:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-bg: #f3f4f6;
    --color-text: #111827;
    --color-muted: #6b7280;
    --color-card-bg: #ffffff;
    --radius: 12px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.site-header {
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
}

.brand-name {
    font-weight: 700;
    font-size: 1.1rem;
}

.brand-tagline {
    display: block;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.main-nav a {
    margin-left: 1rem;
    font-size: 0.95rem;
    color: var(--color-muted);
}

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

.hero {
    padding: 3rem 0 2.5rem;
}

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr);
    gap: 2.5rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

.hero-text p {
    font-size: 1.05rem;
    color: var(--color-muted);
    max-width: 32rem;
}

.hero-side .hero-card {
    background: var(--color-card-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
}

.hero-card h2 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.hero-card ul {
    padding-left: 1.1rem;
    margin: 0;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.section {
    padding: 2.5rem 0;
}

.section-alt {
    padding: 2.5rem 0;
    background: #e5e7eb;
}

.section h2 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--color-card-bg);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.06);
}

.card h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.card p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-muted);
}

.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.5fr);
    gap: 1.5rem;
}

.btn {
    display: inline-block;
    border-radius: 999px;
    padding: 0.65rem 1.6rem;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
}

.site-footer {
    background: #111827;
    color: #e5e7eb;
    padding: 2rem 0 1.5rem;
    margin-top: 2rem;
    font-size: 0.9rem;
}

.footer-inner {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.site-footer a {
    color: #93c5fd;
}

.footer-copy {
    grid-column: 1 / -1;
    text-align: center;
    margin-top: 1rem;
    color: #9ca3af;
    font-size: 0.8rem;
}

@media (max-width: 768px) {
    .hero-inner,
    .grid-3,
    .contact-grid,
    .footer-inner {
        grid-template-columns: 1fr;
    }

    .main-nav {
        display: none; /* Más adelante podemos hacer menú móvil */
    }

    .hero {
        padding-top: 2rem;
    }
}