:root {
    --primary-color: #0891b2;
    --primary-hover: #0e7490;
    --success-color: #14b8a6;
    --danger-color: #dc2626;
    --warning-color: #f59e0b;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #cbd5e1;
    --bg-primary: #ffffff;
    --bg-secondary: #f1f5f9;
    --card-bg: #f8fafc;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 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);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: #e0f2fe;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-lg);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

/* Income Section */
.income-input-group {
    margin-bottom: 24px;
}

.radio-group {
    display: flex;
    gap: 24px;
    margin-bottom: 16px;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 500;
}

.radio-group input[type="radio"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
}

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

.currency-symbol {
    position: absolute;
    left: 16px;
    font-weight: 600;
    color: var(--text-secondary);
    pointer-events: none;
}

input[type="number"] {
    width: 100%;
    padding: 12px 16px 12px 40px;
    font-size: 1.1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input-label {
    position: absolute;
    right: 16px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    pointer-events: none;
}

.hours-input {
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.hours-input label {
    font-weight: 500;
    white-space: nowrap;
}

.hours-input input {
    max-width: 120px;
}

.input-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

.income-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

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

.breakdown-item .label {
    font-weight: 600;
    color: var(--text-secondary);
}

.breakdown-item .value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Payments Section */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.section-header h2 {
    margin-bottom: 0;
}

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

.btn-compare {
    background: var(--warning-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-compare:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.payments-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.payment-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 2px solid var(--border-color);
    transition: all 0.2s;
    gap: 12px;
}

.payment-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.payment-checkbox {
    display: flex;
    align-items: center;
}

.payment-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.payment-info {
    flex: 1;
}

.payment-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.payment-frequency {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.payment-impact {
    text-align: right;
    margin-right: 20px;
}

.payment-actions {
    display: flex;
    gap: 8px;
}

.btn-savings {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-savings:hover {
    background: #0d9488;
    transform: scale(1.05);
}

.payment-amount {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--danger-color);
    margin-bottom: 4px;
}

.payment-yearly {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.delete-btn {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.delete-btn:hover {
    background: #dc2626;
    transform: scale(1.05);
}

/* Summary Section */
.section-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.hours-breakdown-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.hours-breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 2px solid var(--border-color);
}

.hours-breakdown-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.hours-breakdown-details {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

.hours-needed {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.hours-breakdown-amount {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.hours-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.hours-summary-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hours-summary-item .label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hours-summary-item .value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Summary Section */
.summary-card {
    padding: 24px;
    border-radius: 8px;
    margin-bottom: 16px;
    text-align: center;
}

.summary-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    opacity: 0.8;
}

.summary-card .amount {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.summary-card .percentage {
    font-size: 1.2rem;
    font-weight: 600;
}

.total-remaining {
    background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%);
    color: white;
}

.total-spent {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.impact-breakdown {
    margin-top: 24px;
}

.impact-breakdown h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.impact-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.impact-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.impact-bar-container {
    flex: 1;
    height: 24px;
    background: var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    margin: 0 16px;
    position: relative;
}

.impact-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--danger-color), #dc2626);
    transition: width 0.3s ease;
}

.impact-percentage {
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 60px;
    text-align: right;
}

.impact-name {
    font-weight: 600;
    min-width: 150px;
}

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

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.5rem;
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
    transition: color 0.2s;
}

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

.modal-body {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px 12px 40px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.2s;
}

.form-group select {
    padding: 12px 16px;
}

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

.modal-footer {
    padding: 20px 24px;
    border-top: 2px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* Savings Calculator Modal */
.savings-modal {
    max-width: 700px;
}

.combined-savings-modal {
    max-width: 800px;
}

.combined-summary,
.combined-totals {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.combined-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.combined-stat .label {
    font-weight: 600;
    color: var(--text-secondary);
}

.combined-stat .value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.combined-stat.alternative .value {
    color: var(--success-color);
}

.combined-payments-list {
    margin-bottom: 20px;
}

.combined-payments-list h5 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.combined-payment-item {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 12px;
    border: 2px solid var(--border-color);
}

.combined-payment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.combined-payment-name {
    font-weight: 600;
    font-size: 1.05rem;
}

.combined-payment-current {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.combined-payment-input {
    display: flex;
    align-items: center;
    gap: 12px;
}

.combined-payment-input label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.combined-payment-input .input-wrapper {
    flex: 1;
    max-width: 200px;
}

.combined-payment-input input {
    padding: 8px 12px 8px 32px;
}

.savings-title {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 24px;
    text-align: center;
}

.savings-comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    margin-bottom: 32px;
    align-items: center;
}

.current-cost-card,
.alternative-cost-card {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    border: 2px solid var(--border-color);
}

.current-cost-card h5,
.alternative-cost-card h5 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--text-secondary);
    text-align: center;
}

.cost-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--danger-color);
    text-align: center;
    margin-bottom: 4px;
}

.cost-frequency {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.cost-yearly,
.cost-hours {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-top: 1px solid var(--border-color);
}

.cost-yearly .label,
.cost-hours .label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.cost-yearly .value,
.cost-hours .value {
    font-weight: 600;
    color: var(--text-primary);
}

.arrow-divider {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: bold;
}

.savings-results {
    background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%);
    padding: 24px;
    border-radius: 12px;
    color: white;
}

.savings-results h5 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    text-align: center;
}

.savings-results h6 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    margin-top: 20px;
}

.savings-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.savings-stat {
    background: rgba(255, 255, 255, 0.15);
    padding: 16px;
    border-radius: 8px;
    text-align: center;
}

.savings-stat.highlight {
    background: rgba(255, 255, 255, 0.25);
}

.stat-label {
    font-size: 0.85rem;
    opacity: 0.9;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

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

.long-term-projections {
    background: rgba(255, 255, 255, 0.15);
    padding: 16px;
    border-radius: 8px;
}

.projection-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.projection-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.projection-period {
    font-size: 0.95rem;
    opacity: 0.9;
}

.projection-amount {
    font-size: 1.2rem;
    font-weight: 700;
}

.savings-insights {
    margin-top: 20px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 8px;
}

.insight-item {
    margin-bottom: 12px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.insight-item:last-child {
    margin-bottom: 0;
}

.insight-highlight {
    font-weight: 700;
    font-size: 1.05rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    section {
        padding: 20px;
    }

    .radio-group {
        flex-direction: column;
        gap: 12px;
    }

    .income-breakdown {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }

    .section-header h2 {
        margin-bottom: 0;
    }

    .payment-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .payment-impact {
        text-align: left;
        margin-right: 0;
        width: 100%;
    }

    .delete-btn {
        width: 100%;
    }

    .summary-card .amount {
        font-size: 2rem;
    }

    .impact-item {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .impact-bar-container {
        margin: 8px 0;
    }

    .impact-name,
    .impact-percentage {
        min-width: auto;
        text-align: left;
    }
    
    .hours-summary {
        grid-template-columns: 1fr;
    }
    
    .hours-breakdown-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .hours-breakdown-details {
        align-items: flex-start;
        width: 100%;
    }
    
    .savings-comparison {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .arrow-divider {
        transform: rotate(90deg);
        text-align: center;
    }
    
    .savings-grid {
        grid-template-columns: 1fr;
    }
    
    .payment-item {
        flex-wrap: wrap;
    }
    
    .payment-actions {
        width: 100%;
        margin-top: 8px;
    }
    
    .btn-savings,
    .delete-btn {
        flex: 1;
    }
    
    .section-header {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }

    .section-header h2 {
        margin-bottom: 0;
    }
    
    .header-actions {
        flex-direction: column;
    }
    
    .combined-payment-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .combined-payment-input {
        flex-direction: column;
        align-items: stretch;
    }
    
    .combined-payment-input .input-wrapper {
        max-width: 100%;
    }
}