: var(--light-bg);
    padding: 20px;
    border-radius: 16px;
    border-left: 5px solid #00ABE4;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.categoria-resumen-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow);
}

.categoria-resumen-item h4 {
    font-size: 15px;
    color: var(--text-dark);
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: -0.2px;
}

.categoria-resumen-item .monto {
    font-size: 22px;
    font-weight: 800;
    color: #00ABE4;
    margin: 4px 0;
}

.categoria-resumen-item .cantidad {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 8px;
    font-weight: 600;
}

/* ===== REPORTE DETALLE ===== */
.reporte-detalle {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.reporte-detalle h3 {
    margin-bottom: 24px;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

/* ===== MODALS ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 171, 228, 0.1);
    backdrop-filter: blur(8px);
    overflow-y: auto;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
}

.modal-small {
    max-width: 500px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 28px 32px;
    border-bottom: 2px solid var(--border-color);
    background: rgba(0, 171, 228, 0.03);
}

.modal-header h2 {
    font-size: 24px;
    color: var(--text-dark);
    font-weight: 700;
    letter-spacing: -0.4px;
}

.modal-body {
    padding: 32px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 24px 32px;
    border-top: 2px solid var(--border-color);
    background: var(--light-bg);
}

.close {
    font-size: 32px;
    font-weight: bold;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.3s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
    transform: rotate(90deg);
}

form .modal-body {
    padding: 0;
}

form .form-group:first-child {
    margin-top: 32px;
}

form .form-group {
    padding: 0 32px;
}

.image-preview {
    margin-top: 16px;
    text-align: center;
}

.image-preview img {
    max-width: 100%;
    max-height: 250px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    border: 2px solid var(--border-color);
}

/* ===== MENSAJES ===== */
.error-message {
    color: var(--danger-color);
    font-size: 14px;
    margin-top: 16px;
    padding: 14px 16px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 12px;
    display: none;
    border-left: 4px solid var(--danger-color);
    font-weight: 500;
}

.error-message.show {
    display: block;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: #00ABE4;
    font-size: 18px;
}

.empty-state-icon {
    font-size: 80px;
    margin-bottom: 24px;
    opacity: 0.8;
}

/* ===== LOADING ===== */
.loading {
    text-align: center;
    padding: 60px;
    color: #00ABE4;
    font-size: 18px;
    font-weight: 600;
}

/* ===== FILTROS ===== */
.filters {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
    background: var(--card-bg);
    padding: 20px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.filters .form-control {
    max-width: 280px;
}

/* ===== BUSCADOR ===== */
.search-container {
    margin-bottom: 28px;
}

.search-input {
    width: 100%;
    padding: 16px 20px;
    font-size: 16px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    background: white;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.search-input:focus {
    border-color: #00ABE4;
    box-shadow: 0 0 0 4px rgba(0, 171, 228, 0.1);
    outline: none;
}

/* ===== DASHBOARD ===== */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--card-bg);
    padding: 28px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 20px;
    border: 2px solid #E9F1FA;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: #00ABE4;
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    font-size: 48px;
    opacity: 0.9;
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.stat-value {
    font-size: 28px;
    font-weight: 800;
    color: #00ABE4;
    letter-spacing: -0.5px;
}

/* ===== GRÁFICOS ===== */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.chart-card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.chart-card h3 {
    margin-bottom: 24px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    letter-spacing: -0.3px;
}

.chart-card canvas {
    max-height: 300px;
}

/* ===== GASTOS RECIENTES ===== */
.recent-expenses {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.recent-expenses h3 {
    margin-bottom: 24px;
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    letter-spacing: -0.3px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex !important;
        order: -1;
    }

    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 10px;
        position: relative;
    }

    .header h1 {
        font-size: 18px;
        flex: 1;
        text-align: left;
        margin: 0;
        padding-left: 10px;
    }

    /* Ocultar info de usuario en móvil */
    .user-info {
        display: none !important;
    }

    /* Menu lateral */
    .tabs {
        position: fixed;
        top: 0;
        left: -280px;
        width: 280px;
        height: 100vh;
        background: white;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        z-index: 999;
        transition: left 0.3s ease;
        overflow-y: auto;
        padding-top: 20px;
        border-bottom: none;
    }

    .tabs.active {
        left: 0;
    }

    .tabs .container {
        flex-direction: column;
        padding: 0;
    }

    .tab-btn {
        width: 100%;
        justify-content: flex-start;
        padding: 20px 24px;
        border-bottom: 1px solid var(--border-color);
        border-left: 4px solid transparent;
        border-radius: 0;
        font-size: 16px;
        text-align: left;
    }

    .tab-btn::before {
        display: none;
    }

    .tab-btn.active {
        background: rgba(0, 171, 228, 0.1);
        border-left-color: #00ABE4;
        color: #00ABE4;
    }

    .tab-btn:hover {
        background: rgba(0, 171, 228, 0.05);
    }

    /* Botón de logout en el menú móvil */
    .mobile-logout {
        margin-top: auto;
        background: rgba(239, 68, 68, 0.1);
        color: #ef4444;
        border-top: 2px solid var(--border-color);
        font-weight: 600;
    }

    .mobile-logout:hover {
        background: rgba(239, 68, 68, 0.15);
    }

    .mobile-logout.active {
        background: rgba(239, 68, 68, 0.15);
        border-left-color: #ef4444;
    }

    .section-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }

    .filters {
        flex-direction: column;
    }

    .filters .form-control {
        max-width: 100%;
    }

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

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

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

    .totales-container {
        grid-template-columns: 1fr;
    }

    .filtro-personalizado {
        flex-direction: column;
        align-items: stretch;
    }

    .filtro-personalizado .form-control {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }

    .header h1 {
        font-size: 20px;
    }

    .tab-btn {
        font-size: 14px;
        padding: 12px 15px;
    }

    .section-header h2 {
        font-size: 22px;
    }

    .total-amount {
        font-size: 24px;
    }

    .modal-content {
        margin: 10px;
    }

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

    .stats-container {
        grid-template-columns: 1fr;
    }

    .stat-card {
        padding: 20px;
    }

    .stat-icon {
        font-size: 36px;
    }

    .stat-value {
        font-size: 22px;
    }
}

/* ===== FOOTER ===== */
.footer {
    background: #00ABE4;
    color: white;
    padding: 15px 0;
    margin-top: 40px;
    border-top: 2px solid #0090C4;
    text-align: center;
}

.footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-text {
    margin: 0;
    font-size: 14px;
    font-weight: 500;
    opacity: 0.95;
    letter-spacing: 0.3px;
}

.footer-text::before {
    content: '💻 ';
}

/* ===== MENU HAMBURGUESA ===== */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: white;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    backdrop-filter: blur(2px);
}

.menu-overlay.active {
    display: block;
}

/* Ocultar botón de logout móvil en escritorio */
.mobile-logout {
    display: none;
}

@media (max-width: 768px) {
    .mobile-logout {
        display: flex;
    }
}