/* ========================================
   Know How S.A. — Estilos del sitio
   ======================================== */

:root {
    --color-primary: #0a2540;
    --color-primary-light: #1e4976;
    --color-accent: #00d4ff;
    --color-accent-dark: #0099cc;
    --color-text: #1a1a1a;
    --color-text-soft: #525f7f;
    --color-text-mute: #8898aa;
    --color-bg: #ffffff;
    --color-bg-soft: #fafbfc;
    --color-border: #e6ebf1;
    --max-width: 1100px;
    --radius: 10px;
    --shadow-sm: 0 1px 3px rgba(10, 37, 64, 0.08);
    --shadow-md: 0 4px 16px rgba(10, 37, 64, 0.10);
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-primary-light); text-decoration: none; }
a:hover { color: var(--color-accent-dark); }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== HEADER ===== */
.site-header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    padding-bottom: 16px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primary);
}

.logo span { color: var(--color-accent-dark); }

.nav ul {
    display: flex;
    gap: 28px;
    list-style: none;
}

.nav a {
    color: var(--color-text-soft);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

.nav a.cta {
    background: var(--color-primary);
    color: white;
    padding: 8px 16px;
    border-radius: var(--radius);
}

.nav a.cta:hover {
    background: var(--color-primary-light);
    color: white;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-primary);
}

/* ===== HERO ===== */
.hero {
    padding: 100px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-soft) 100%);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 20px;
    line-height: 1.15;
}

.hero .tagline {
    font-size: 1.3rem;
    color: var(--color-text-soft);
    max-width: 700px;
    margin: 0 auto 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-light);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: white;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-whatsapp {
    background: #25D366;
    color: white;
}

.btn-whatsapp:hover {
    background: #1eb053;
    color: white;
}

/* ===== SECTIONS ===== */
section {
    padding: 80px 0;
}

section.alt {
    background: var(--color-bg-soft);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.2rem;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--color-text-soft);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== PRODUCTOS GRID ===== */
.productos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.producto {
    background: white;
    padding: 32px 28px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    transition: all 0.2s;
    text-align: left;
}

.producto:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.producto .icono {
    font-size: 2rem;
    margin-bottom: 16px;
}

.producto h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.producto p {
    color: var(--color-text-soft);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.producto a {
    color: var(--color-accent-dark);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ===== PROOF / NÚMEROS ===== */
.proof {
    background: var(--color-primary);
    color: white;
}

.proof .section-header h2,
.proof .section-header p { color: white; }

.proof .section-header p { opacity: 0.85; }

.numeros {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 32px;
    text-align: center;
}

.numero {
    padding: 20px;
}

.numero .valor {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 8px;
}

.numero .label {
    font-size: 0.95rem;
    opacity: 0.85;
}

/* ===== PÁGINA DE PRODUCTO ===== */
.page-header {
    padding: 80px 0 40px;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 100%);
}

.page-header .breadcrumb {
    font-size: 0.9rem;
    color: var(--color-text-mute);
    margin-bottom: 12px;
}

.page-header h1 {
    font-size: 2.6rem;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.page-header .lead {
    font-size: 1.2rem;
    color: var(--color-text-soft);
    max-width: 700px;
    margin: 0 auto;
}

.content {
    padding: 60px 0;
}

.content .container {
    max-width: 800px;
}

.content h2 {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin: 40px 0 16px;
}

.content h3 {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin: 32px 0 12px;
}

.content p {
    color: var(--color-text);
    margin-bottom: 16px;
}

.content ul, .content ol {
    margin: 16px 0 16px 24px;
    color: var(--color-text);
}

.content li { margin-bottom: 8px; }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin: 32px 0;
}

.feature {
    background: var(--color-bg-soft);
    padding: 24px;
    border-radius: var(--radius);
    border-left: 3px solid var(--color-accent-dark);
}

.feature h4 {
    color: var(--color-primary);
    margin-bottom: 8px;
    font-size: 1.05rem;
}

.feature p {
    color: var(--color-text-soft);
    font-size: 0.92rem;
    margin: 0;
}

/* ===== FORMULARIO ===== */
.form {
    max-width: 560px;
    margin: 40px auto 0;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-primary);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    background: white;
    color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(10, 37, 64, 0.1);
}

.form-group textarea { min-height: 120px; resize: vertical; }

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.contact-card {
    background: var(--color-bg-soft);
    padding: 24px;
    border-radius: var(--radius);
    text-align: center;
}

.contact-card .icono { font-size: 1.8rem; margin-bottom: 12px; }

.contact-card h3 {
    color: var(--color-primary);
    font-size: 1.05rem;
    margin-bottom: 8px;
}

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

/* ===== FOOTER ===== */
.site-footer {
    background: var(--color-primary);
    color: white;
    padding: 60px 0 30px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: white;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.92rem;
    line-height: 1.6;
}

.footer-col h4 {
    color: white;
    font-size: 0.95rem;
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-col ul { list-style: none; }

.footer-col li { margin-bottom: 8px; }

.footer-col a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.92rem;
    transition: color 0.2s;
}

.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

/* ===== TABLA COMPARATIVA ===== */
.comparativa {
    overflow-x: auto;
    margin: 32px 0;
}

.comparativa table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.comparativa th {
    background: var(--color-primary);
    color: white;
    padding: 16px 20px;
    text-align: left;
    font-size: 0.95rem;
    font-weight: 600;
}

.comparativa th.competitor {
    background: #8a1a1a;
}

.comparativa th.us {
    background: #0d6e2e;
}

.comparativa td {
    padding: 16px 20px;
    border-top: 1px solid var(--color-border);
    font-size: 0.95rem;
    color: var(--color-text);
}

.comparativa td.bad {
    color: #8a1a1a;
}

.comparativa td.good {
    color: #0d6e2e;
    font-weight: 500;
}

.comparativa tr:nth-child(even) td {
    background: var(--color-bg-soft);
}

/* ===== MÓDULOS GRID ===== */
.modulos-pilares {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.pilar {
    background: white;
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-accent-dark);
}

.pilar h4 {
    color: var(--color-primary);
    font-size: 1.05rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pilar ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.pilar li {
    padding: 6px 0;
    color: var(--color-text-soft);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--color-bg-soft);
}

.pilar li:last-child {
    border-bottom: none;
}

.pilar li::before {
    content: "▸";
    color: var(--color-accent-dark);
    margin-right: 8px;
}

/* ===== CASOS REALES ===== */
.casos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin: 32px 0;
}

.caso {
    background: white;
    padding: 28px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-accent-dark);
}

.caso .caso-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.caso .caso-logo {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.caso h3 {
    color: var(--color-primary);
    font-size: 1.15rem;
    margin: 0;
}

.caso .subtitle {
    color: var(--color-text-mute);
    font-size: 0.85rem;
}

.caso p {
    color: var(--color-text-soft);
    font-size: 0.92rem;
    margin-bottom: 0;
}

.caso .stat {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ===== SEGURIDAD ===== */
.seguridad-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin: 32px 0;
}

.seg-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.seg-item .check {
    color: #0d6e2e;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.seg-item .seg-text {
    flex: 1;
}

.seg-item h4 {
    color: var(--color-primary);
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.seg-item p {
    color: var(--color-text-soft);
    font-size: 0.85rem;
    margin: 0;
    line-height: 1.5;
}

/* ===== WHATSAPP FLOAT ===== */
.wa-float {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.8rem;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
    z-index: 1000;
    transition: transform 0.2s;
    text-decoration: none;
}

.wa-float:hover {
    transform: scale(1.08);
    color: white;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    .hero .tagline { font-size: 1.1rem; }
    .page-header h1 { font-size: 2rem; }
    .section-header h2 { font-size: 1.7rem; }

    .nav-toggle { display: block; }

    .nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }

    .nav.open ul { display: flex; }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    section { padding: 60px 0; }
    .hero { padding: 60px 0 50px; }
}