/* ── Variables de tema ───────────────────────────────────────────────────── */
/* Editar estas variables para adaptar colores y tipografía a cada cliente.  */
:root {
    --color-primary:    #2563eb;
    --color-primary-dk: #1d4ed8;
    --color-accent:     #f59e0b;
    --color-text:       #1e293b;
    --color-text-muted: #64748b;
    --color-bg:         #ffffff;
    --color-bg-alt:     #f8fafc;
    --color-border:     #e2e8f0;

    --font-base: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-size-base: 1rem;
    --line-height: 1.65;

    --radius: 0.5rem;
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 10px 30px rgba(0,0,0,.1);

    --container-width: 1100px;
    --section-gap: 5rem;
    --header-height: 64px;
}

/* ── Reset mínimo ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background: var(--color-bg);
}

img { display: block; max-width: 100%; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font: inherit; border: none; background: none; }

/* ── Utilidades ──────────────────────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin-inline: auto;
    padding-inline: 1.25rem;
}

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

.section-title {
    font-size: clamp(1.6rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -.02em;
    text-align: center;
}

.section-subtitle {
    margin-top: .5rem;
    text-align: center;
    color: var(--color-text-muted);
    max-width: 560px;
    margin-inline: auto;
}

.btn {
    display: inline-block;
    padding: .75rem 1.75rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: .95rem;
    transition: background .2s, transform .15s, box-shadow .2s;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(37,99,235,.35);
}

.btn-primary:hover,
.btn-primary:focus-visible {
    background: var(--color-primary-dk);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(37,99,235,.4);
}

/* ── Header ──────────────────────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary);
    white-space: nowrap;
}

.main-nav ul {
    display: flex;
    gap: 2rem;
}

.main-nav a {
    font-size: .9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color .2s;
}

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

/* Botón hamburguesa */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform .25s, opacity .25s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ────────────────────────────────────────────────────────────────── */
.hero {
    padding-block: 5rem 4rem;
    background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 60%, #fff 100%);
    border-bottom: 1px solid var(--color-border);
}

.hero-inner {
    max-width: 720px;
    text-align: center;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    letter-spacing: -.03em;
    line-height: 1.2;
    color: var(--color-text);
}

.hero p {
    margin-top: 1.25rem;
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 560px;
    margin-inline: auto;
}

.hero .btn { margin-top: 2rem; }

/* ── Servicios ───────────────────────────────────────────────────────────── */
.services { background: var(--color-bg); }

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem 1.75rem;
    transition: box-shadow .2s, transform .2s;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.card-icon {
    font-size: 1.75rem;
    color: var(--color-primary);
    display: block;
    margin-bottom: 1rem;
}

.card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: .5rem;
}

.card p {
    font-size: .9rem;
    color: var(--color-text-muted);
}

/* ── Beneficios ──────────────────────────────────────────────────────────── */
.benefits { background: var(--color-bg-alt); }

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.benefit-item {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.benefit-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    opacity: .25;
    line-height: 1;
    flex-shrink: 0;
}

.benefit-item h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: .35rem;
}

.benefit-item p {
    font-size: .9rem;
    color: var(--color-text-muted);
}

/* ── Contacto ────────────────────────────────────────────────────────────── */
.contact { background: var(--color-bg); }

.contact-inner {
    max-width: 680px;
    text-align: center;
}

.contact-inner h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
}

.contact-inner > p {
    margin-top: .5rem;
    color: var(--color-text-muted);
}

.contact-form {
    margin-top: 2.5rem;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: .4rem;
}

.form-group label {
    font-size: .875rem;
    font-weight: 600;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: .65rem .9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font: inherit;
    font-size: .95rem;
    color: var(--color-text);
    background: var(--color-bg-alt);
    transition: border-color .2s, box-shadow .2s;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

.form-group input.invalid,
.form-group textarea.invalid {
    border-color: #ef4444;
}

.contact-form .btn { align-self: flex-start; }

.form-feedback {
    font-size: .875rem;
    min-height: 1.2em;
    color: var(--color-text-muted);
}

.form-feedback.success { color: #16a34a; }
.form-feedback.error   { color: #dc2626; }

/* ── Footer ──────────────────────────────────────────────────────────────── */
.site-footer {
    background: var(--color-text);
    color: #94a3b8;
    padding-block: 2.5rem;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-align: center;
}

.footer-brand {
    font-size: 1.05rem;
    font-weight: 700;
    color: #f1f5f9;
}

.footer-nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .5rem 1.5rem;
}

.footer-nav a {
    font-size: .85rem;
    color: #94a3b8;
    transition: color .2s;
}

.footer-nav a:hover { color: #f1f5f9; }

.footer-copy {
    font-size: .8rem;
    color: #64748b;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    :root { --section-gap: 3.5rem; }

    .nav-toggle { display: flex; }

    .main-nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: 1.25rem;
        box-shadow: var(--shadow);
    }

    .main-nav.is-open { display: block; }

    .main-nav ul {
        flex-direction: column;
        gap: 1rem;
    }

    .main-nav a { font-size: 1rem; }

    .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero { padding-block: 3.5rem 3rem; }
}