:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    
    --green: #10b981;
    --green-light: #ecfdf5;
    --red: #f43f5e;
    --red-light: #fff1f2;
    --blue: #3b82f6;
    --blue-light: #eff6ff;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --radius: 12px;
    --transition: all 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    overflow-x: hidden;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

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

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--primary);
}

/* Cards & Layout */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 992px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-footer {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Specific Card Styles */
.card-balance h2 { color: var(--text-main); }
.card-income h2 { color: var(--green); }
.card-expense h2 { color: var(--red); }

.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-blue { color: var(--blue); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 0.95rem;
}

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

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

.btn-outline-danger {
    background: transparent;
    border: 1px solid var(--red);
    color: var(--red);
}

.btn-outline-danger:hover {
    background: var(--red-light);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
}

.btn-outline:hover {
    background: var(--bg-main);
    color: var(--text-main);
}

/* Table */
.transactions-section {
    margin-top: 1rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.section-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

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

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

th {
    text-align: left;
    padding: 1rem;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
    border-bottom: 2px solid var(--border);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

tr:hover td {
    background-color: #f8fafc;
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-income {
    background: var(--green-light);
    color: var(--green);
}

.badge-expense {
    background: var(--red-light);
    color: var(--red);
}

.amount-income { color: var(--green); font-weight: 600; }
.amount-expense { color: var(--red); font-weight: 600; }

.actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    background: transparent;
    color: var(--text-muted);
    transition: var(--transition);
}

.btn-edit:hover { background: var(--blue-light); color: var(--blue); }
.btn-delete:hover { background: var(--red-light); color: var(--red); }

/* Chart Controls */
.chart-container {
    height: 300px;
    position: relative;
}

.chart-legend {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.bg-green { background-color: var(--green); }
.bg-red { background-color: var(--red); }

/* Filters */
.filter-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-control, select, input {
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: white;
    font-size: 0.95rem;
    width: 100%;
}

.form-control:focus, select:focus, input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

/* Analysis Filters & Switches */
.analysis-filters {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-main);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.filter-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-weight: 500;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.switch-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-main);
}

.switch-container input {
    display: none;
}

.switch {
    position: relative;
    width: 36px;
    height: 20px;
    background-color: #cbd5e1;
    border-radius: 20px;
    transition: var(--transition);
}

.switch::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: var(--transition);
}

input:checked + .switch {
    background-color: var(--primary);
}

input:checked + .switch::after {
    left: 19px;
}

.summary-indicators {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.badge-info {
    background: var(--blue-light);
    color: var(--blue);
    border: 1px dashed var(--blue);
}

.mt-1 { margin-top: 1rem; }

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.empty-state i {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
}

.hidden { display: none; }

.month-indicator {
    background: var(--blue-light);
    color: var(--blue);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
}

/* Login Screen Styles */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #4f46e5 0%, #3b82f6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: 20px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: cardPop 0.4s ease-out;
}

@keyframes cardPop {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-logo {
    width: 64px;
    height: 64px;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.login-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: #64748b;
    font-size: 0.95rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
    padding: 1rem;
    margin-top: 1rem;
}

.login-error {
    margin-top: 1.5rem;
    background: #fef2f2;
    color: #ef4444;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    text-align: center;
    font-weight: 600;
    border: 1px solid #fee2e2;
}

.blur-hidden {
    filter: blur(20px);
    pointer-events: none;
    user-select: none;
    opacity: 0;
}

.login-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

#main-app.visible {
    filter: blur(0);
    pointer-events: all;
    user-select: auto;
    opacity: 1;
    transition: all 0.5s ease;
}