/* Income Tax Calculator - Clean Design matching Advance Tax Calculator */

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

:root {
    --primary: #1e3a8a;
    --primary-hover: #2563eb;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: white;
    padding: 2rem 0;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.logo p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.branding {
    text-align: right;
}

.branding h2 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.15rem;
}

.branding p {
    font-size: 0.85rem;
    opacity: 0.9;
}

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

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border: 1px solid var(--border);
}

.card h2 {
    font-size: 1.25rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card h3 {
    font-size: 1.1rem;
    color: var(--text);
    margin: 1.5rem 0 1rem;
    font-weight: 600;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    transition: transform 0.2s;
    font-family: 'Inter', sans-serif;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(30, 58, 138, 0.3);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.summary-item {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid #bfdbfe;
}

.summary-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.summary-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.summary-value.large {
    font-size: 2rem;
}

.alert {
    background: #fef3c7;
    border: 1px solid #fcd34d;
    color: #92400e;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.alert strong {
    display: block;
    margin-bottom: 0.25rem;
}

.info-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1e40af;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    line-height: 1.6;
}

.info-box strong {
    display: inline;
}

.regime-toggle {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.regime-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    background: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.3s;
    font-family: 'Inter', sans-serif;
}

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

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

.breakdown-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.breakdown-table th,
.breakdown-table td {
    text-align: left;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.breakdown-table th {
    font-weight: 600;
    color: var(--text);
    background: var(--bg);
    font-size: 0.9rem;
}

.breakdown-table td {
    font-size: 0.95rem;
}

.breakdown-table tr:last-child td {
    border-bottom: none;
    font-weight: 700;
    color: var(--primary);
    font-size: 1rem;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        padding: 0 1rem;
    }

    .branding {
        text-align: center;
    }

    .logo h1 {
        font-size: 1.4rem;
    }

    .container {
        padding: 0 1rem;
        margin: 1rem auto;
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

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

    .regime-toggle {
        flex-direction: column;
    }

    .breakdown-table {
        font-size: 0.85rem;
    }

    .breakdown-table th,
    .breakdown-table td {
        padding: 0.6rem 0.4rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 1.5rem 0;
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    .logo p,
    .branding h2 {
        font-size: 0.85rem;
    }

    .branding p {
        font-size: 0.75rem;
    }

    .card {
        padding: 1rem;
    }

    .card h2 {
        font-size: 1.1rem;
    }

    .form-group input,
    .form-group select {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .summary-value {
        font-size: 1.25rem;
    }

    .summary-value.large {
        font-size: 1.5rem;
    }
}