/* ============ RESET Y BASE ============ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --azul-marino: #1a2b4a;
    --azul-claro: #3b6ea5;
    --azul-acento: #4a90d9;
    --gris-claro: #f5f7fa;
    --gris-medio: #8896a8;
    --blanco: #ffffff;
    --sombra: 0 4px 20px rgba(26, 43, 74, 0.08);
}

body {
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    color: var(--azul-marino);
    line-height: 1.6;
    background: var(--blanco);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.hidden {
    display: none !important;
}

/* ============ BOTONES ============ */
.btn-primary {
    display: inline-block;
    background: var(--azul-acento);
    color: var(--blanco);
    padding: 16px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(74, 144, 217, 0.3);
}

.btn-primary:hover {
    background: var(--azul-claro);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 217, 0.4);
}

.btn-full {
    width: 100%;
    text-align: center;
}

.btn-secondary {
    display: block;
    width: 100%;
    background: transparent;
    color: var(--azul-marino);
    padding: 14px;
    border: 2px solid #d0d8e0;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 12px;
    transition: all 0.3s ease;
}

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

/* ============ HERO ============ */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8eef5 100%);
    padding-bottom: 80px;
    min-height: 90vh;
    display: flex;
    flex-direction: column;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 40px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 3px;
    color: var(--azul-marino);
}

.nav-cta {
    color: var(--azul-marino);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
}

.hero-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 40px 24px;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    line-height: 1.15;
    margin-bottom: 24px;
    font-weight: 800;
    color: var(--azul-marino);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: #5a6b80;
    margin-bottom: 36px;
    max-width: 650px;
}

.hero-subtitle strong {
    color: var(--azul-marino);
}

.hero-trust {
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--gris-medio);
}

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

h2 {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 16px;
    color: var(--azul-marino);
    font-weight: 800;
}

.section-subtitle {
    text-align: center;
    color: var(--gris-medio);
    font-size: 1.1rem;
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ============ PROBLEMA ============ */
.problema {
    background: var(--blanco);
}

.problema-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.problema-card {
    background: var(--gris-claro);
    padding: 32px;
    border-radius: 16px;
    text-align: center;
}

.problema-card .icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.problema-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--azul-marino);
}

.problema-card p {
    color: var(--gris-medio);
    font-size: 0.95rem;
}

/* ============ CALCULADORA ============ */
.calculadora {
    background: var(--gris-claro);
}

.form-calculadora {
    max-width: 600px;
    margin: 0 auto;
    background: var(--blanco);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--sombra);
}

.form-step {
    margin-bottom: 28px;
}

.form-step label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--azul-marino);
}

.form-step small {
    display: block;
    color: var(--gris-medio);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.form-step input[type="number"] {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e0e6ed;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-step input[type="number"]:focus {
    outline: none;
    border-color: var(--azul-acento);
}

.opciones-postura,
.opciones-colchon {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.radio-card {
    cursor: pointer;
    position: relative;
}

.radio-card input {
    position: absolute;
    opacity: 0;
}

.radio-card span {
    display: block;
    padding: 14px 8px;
    text-align: center;
    border: 2px solid #e0e6ed;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.radio-card input:checked + span {
    border-color: var(--azul-acento);
    background: rgba(74, 144, 217, 0.08);
    color: var(--azul-acento);
    font-weight: 700;
}

/* ============ RESULTADO ============ */
.resultado {
    max-width: 600px;
    margin: 32px auto 0;
    background: var(--blanco);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--sombra);
    text-align: center;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.resultado h3 {
    font-size: 1.6rem;
    margin-bottom: 24px;
    color: var(--azul-marino);
}

.resultado-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.resultado-item {
    background: var(--gris-claro);
    padding: 24px 16px;
    border-radius: 14px;
}

.resultado-label {
    display: block;
    font-size: 0.85rem;
    color: var(--gris-medio);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.resultado-valor {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--azul-acento);
}

.resultado-msg {
    color: var(--gris-medio);
    font-size: 0.95rem;
    margin-bottom: 24px;
    line-height: 1.6;
}

/* ============ BENEFICIOS ============ */
.beneficios {
    background: var(--blanco);
}

.beneficios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 28px;
    margin-top: 48px;
}

.beneficio-card {
    padding: 28px;
    border: 2px solid #eef2f6;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.beneficio-card:hover {
    border-color: var(--azul-acento);
    transform: translateY(-4px);
}

.beneficio-card .icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.beneficio-card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--azul-marino);
}

.beneficio-card p {
    color: var(--gris-medio);
    font-size: 0.9rem;
}

/* ============ TESTIMONIOS ============ */
.testimonios {
    background: var(--gris-claro);
}

.testimonios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
    margin-top: 48px;
}

.testimonio-card {
    background: var(--blanco);
    padding: 32px;
    border-radius: 16px;
    box-shadow: var(--sombra);
}

.testimonio-texto {
    font-size: 1rem;
    font-style: italic;
    color: var(--azul-marino);
    margin-bottom: 16px;
    line-height: 1.7;
}

.testimonio-autor {
    font-size: 0.85rem;
    color: var(--gris-medio);
    font-weight: 600;
}

/* ============ GARANTÍA ============ */
.garantia {
    background: var(--azul-marino);
    color: var(--blanco);
    text-align: center;
}

.garantia h2 {
    color: var(--blanco);
}

.garantia-texto {
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto 36px;
    opacity: 0.9;
}

.garantia .btn-primary {
    background: var(--blanco);
    color: var(--azul-marino);
    box-shadow: none;
}

.garantia .btn-primary:hover {
    background: var(--gris-claro);
}

/* ============ FOOTER ============ */
.footer {
    background: #0f1a2e;
    color: var(--blanco);
    padding: 48px 0;
    text-align: center;
}

.footer-logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 3px;
    margin-bottom: 8px;
}

.footer-tagline {
    color: var(--gris-medio);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.footer-copy {
    font-size: 0.85rem;
    opacity: 0.5;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    .opciones-postura,
    .opciones-colchon {
        grid-template-columns: 1fr;
    }
    
    .resultado-grid {
        grid-template-columns: 1fr;
    }
    
    .form-calculadora,
    .resultado {
        padding: 24px;
    }
    
    .nav {
        padding: 16px 20px;
    }
}
/* ============ VIDEO DE MEDICIÓN (Vertical 9:16) ============ */
.video-medicion {
    background: white;
    text-align: center;
    padding: 80px 0;
}

.video-medicion h2 {
    color: #1a2b4a;
    font-size: 2rem;
    margin-bottom: 16px;
}

.video-medicion .section-subtitle {
    color: #8896a8;
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 40px;
}

.video-wrapper {
    max-width: 380px;
    margin: 0 auto;
    position: relative;
    padding-bottom: 177.78%; /* 9:16 vertical */
    height: 0;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(26, 43, 74, 0.15);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

@media (max-width: 768px) {
    .video-medicion h2 {
        font-size: 1.5rem;
    }
    .video-wrapper {
        max-width: 320px;
        border-radius: 12px;
    }
}