/* ============================================================
   layout.css — container, sections, grid primitives
   Navbar y footer se agregan en Fase 2.
   ============================================================ */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
}

.section {
    padding-block: var(--section-padding);
}

.section-lg {
    padding-block: var(--section-padding-lg);
}

/* Fondos de sección reutilizables */
.section--light {
    background: var(--color-gray-100);
}

.section--dark {
    background: var(--color-secondary);
    color: var(--color-white);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
    color: var(--color-white);
}

.section--brand {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
}

.section--brand h1,
.section--brand h2,
.section--brand h3 {
    color: var(--color-white);
}

/* ============================================================
   Site header (navbar)
   v1: solo logo. v2 agregará nav + CTA.
   ============================================================ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    padding-block: 12px;
}

.site-header__logo {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.site-header__logo img {
    height: 32px;
    width: auto;
}

.site-header__logo:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

/* ============================================================
   Site footer
   ============================================================ */

.site-footer {
    background: var(--color-secondary);
    color: var(--color-gray-200);
    margin-top: auto;
}

.site-footer__inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    padding-block: 56px;
}

.site-footer__brand {
    max-width: 380px;
}

.site-footer__logo {
    height: 64px;
    width: auto;
    margin-bottom: 16px;
}

.site-footer__tagline {
    color: var(--color-gray-200);
    font-size: var(--fs-small);
    line-height: var(--lh-base);
}

.site-footer__label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-gray-400);
    margin-bottom: 12px;
    font-weight: 600;
}

.site-footer__email {
    color: var(--color-white);
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.site-footer__email:hover {
    color: var(--color-primary);
}

.site-footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-block: 20px;
}

.site-footer__bottom small {
    color: var(--color-gray-400);
    font-size: var(--fs-small);
}

/* Social icons */
.social-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 12px;
}

.social-list a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-gray-200);
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.social-list a:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}