/* Tax Estimator - Cohesive UI Styles */

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-input: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #3b82f6;
    --accent-secondary: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #06b6d4;
    --border-color: #334155;
    --border-light: #475569;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0a0f1a 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 32px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #60a5fa 0%, #34d399 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    background: var(--bg-card);
    padding: 6px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.nav-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-tab.active {
    background: var(--accent-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.tab-icon {
    font-size: 1.1rem;
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

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

/* Global Settings */
.global-settings {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin-bottom: 24px;
}

.settings-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.setting label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Calculator Grid */
.calculator-grid {
    display: grid;
    gap: 20px;
}

.calculator-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
}

.card-header {
    margin-bottom: 24px;
}

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
}

input[type="number"],
select {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

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

.input-prefix .prefix {
    position: absolute;
    left: 14px;
    color: var(--text-muted);
    font-weight: 500;
}

.input-prefix input {
    padding-left: 32px;
}

small {
    display: block;
    margin-top: 6px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Radio Group */
.radio-group {
    display: flex;
    gap: 8px;
}

.radio-group.compact .radio {
    padding: 8px 12px;
    font-size: 0.9rem;
}

.radio {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 10px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.radio:hover {
    border-color: var(--border-light);
}

.radio input {
    margin-right: 8px;
    accent-color: var(--accent-primary);
}

.radio input:checked + span {
    color: var(--accent-primary);
    font-weight: 600;
}

.radio:has(input:checked) {
    border-color: var(--accent-primary);
    background: rgba(59, 130, 246, 0.1);
}

/* Deductions Section */
.deductions-section {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 20px 0;
}

.deductions-section h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

/* Buttons */
.btn-primary {
    width: 100%;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, #2563eb 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 8px;
}

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

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

/* Results Section */
.results {
    margin-top: 32px;
}

.results.hidden {
    display: none;
}

.results-header {
    margin-bottom: 24px;
}

.results-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Summary Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
}

.card.highlight {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(59, 130, 246, 0.1) 100%);
}

.card.highlight.success {
    border-color: var(--accent-secondary);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.card.highlight.info {
    border-color: var(--accent-info);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(6, 182, 212, 0.1) 100%);
}

.card-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.card.highlight.success .card-value {
    color: var(--accent-secondary);
}

.card.highlight.info .card-value {
    color: var(--accent-info);
}

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

/* Breakdown Grid */
.breakdown-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}

.breakdown-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.breakdown-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.breakdown-item:last-child {
    border-bottom: none;
}

.breakdown-item.total {
    margin-top: 8px;
    padding-top: 16px;
    border-top: 2px solid var(--border-light);
    border-bottom: none;
    font-weight: 600;
}

.breakdown-item.total .item-name,
.breakdown-item.total .item-value {
    color: var(--text-primary);
    font-size: 1.05rem;
}

.item-name {
    color: var(--text-secondary);
}

.item-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* Bracket Info */
.bracket-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

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

.bracket-row span:first-child {
    color: var(--text-secondary);
}

.rate-badge {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Tax Compare Banner */
.tax-compare-banner {
    display: flex;
    align-items: center;
    gap: 16px;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    margin: 24px 0;
}

.tax-compare-banner.refund {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
    border-color: rgba(16, 185, 129, 0.3);
}

.tax-compare-banner.owe {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.05) 100%);
    border-color: rgba(239, 68, 68, 0.3);
}

.compare-icon {
    font-size: 1.5rem;
}

.compare-text {
    color: var(--text-primary);
}

.compare-text strong {
    display: block;
    margin-bottom: 4px;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 20px 16px;
    }

    h1 {
        font-size: 2rem;
    }

    .nav-tabs {
        flex-wrap: wrap;
    }

    .nav-tab {
        padding: 10px 12px;
        font-size: 0.85rem;
    }

    .tab-label {
        display: none;
    }

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

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

    .calculator-card {
        padding: 20px;
    }

    .summary-cards {
        grid-template-columns: 1fr;
    }

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

    .card-value {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }

    .nav-tab {
        flex: 1;
        min-width: 60px;
    }
}