/* CSS Variables */
:root {
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-secondary: #64748b;
    --color-danger: #dc2626;
    --color-danger-hover: #b91c1c;
    --color-success: #16a34a;
    --color-warning: #f59e0b;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-hover: #f1f5f9;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg-alt);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Header */
.header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-sm);
}

.header-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.header-tagline {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Privacy Banner */
.privacy-banner {
    background-color: #fef3c7;
    border-bottom: 1px solid #fde68a;
    padding: var(--spacing-sm) 0;
}

.privacy-banner .container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: #92400e;
}

.privacy-icon {
    flex-shrink: 0;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Main Grid */
main.container {
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-2xl);
}

.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}

/* Panel Styles */
.input-panel,
.dashboard-panel {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.input-panel h2,
.dashboard-panel h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

/* Debts Container */
.debts-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.debt-row {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    background-color: var(--color-bg-alt);
    transition: border-color 0.2s;
}

.debt-row:hover {
    border-color: var(--color-primary);
}

.debt-row-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.debt-row-title {
    font-weight: 600;
    color: var(--color-text);
}

.btn-remove {
    background: none;
    border: none;
    color: var(--color-danger);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-remove:hover {
    background-color: #fee2e2;
}

.debt-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

@media (max-width: 640px) {
    .debt-fields {
        grid-template-columns: 1fr;
    }
}

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

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.form-group input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-with-prefix {
    position: relative;
    display: flex;
    align-items: center;
}

.input-prefix {
    position: absolute;
    left: var(--spacing-md);
    color: var(--color-text-muted);
    font-weight: 500;
    pointer-events: none;
}

.input-with-prefix input {
    padding-left: 2rem;
    width: 100%;
}

/* Extra Payment Section */
.extra-payment-section {
    margin-bottom: var(--spacing-lg);
}

.extra-payment-section label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

/* Strategy Section */
.strategy-section {
    margin-bottom: var(--spacing-lg);
}

.section-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.strategy-toggle {
    display: flex;
    gap: var(--spacing-md);
}

.strategy-option {
    flex: 1;
    position: relative;
    cursor: pointer;
}

.strategy-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.strategy-label {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all 0.2s;
    background-color: var(--color-bg);
}

.strategy-option input[type="radio"]:checked + .strategy-label {
    border-color: var(--color-primary);
    background-color: rgba(37, 99, 235, 0.05);
}

.strategy-name {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.strategy-desc {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

@media (max-width: 640px) {
    .strategy-toggle {
        flex-direction: column;
    }
}

/* Actions Section */
.actions-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

@media (max-width: 640px) {
    .actions-section {
        grid-template-columns: 1fr;
    }
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

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

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

.btn-secondary {
    background-color: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

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

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

#add-debt-btn {
    width: 100%;
    margin-bottom: var(--spacing-lg);
}

/* Warning Message */
.warning-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: #fef3c7;
    border: 1px solid #fde68a;
    border-radius: var(--radius-md);
    color: #92400e;
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
}

/* Summary Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 640px) {
    .summary-cards {
        grid-template-columns: 1fr;
    }
}

.summary-card {
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.summary-card.primary {
    border-color: var(--color-primary);
    background-color: rgba(37, 99, 235, 0.05);
}

.card-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.card-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.card-sublabel {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.comparison-text {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

/* Progress Section */
.progress-section {
    margin-bottom: var(--spacing-xl);
}

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

.progress-label {
    font-weight: 600;
    color: var(--color-text);
}

.progress-percent {
    font-weight: 700;
    color: var(--color-primary);
}

.progress-bar {
    height: 24px;
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), #3b82f6);
    transition: width 0.5s ease;
    border-radius: var(--radius-lg);
}

.progress-markers {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.marker {
    position: absolute;
    top: 0;
    width: 2px;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.5);
}

.motivation-message {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-style: italic;
    text-align: center;
}

/* Chart Container */
.chart-container,
.interest-chart-container {
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.chart-container h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.chart-container canvas {
    max-height: 300px;
    height: 300px;
    width: 100%;
}

/* Comparison Section */
.comparison-section {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.comparison-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.interest-chart-container canvas {
    max-height: 250px;
    height: 250px;
    width: 100%;
}

.savings-message {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: #dcfce7;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius-md);
    color: #166534;
    font-weight: 600;
    text-align: center;
}

/* Breakdown Section */
.breakdown-section {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.breakdown-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.breakdown-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-border);
    transition: 0.3s;
    border-radius: 26px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

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

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

.breakdown-table-container {
    margin-top: var(--spacing-lg);
}

.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.breakdown-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.breakdown-table thead {
    background-color: var(--color-bg-alt);
}

.breakdown-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--color-text);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}

.breakdown-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

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

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

#show-more-btn {
    width: 100%;
}

/* Toast */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background-color: var(--color-text);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s;
    pointer-events: none;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

@media (max-width: 640px) {
    .toast {
        left: var(--spacing-md);
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }
}