:root {
    --color-primary: #1a1a1a;
    --color-secondary: #4a4a4a;
    --color-accent: #0066cc;
    --color-background: #ffffff;
    --spacing-unit: 1rem;
    --font-primary: system-ui, -apple-system, sans-serif;
    --max-width: 1200px;
    --border-radius: 4px;
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-primary);
    background: var(--color-background);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Typography */
h1, h2, h3 {
    line-height: 1.2;
    margin-bottom: var(--spacing-unit);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--color-secondary);
}

h3 {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
}

/* Layout */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-unit);
}

section {
    margin: calc(var(--spacing-unit) * 4) 0;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), var(--color-background);
    color: white;
    padding: calc(var(--spacing-unit) * 4) var(--spacing-unit);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.subheadline {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    margin-bottom: var(--spacing-unit);
}

/* CTA Button */
.cta-button {
    display: inline-block;
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    background: var(--color-accent);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: bold;
    transition: background-color 0.3s;
}

.cta-button:hover,
.cta-button:focus {
    background-color: #0052a3;
}

/* Benefits Section */
.benefits-list {
    list-style: none;
    padding: 0;
}

.benefits-list li {
    padding: calc(var(--spacing-unit) * 0.5) 0;
    padding-left: calc(var(--spacing-unit) * 1.5);
    position: relative;
}

.benefits-list li::before {
    content: "✓";
    color: var(--color-accent);
    position: absolute;
    left: 0;
}

.learn-more,
.feature-links,
.comparison-links {
    margin-top: var(--spacing-unit);
}

.learn-more a,
.feature-links a,
.comparison-links a {
    color: var(--color-accent);
    text-decoration: none;
    display: inline-block;
    margin: calc(var(--spacing-unit) * 0.5) 0;
}

.learn-more a:hover,
.feature-links a:hover,
.comparison-links a:hover {
    text-decoration: underline;
}

.feature-links,
.comparison-links {
    text-align: center;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-unit);
}

.feature {
    padding: var(--spacing-unit);
    background: #f5f5f5;
    border-radius: var(--border-radius);
}

/* Comparison Table */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-unit) 0;
}

.comparison-table th,
.comparison-table td {
    padding: calc(var(--spacing-unit) * 0.75);
    border: 1px solid #ddd;
    text-align: left;
}

.comparison-table th {
    background: #f5f5f5;
}

/* Stats Grid */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-unit);
    text-align: center;
}

.stat strong {
    display: block;
    font-size: 2.5rem;
    color: var(--color-accent);
}

/* Mount Finder Form */
.finder-form {
    display: grid;
    gap: var(--spacing-unit);
    max-width: 600px;
    margin: 0 auto;
}

select {
    padding: calc(var(--spacing-unit) * 0.5);
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

/* Trust Grid */
.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-unit);
}

.trust-item {
    padding: var(--spacing-unit);
    background: #f5f5f5;
    border-radius: var(--border-radius);
}

/* Footer */
footer {
    text-align: center;
    padding: calc(var(--spacing-unit) * 2);
    background: #f5f5f5;
    margin-top: calc(var(--spacing-unit) * 4);
}

/* Responsive Design */
@media (max-width: 768px) {
    .comparison-table {
        display: block;
        overflow-x: auto;
    }
    
    .hero {
        padding: calc(var(--spacing-unit) * 2) var(--spacing-unit);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}