:root {
    --primary-color: #0056b3;
    --primary-hover: #004494;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --text-color: #333333;
    --border-color: #dddddd;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    width: 100%;
}

.hidden { display: none !important; }
.text-right { text-align: right; }

/* Ads */
.ad-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    width: 100%;
}
.ad-top { min-height: 90px; }
.ad-sidebar { display: none; }
.ad-skyscraper { width: 160px; min-height: 600px; }

/* Header */
.site-header {
    background-color: var(--card-bg);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
    margin-bottom: 20px;
}

.header-layout {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

/* Logo Styling for 1024x576 Landscape */
.site-logo {
    display: block;
    width: auto;
    height: auto;
    max-width: 280px;
    max-height: 160px;
    object-fit: contain;
}

.site-header h1 { font-size: 1.5rem; color: var(--primary-color); margin-bottom: 5px; }
.site-header p { font-size: 0.95rem; color: #666; }
.badge {
    background: var(--primary-color);
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    vertical-align: middle;
}

/* Layout */
.main-content {
    display: flex;
    gap: 20px;
    flex-grow: 1;
    justify-content: center;
}
.calculator-wrapper { flex: 1; max-width: 650px; width: 100%; }

/* Form Card */
.calculator-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 30px;
}

.form-group { margin-bottom: 15px; }
.form-row { display: flex; gap: 15px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 140px; }

label { display: block; margin-bottom: 5px; font-weight: 600; font-size: 0.9rem; }
input[type="number"], input[type="text"], select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
}
.hint { font-size: 0.8rem; color: #777; }

/* Advanced Settings Styling */
.advanced-toggle-wrapper {
    margin-bottom: 15px;
    text-align: center;
}
.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
}
.btn-link:hover { text-decoration: underline; }
.advanced-settings {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid #eee;
}
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-weight: 400;
    cursor: pointer;
}
input[type="checkbox"] { width: auto; transform: scale(1.2); }

/* Buttons */
button.btn-calculate {
    width: 100%;
    padding: 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
}
button.btn-calculate:hover { background-color: var(--primary-hover); }

/* Results */
.results-container { animation: fadeIn 0.5s ease-in; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.results-title { margin-bottom: 15px; font-size: 1.3rem; }
.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 20px;
}
.result-card {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    text-align: center;
}
.result-card.primary { background-color: #e3f2fd; border-color: #bbdefb; }
.result-card h3 { font-size: 0.9rem; color: #666; margin-bottom: 5px; }
.result-card .amount { font-size: 1.4rem; font-weight: bold; color: var(--primary-color); }

/* Tables */
.breakdown-table {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 0; border-bottom: 1px solid #eee; }
.negative td, .deduction-row td { color: var(--danger-color); }
.total-row td { border-bottom: none; padding-top: 15px; font-size: 1.1rem; }

/* Chart */
.summary-block {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.bar-track {
    background-color: var(--danger-color);
    height: 25px;
    border-radius: 12px;
    overflow: hidden;
    margin: 8px 0;
}
.bar-fill {
    background-color: var(--success-color);
    height: 100%;
    width: 0%;
    transition: width 1s ease-out;
}
.bar-label { font-size: 0.85rem; display: flex; justify-content: space-between; }

/* SEO Content */
.seo-content {
    margin-top: 40px;
    background: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.seo-content h2 { font-size: 1.6rem; margin-bottom: 25px; color: var(--text-color); }
.seo-content h3 { font-size: 1.3rem; margin-top: 30px; margin-bottom: 15px; color: var(--primary-color); }
.seo-content h4 { font-size: 1.1rem; margin-top: 20px; margin-bottom: 10px; color: #444; }
.seo-content p { margin-bottom: 15px; font-size: 1rem; color: #444; }
.seo-content ul { margin-bottom: 20px; padding-left: 20px; }
.seo-content li { margin-bottom: 8px; }

/* Content Table Styling */
.table-wrapper { overflow-x: auto; margin-bottom: 20px; }
.seo-content table { width: 100%; border-collapse: collapse; min-width: 300px; }
.seo-content th { background-color: #f8f9fa; text-align: left; padding: 10px; border-bottom: 2px solid #ddd; }
.seo-content td { padding: 10px; border-bottom: 1px solid #eee; }

/* Footer */
.site-footer {
    margin-top: auto;
    background: #333;
    color: #bbb;
    padding: 40px 0 20px;
    text-align: center;
    font-size: 0.9rem;
}

.footer-seo-links {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid #444;
}

.footer-seo-links h4 {
    color: #fff;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.seo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    max-width: 900px;
    margin: 0 auto;
}

.seo-grid a {
    color: #bbb;
    text-decoration: none;
    padding: 5px;
    transition: color 0.2s;
    font-size: 0.95rem;
}

.seo-grid a:hover {
    color: #fff;
    text-decoration: underline;
}

.copyright {
    color: #777;
    font-size: 0.85rem;
}

@media (min-width: 768px) {
    .results-grid { grid-template-columns: repeat(3, 1fr); }
    .ad-sidebar { display: block; padding-top: 20px; }
    
    .seo-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}