/* =====================================================
   SISTEMA FINANCIERO PERSONAL
   Estilos principales
   ===================================================== */

:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #3498db;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --gray-color: #95a5a6;
    --white: #ffffff;
    --sidebar-width: 280px;
    --header-height: 70px;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
    background-color: #f8f9fa;
    color: var(--dark-color);
    line-height: 1.6;
}

/* =====================================================
   SIDEBAR
   ===================================================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 20px;
    z-index: 1000;
    overflow-y: auto;
    transition: var(--transition);
}

.sidebar-header {
    text-align: center;
    padding: 20px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
}

.sidebar-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.sidebar-header span {
    font-size: 0.85rem;
    opacity: 0.8;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 5px;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    color: var(--white);
    text-decoration: none;
    border-radius: 10px;
    transition: var(--transition);
    font-weight: 500;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(5px);
}

.sidebar-menu a i {
    width: 24px;
    text-align: center;
    font-size: 1.1rem;
}

.sidebar-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 20px 0;
}

/* =====================================================
   MAIN CONTENT
   ===================================================== */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    padding: 30px;
    transition: var(--transition);
}

/* =====================================================
   HEADER
   ===================================================== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.page-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
}

.page-header .date-display {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--white);
    padding: 12px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    font-weight: 500;
}

/* =====================================================
   CARDS
   ===================================================== */
.card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 25px;
    margin-bottom: 25px;
    transition: var(--transition);
    border: none;
}

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

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light-color);
}

.card-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-header h3 i {
    color: var(--primary-color);
}

/* =====================================================
   STAT CARDS (Dashboard)
   ===================================================== */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
}

.stat-card.income::before {
    background: var(--success-color);
}

.stat-card.expense::before {
    background: var(--danger-color);
}

.stat-card.balance::before {
    background: var(--info-color);
}

.stat-card.savings::before {
    background: var(--warning-color);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card .icon {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-card.income .icon {
    background: rgba(46, 204, 113, 0.15);
    color: var(--success-color);
}

.stat-card.expense .icon {
    background: rgba(231, 76, 60, 0.15);
    color: var(--danger-color);
}

.stat-card.balance .icon {
    background: rgba(52, 152, 219, 0.15);
    color: var(--info-color);
}

.stat-card.savings .icon {
    background: rgba(243, 156, 18, 0.15);
    color: var(--warning-color);
}

.stat-card .info h4 {
    font-size: 0.9rem;
    color: var(--gray-color);
    font-weight: 500;
    margin-bottom: 5px;
}

.stat-card .info .amount {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
}

.stat-card .info .change {
    font-size: 0.85rem;
    margin-top: 5px;
}

.stat-card .info .change.positive {
    color: var(--success-color);
}

.stat-card .info .change.negative {
    color: var(--danger-color);
}

/* =====================================================
   FORMS
   ===================================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--light-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1);
}

.form-control::placeholder {
    color: var(--gray-color);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2395a5a6' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
}

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

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(67, 97, 238, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    color: var(--white);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(46, 204, 113, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: var(--white);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(231, 76, 60, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, #f39c12, #e67e22);
    color: var(--white);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* =====================================================
   TABLES
   ===================================================== */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

.table th,
.table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--light-color);
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
    color: var(--dark-color);
    white-space: nowrap;
}

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

.table tbody tr:hover {
    background: #f8f9fa;
}

.table .amount {
    font-weight: 700;
}

.table .amount.income {
    color: var(--success-color);
}

.table .amount.expense {
    color: var(--danger-color);
}

.table .actions {
    display: flex;
    gap: 8px;
}

.table .actions .btn {
    padding: 6px 12px;
    font-size: 0.85rem;
}

/* =====================================================
   BADGES
   ===================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(46, 204, 113, 0.15);
    color: var(--success-color);
}

.badge-danger {
    background: rgba(231, 76, 60, 0.15);
    color: var(--danger-color);
}

.badge-warning {
    background: rgba(243, 156, 18, 0.15);
    color: var(--warning-color);
}

.badge-info {
    background: rgba(52, 152, 219, 0.15);
    color: var(--info-color);
}

/* =====================================================
   CHARTS
   ===================================================== */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

.chart-container.small {
    height: 200px;
}

/* =====================================================
   ALERTS / NOTIFICATIONS
   ===================================================== */
.alert {
    padding: 16px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-warning {
    background: rgba(243, 156, 18, 0.15);
    border-left: 4px solid var(--warning-color);
    color: #b7791f;
}

.alert-success {
    background: rgba(46, 204, 113, 0.15);
    border-left: 4px solid var(--success-color);
    color: #276749;
}

.alert-danger {
    background: rgba(231, 76, 60, 0.15);
    border-left: 4px solid var(--danger-color);
    color: #c53030;
}

.alert-info {
    background: rgba(52, 152, 219, 0.15);
    border-left: 4px solid var(--info-color);
    color: #2b6cb0;
}

.alert i {
    font-size: 1.3rem;
}

/* =====================================================
   PAYMENT REMINDERS
   ===================================================== */
.payment-list {
    list-style: none;
}

.payment-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 10px;
    background: #f8f9fa;
    transition: var(--transition);
}

.payment-item:hover {
    background: var(--light-color);
}

.payment-item .icon {
    width: 45px;
    height: 45px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.payment-item .details {
    flex: 1;
}

.payment-item .details h5 {
    font-size: 1rem;
    margin-bottom: 3px;
}

.payment-item .details span {
    font-size: 0.85rem;
    color: var(--gray-color);
}

.payment-item .amount {
    font-weight: 700;
    font-size: 1.1rem;
}

.payment-item.urgent {
    border-left: 4px solid var(--danger-color);
}

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

/* =====================================================
   PROGRESS BARS (Savings Goals)
   ===================================================== */
.progress-container {
    margin-bottom: 20px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.progress-header span {
    font-weight: 600;
}

.progress-bar-wrapper {
    height: 12px;
    background: var(--light-color);
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    border-radius: 10px;
    transition: width 0.5s ease;
}

.progress-bar.success {
    background: linear-gradient(90deg, #2ecc71, #27ae60);
}

.progress-bar.warning {
    background: linear-gradient(90deg, #f39c12, #e67e22);
}

.progress-bar.danger {
    background: linear-gradient(90deg, #e74c3c, #c0392b);
}

/* =====================================================
   MODAL
   ===================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.modal {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: var(--transition);
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.modal-header h3 {
    font-size: 1.4rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-color);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--danger-color);
}

/* =====================================================
   GRID LAYOUT
   ===================================================== */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

/* =====================================================
   UTILITY CLASSES
   ===================================================== */
.text-center {
    text-align: center;
}

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

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

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

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

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

.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }
.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }

.flex {
    display: flex;
}

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

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

.gap-10 {
    gap: 10px;
}

.gap-20 {
    gap: 20px;
}

/* =====================================================
   EMPTY STATE
   ===================================================== */
.empty-state {
    text-align: center;
    padding: 50px 20px;
}

.empty-state i {
    font-size: 4rem;
    color: var(--light-color);
    margin-bottom: 20px;
}

.empty-state h4 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.empty-state p {
    color: var(--gray-color);
    margin-bottom: 20px;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 1200px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

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

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

@media (max-width: 768px) {
    .stat-cards {
        grid-template-columns: 1fr;
    }

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

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .table th,
    .table td {
        padding: 10px;
        font-size: 0.9rem;
    }
}

/* =====================================================
   MOBILE MENU TOGGLE
   ===================================================== */
.menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 10px;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: var(--shadow);
}

@media (max-width: 992px) {
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* =====================================================
   ANIMATIONS
   ===================================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* =====================================================
   SCROLLBAR
   ===================================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gray-color);
    border-radius: 4px;
}

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