/* Variables de Diseño Sólido */
:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text-main: #0f172a;
    --color-text-muted: #475569;
    --color-primary: #1e3a8a;
    --color-border: #e2e8f0;
    --font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    font-family: var(--font-stack);
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.site-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 1px;
    color: var(--color-primary);
}

.main-nav a {
    text-decoration: none;
    color: var(--color-text-muted);
    margin-left: 2rem;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.main-nav a:hover {
    color: var(--color-text-main);
}

.main-nav .btn-nav {
    background-color: var(--color-text-main);
    color: var(--color-surface);
    padding: 0.5rem 1rem;
}

.main-nav .btn-nav:hover {
    background-color: var(--color-primary);
    color: var(--color-surface);
}

/* Hero Section */
.hero {
    padding: 8rem 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.hero-text {
    max-width: 650px;
}

.hero h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: 2.5rem;
}

.btn-primary {
    display: inline-block;
    background-color: var(--color-primary);
    color: var(--color-surface);
    text-decoration: none;
    padding: 0.75rem 2rem;
    font-weight: 600;
    font-size: 1rem;
    transition: background-color 0.2s ease;
}

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

/* Features */
.features {
    padding: 6rem 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--color-surface);
    padding: 2.5rem;
    border: 1px solid var(--color-border);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Footer */
.site-footer {
    background-color: var(--color-text-main);
    color: var(--color-surface);
    padding: 3rem 0;
    font-size: 0.9rem;
}

.footer-flex {
    display: flex;
    justify-content: space-between;
}

.site-footer p {
    opacity: 0.7;
}