/* =========================================
   BATCONTROL — Estilos modernos
   Paleta: negro / gris oscuro / naranja (#FF6600)
   ========================================= */

:root {
    --primary: #000000;
    --primary-light: #1a1a1a;
    --secondary: #333333;
    --accent: #FF6600;
    --accent-light: #FF8533;
    --accent-dark: #e05a00;
    --dark: #000000;
    --light: #f8f9fa;
    --gray: #6c757d;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 20px 45px rgba(0, 0, 0, 0.14);
    --shadow-accent: 0 10px 25px rgba(255, 102, 0, 0.35);
    --radius: 22px;
    --nav-h: 78px;
    --font: 'Space Grotesk', sans-serif;
    --transition: all 0.35s cubic-bezier(0.25, 0.8, 0.35, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-h);
}

body {
    font-family: var(--font);
    line-height: 1.7;
    color: var(--dark);
    background: var(--white);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Skip link accesibilidad */
.skip-link {
    position: absolute;
    top: -100px;
    left: 20px;
    background: var(--accent);
    color: var(--dark);
    padding: 10px 18px;
    border-radius: 8px;
    z-index: 2000;
    font-weight: 600;
}

.skip-link:focus {
    top: 15px;
}

/* ========== Botones ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 34px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-sm {
    padding: 10px 22px;
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--accent);
    color: #000;
    box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(255, 102, 0, 0.45);
}

.btn-ghost {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.35);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-4px);
}

.btn-whatsapp {
    background: #25d366;
    color: #fff;
    box-shadow: 0 10px 25px rgba(37, 211, 102, 0.35);
}

.btn-whatsapp:hover {
    background: #1eb855;
    transform: translateY(-4px);
}

/* ========== Navbar ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.92);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: var(--nav-h);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    height: 86px;
    width: auto;
    object-fit: contain;
    transition: var(--transition);
}

.navbar.scrolled .logo-img {
    height: 70px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-menu a {
    color: var(--white);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 40px;
    position: relative;
    transition: var(--transition);
}

.nav-menu a:not(.btn):hover {
    color: var(--accent);
    background: rgba(255, 102, 0, 0.1);
}

.nav-menu a.active {
    color: var(--accent);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
    padding: 10px;
    z-index: 1100;
}

.hamburger span {
    width: 26px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav-cta-mobile {
    display: none;
}

/* ========== Hero ========== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: calc(var(--nav-h) + 40px) 0 60px;
    position: relative;
    background-color: var(--primary);
    color: var(--white);
    overflow: hidden;
}

/* Slide de imagen de fondo con overlay translúcido para legibilidad */
.hero-slides {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.hero-slide::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgba(0, 0, 0, 0.72) 0%, rgba(13, 13, 13, 0.78) 40%, rgba(0, 0, 0, 0.82) 100%);
}

.hero-slide.active {
    opacity: 1;
}

@media (max-width: 768px) {
    .hero-slide {
        background-attachment: scroll !important;
    }
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.5;
    animation: float 12s ease-in-out infinite;
}

.orb-1 {
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, rgba(255, 102, 0, 0.55), transparent 70%);
    top: -120px;
    right: -120px;
}

.orb-2 {
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(255, 133, 51, 0.4), transparent 70%);
    bottom: -100px;
    left: -80px;
    animation-delay: -4s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.12), transparent 70%);
    top: 40%;
    left: 45%;
    animation-delay: -8s;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 9px 20px;
    border-radius: 50px;
    background: rgba(255, 102, 0, 0.12);
    border: 1px solid rgba(255, 102, 0, 0.3);
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 28px;
    animation: fadeInUp 0.8s ease both;
}

.hero h1 {
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 22px;
    animation: fadeInUp 0.8s 0.15s ease both;
}

.gradient-text {
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.hero-content p {
    font-size: clamp(1.05rem, 2.2vw, 1.3rem);
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 38px;
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s 0.3s ease both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s 0.45s ease both;
}

.hero-stats {
    position: relative;
    z-index: 2;
    margin-top: 64px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    animation: fadeInUp 0.8s 0.6s ease both;
}

.stat {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 26px 20px;
    text-align: center;
    backdrop-filter: blur(8px);
    transition: var(--transition);
}

.stat:hover {
    border-color: rgba(255, 102, 0, 0.5);
    transform: translateY(-6px);
}

.stat-num {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}

.stat-suffix {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent);
}

.stat-label {
    display: block;
    margin-top: 10px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
}

/* Scroll hint */
.scroll-hint {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    width: 30px;
    height: 48px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-radius: 30px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-hint span {
    width: 5px;
    height: 10px;
    background: var(--accent);
    border-radius: 5px;
    animation: scrollDot 1.8s infinite;
}

/* ========== Section head ========== */
.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 50px;
    background: rgba(255, 102, 0, 0.12);
    color: var(--accent);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-tag-light {
    background: rgba(255, 102, 0, 0.2);
    color: var(--accent-light);
}

.section-title {
    font-size: clamp(2rem, 4.5vw, 2.8rem);
    font-weight: 800;
    color: var(--dark);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-sub {
    color: var(--gray);
    font-size: 1.05rem;
}

/* ========== About ========== */
.about {
    padding: 110px 0;
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}

.about-card {
    background: var(--light);
    padding: 44px;
    border-radius: var(--radius);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: transparent;
}

.about-icon {
    width: 76px;
    height: 76px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 26px;
    transition: var(--transition);
}

.about-card:hover .about-icon {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
}

.about-icon i {
    font-size: 2.2rem;
    color: var(--white);
}

.about-card h3 {
    font-size: 1.7rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--dark);
}

.about-card p {
    color: var(--gray);
    line-height: 1.8;
}

.about-highlight {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    padding: 40px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 30px;
    box-shadow: var(--shadow-accent);
}

.about-highlight i {
    font-size: 3rem;
    color: #000;
    flex-shrink: 0;
}

.about-highlight p {
    color: #000;
    font-size: 1.1rem;
    line-height: 1.8;
    font-weight: 500;
}

/* ========== Services ========== */
.services {
    padding: 110px 0;
    background: var(--light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

/* Flip-card de servicio: se voltea al hacer hover para mostrar la foto */
.service-card {
    position: relative;
    height: 300px;
    perspective: 1400px;
    box-shadow: var(--shadow);
    border-radius: var(--radius);
}

.flip-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 0.7s cubic-bezier(0.25, 0.8, 0.35, 1);
    border-radius: var(--radius);
}

.service-card:hover .flip-inner {
    transform: rotateY(180deg);
}

.flip-front,
.flip-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius);
    overflow: hidden;
}

.flip-front {
    background: var(--white);
    padding: 30px;
    display: flex;
    flex-direction: column;
}

.service-num {
    position: absolute;
    top: 18px;
    right: 22px;
    font-size: 2.8rem;
    font-weight: 800;
    color: rgba(0, 0, 0, 0.05);
    line-height: 1;
    transition: var(--transition);
}

.service-card:hover .service-num {
    color: rgba(255, 102, 0, 0.18);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--light);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    flex-shrink: 0;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--accent);
    transform: rotate(-6deg) scale(1.05);
}

.service-icon i {
    font-size: 1.7rem;
    color: var(--accent);
    transition: color 0.3s ease;
}

.service-card:hover .service-icon i {
    color: #000;
}

.service-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.service-card .flip-front p {
    color: var(--gray);
    font-size: 0.93rem;
    line-height: 1.6;
    margin-bottom: 8px;
}

.service-list {
    list-style: none;
    margin-top: 4px;
}

.service-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    color: var(--gray);
    font-size: 0.88rem;
    line-height: 1.55;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
}

.card-detail {
    margin-top: 8px;
    padding-top: 10px;
    border-top: 1px dashed rgba(0, 0, 0, 0.1);
    font-size: 0.85rem;
    color: var(--gray);
}

.flip-hint {
    margin-top: auto;
    padding-top: 12px;
    font-size: 0.78rem;
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 0.4px;
    text-transform: uppercase;
}

.flip-back {
    transform: rotateY(180deg);
    background: var(--dark);
}

.flip-back .back-img {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: brightness(0.85);
}

/* Overlay que cubre por completo la imagen */
.flip-back .back-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(0, 0, 0, 0.82) 0%, rgba(0, 0, 0, 0.35) 45%, rgba(0, 0, 0, 0.1) 100%);
    pointer-events: none;
}

/* Texto pequeño en la parte inferior izquierda */
.flip-back .back-caption {
    position: absolute;
    left: 24px;
    right: 24px;
    bottom: 24px;
    color: var(--white);
    font-weight: 600;
    font-size: 1.05rem;
    line-height: 1.4;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
}

/* ========== Methods ========== */
.methods {
    padding: 110px 0;
    background: linear-gradient(160deg, #000 0%, #1a1a1a 100%);
}

.methods .section-title {
    color: var(--white);
}

.methods .section-sub {
    color: rgba(255, 255, 255, 0.7);
}

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

.method-card {
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    padding: 44px 36px;
    border-radius: var(--radius);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: var(--transition);
}

.method-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-10px);
    border-color: rgba(255, 102, 0, 0.6);
}

.method-icon {
    width: 84px;
    height: 84px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 26px;
    box-shadow: var(--shadow-accent);
    transition: var(--transition);
}

.method-card:hover .method-icon {
    transform: scale(1.08);
}

.method-icon i {
    font-size: 2.4rem;
    color: #000;
}

.method-card h3 {
    font-size: 1.5rem;
    color: var(--white);
    margin-bottom: 14px;
    font-weight: 700;
}

.method-card p {
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
}

/* ========== Nuestros Clientes (carrusel continuo) ========== */
.clients {
    padding: 110px 0;
    background: var(--light);
}

.clients-marquee {
    position: relative;
    overflow: hidden;
    padding: 12px 0;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.clients-track {
    display: flex;
    width: max-content;
    animation: marquee 32s linear infinite;
    will-change: transform;
}

.clients-marquee:hover .clients-track {
    animation-play-state: paused;
}

.client-chip {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-right: 28px;
    padding: 20px 30px;
    background: var(--white);
    border-radius: 18px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: var(--shadow);
    white-space: nowrap;
    transition: var(--transition);
}

.client-chip:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(255, 102, 0, 0.4);
}

.client-chip i {
    font-size: 1.7rem;
    color: var(--accent);
}

.client-chip span {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--dark);
}

@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ========== Contact ========== */
.contact {
    padding: 110px 0;
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--light);
    padding: 22px;
    border-radius: 18px;
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow);
}

.contact-item i {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.contact-item p,
.contact-item a {
    color: var(--gray);
    display: block;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--accent);
}

.btn-whatsapp {
    margin-top: 8px;
}

.contact-form {
    background: var(--light);
    padding: 40px;
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    gap: 18px;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px 18px;
    border: 2px solid rgba(0, 0, 0, 0.06);
    border-radius: 14px;
    background: var(--white);
    font-family: inherit;
    font-size: 1rem;
    color: var(--dark);
    transition: var(--transition);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--gray);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(255, 102, 0, 0.12);
}

.contact-form textarea {
    resize: vertical;
    min-height: 130px;
}

.contact-form .btn {
    width: 100%;
}

.form-note {
    text-align: center;
    font-size: 0.85rem;
    color: var(--gray);
}

/* ========== Footer ========== */
.footer {
    background: var(--dark);
    padding: 60px 0 30px;
    border-top: 3px solid var(--accent);
}

.footer-content {
    text-align: center;
    margin-bottom: 36px;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

.footer-logo-img {
    height: 90px;
    width: auto;
    object-fit: contain;
}

.footer-text {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.footer-social a {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--accent);
    color: #000;
    transform: translateY(-5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 28px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* ========== Back to top ========== */
.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--accent);
    color: #000;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-accent);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 1200;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent-light);
    transform: translateY(-4px);
}

/* ========== Reveal animations ==========
   El contenido es visible por defecto. La animación (ocultar + aparecer)
   solo se aplica si JS añade la clase .pre-hidden, garantizando que nada
   quede invisible ante un fallo del observer. */
.reveal.pre-hidden {
    opacity: 0;
    transform: translateY(36px);
}

.reveal.pre-hidden.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

/* ========== Keyframes ========== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); }
    50% { transform: translateY(-35px) translateX(20px); }
}

@keyframes scrollDot {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(14px); }
}

/* ========== Responsive ========== */
@media (max-width: 992px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 44px;
    }

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    :root { --nav-h: 68px; }

    .nav-cta-desktop {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: min(320px, 80vw);
        height: 100vh;
        background: var(--dark);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: calc(var(--nav-h) + 30px) 26px 30px;
        gap: 8px;
        transition: right 0.4s cubic-bezier(0.25, 0.8, 0.35, 1);
        box-shadow: -20px 0 50px rgba(0, 0, 0, 0.4);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu a {
        font-size: 1.1rem;
        padding: 12px 16px;
        width: 100%;
        border-radius: 12px;
    }

    .nav-menu a.active {
        background: rgba(255, 102, 0, 0.12);
    }

    .nav-cta-mobile {
        display: block;
        margin-top: 20px;
        width: 100%;
    }

    .nav-cta-mobile a {
        width: 100%;
        text-align: center;
        display: flex;
        justify-content: center;
        border-radius: 50px;
    }

    .hero {
        padding: calc(var(--nav-h) + 50px) 0 60px;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-top: 48px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .about-grid,
    .about-highlight {
        grid-template-columns: 1fr;
    }

    .about-highlight {
        flex-direction: column;
        text-align: center;
    }

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

    .about {
        padding: 80px 0;
    }
}

@media (max-width: 480px) {
    .contact-form {
        padding: 28px 20px;
    }

    .about-card {
        padding: 32px 24px;
    }

    .section-head {
        margin-bottom: 44px;
    }
}

/* ========== Panel de Administración ========== */
.admin-toggle {
    position: fixed;
    bottom: 28px;
    left: 28px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--accent);
    color: #000;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-accent);
    z-index: 1400;
    transition: var(--transition);
}

.admin-toggle:hover {
    background: var(--accent-light);
    transform: rotate(45deg);
}

.admin-panel {
    position: fixed;
    inset: 0;
    z-index: 2000;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.admin-panel.open {
    visibility: visible;
    opacity: 1;
}

.admin-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
}

.admin-drawer {
    position: absolute;
    top: 0;
    right: 0;
    width: min(460px, 100vw);
    height: 100%;
    background: var(--white);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.25, 0.8, 0.35, 1);
}

.admin-panel.open .admin-drawer {
    transform: translateX(0);
}

.admin-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    background: var(--dark);
    color: var(--white);
}

.admin-head h2 {
    font-size: 1.15rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-head h2 i {
    color: var(--accent);
}

.admin-close {
    background: rgba(255, 255, 255, 0.12);
    color: var(--white);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.admin-close:hover {
    background: var(--accent);
    color: #000;
}

.admin-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
    background: var(--light);
}

.admin-loading {
    color: var(--gray);
}

.admin-group {
    margin-bottom: 26px;
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 16px;
    overflow: hidden;
}

.admin-group-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: var(--white);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    cursor: pointer;
    user-select: none;
}

.admin-group-head h3 {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--dark);
    flex: 1;
}

.admin-group-head i {
    color: var(--accent);
}

.admin-group-head .chev {
    transition: transform 0.3s ease;
    color: var(--gray);
}

.admin-group.collapsed .chev {
    transform: rotate(-90deg);
}

.admin-group-body {
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.admin-group.collapsed .admin-group-body {
    display: none;
}

.admin-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.admin-field label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--gray);
}

.admin-field input[type="text"],
.admin-field input[type="email"],
.admin-field input[type="tel"],
.admin-field input[type="date"],
.admin-field textarea,
.admin-field select {
    padding: 11px 14px;
    border: 2px solid rgba(0, 0, 0, 0.08);
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.92rem;
    background: var(--white);
    transition: var(--transition);
}

.admin-field input:focus,
.admin-field textarea:focus,
.admin-field select:focus {
    outline: none;
    border-color: var(--accent);
}

.admin-field textarea {
    resize: vertical;
    min-height: 70px;
}

.admin-image {
    border: 2px dashed rgba(0, 0, 0, 0.15);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--light);
}

.admin-image .img-preview {
    width: 100%;
    height: 110px;
    background-size: cover;
    background-position: center;
    border-radius: 8px;
    background-color: #ddd;
}

.admin-image .img-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.admin-image input[type="file"] {
    font-size: 0.82rem;
}

.admin-image .img-remove {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
    border: none;
    border-radius: 8px;
    padding: 7px 12px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 600;
    white-space: nowrap;
}

.admin-service-item {
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px;
    padding: 12px;
    background: var(--white);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.admin-service-item .s-title {
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.admin-service-item .s-title i {
    color: var(--accent);
}

.admin-slide-item {
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px;
    padding: 12px;
    background: var(--white);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.admin-add-btn {
    background: rgba(255, 102, 0, 0.1);
    color: var(--accent);
    border: none;
    border-radius: 10px;
    padding: 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.88rem;
    width: 100%;
    transition: var(--transition);
}

.admin-add-btn:hover {
    background: rgba(255, 102, 0, 0.18);
}

.admin-foot {
    padding: 16px 24px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    background: var(--white);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-ghost-dark {
    background: var(--light);
    color: var(--dark);
    border: 2px solid rgba(0, 0, 0, 0.1);
}

.btn-ghost-dark:hover {
    background: rgba(220, 53, 69, 0.08);
    border-color: rgba(220, 53, 69, 0.4);
    color: #dc3545;
    transform: translateY(-3px);
}

/* ========== WhatsApp flotante ========== */
.whatsapp-float {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: #25d366;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.9rem;
    box-shadow: 0 10px 28px rgba(37, 211, 102, 0.45);
    z-index: 1300;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: translateY(-4px) scale(1.05);
    background: #1eb855;
}

.whatsapp-float::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: #25d366;
    animation: pulse-ring 2s infinite;
    z-index: -1;
}

@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 0.5; }
    80%, 100% { transform: scale(1.7); opacity: 0; }
}

/* ========== Sección Certificados ========== */
.certificates {
    padding: 110px 0;
    background: linear-gradient(160deg, #000 0%, #1a1a1a 100%);
}

.certificates .section-title { color: var(--white); }
.certificates .section-sub { color: rgba(255, 255, 255, 0.7); }
.certificates .section-tag { background: rgba(255, 102, 0, 0.15); }

.cert-search { max-width: 640px; margin: 0 auto; }

.cert-search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--white);
    border-radius: 60px;
    padding: 8px 8px 8px 20px;
    box-shadow: var(--shadow-accent);
}

.cert-search-box > i {
    color: var(--accent);
    font-size: 1.2rem;
}

.cert-search-box input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: inherit;
    font-size: 1rem;
    color: var(--dark);
}

.cert-note {
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    margin-top: 16px;
}

/* Resultado de búsqueda */
#cert-result { max-width: 700px; margin: 30px auto 0; }

.cert-feedback {
    text-align: center;
    padding: 24px;
    border-radius: 16px;
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    font-weight: 600;
}

.cert-feedback.error {
    color: #ffb4b4;
    background: rgba(220, 53, 69, 0.12);
    border-color: rgba(220, 53, 69, 0.35);
}

.cert-found {
    background: var(--white);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    animation: fadeInUp 0.5s ease both;
}

.cert-found .found-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(37, 211, 102, 0.12);
    color: #1eb855;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 16px;
}

.cert-found h3 { color: var(--dark); font-size: 1.4rem; margin-bottom: 6px; }
.cert-found .found-sub { color: var(--gray); font-size: 0.92rem; margin-bottom: 10px; }
.cert-found .found-meta { color: var(--gray); font-size: 1rem; margin-bottom: 20px; }

.cert-preview {
    display: block;
    width: 100%;
    max-width: 460px;
    margin: 0 auto 22px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 14px;
    box-shadow: var(--shadow);
}

.btn-download {
    background: #25d366;
    color: #fff;
    box-shadow: 0 10px 25px rgba(37, 211, 102, 0.3);
}

.btn-download:hover {
    background: #1eb855;
    transform: translateY(-3px);
}

/* ========== Panel admin: login ========== */
.admin-login {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: var(--light);
}

.login-box {
    width: 100%;
    max-width: 360px;
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 20px;
    padding: 34px 28px;
    text-align: center;
}

.login-icon {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: var(--dark);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin: 0 auto 18px;
}

.login-box h3 { color: var(--dark); font-size: 1.4rem; margin-bottom: 6px; }
.login-box p { color: var(--gray); font-size: 0.88rem; margin-bottom: 20px; }
.login-btn { width: 100%; margin-top: 6px; }
.login-error { color: #dc3545; font-size: 0.86rem; margin-top: 12px; display: none; }
.login-error.show { display: block; }

/* ========== Panel admin: pestañas ========== */
.admin-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.admin-tabs {
    display: flex;
    gap: 4px;
    padding: 12px 12px 0;
    background: var(--white);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.admin-tab {
    flex: 1;
    padding: 12px 8px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.84rem;
    color: var(--gray);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    transition: var(--transition);
}

.admin-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.admin-tab i { font-size: 0.95rem; }

/* ========== Formulario de certificado (modal del panel) ========== */
.cert-form-overlay {
    position: absolute;
    inset: 0;
    z-index: 60;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    overflow-y: auto;
    padding: 22px;
}

.cert-form {
    width: 100%;
    max-width: 680px;
    background: var(--white);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.35);
    animation: fadeInUp 0.3s ease both;
}

.cert-form-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--dark);
    color: var(--white);
}

.cert-form-head h3 {
    font-size: 1.05rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.cert-form-head .admin-close {
    background: rgba(255, 255, 255, 0.12);
    color: var(--white);
}

.cert-form-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-height: calc(100vh - 220px);
    overflow-y: auto;
}

.cert-form-foot {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding: 16px 20px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    background: var(--white);
}

.cert-form-foot .btn-ghost-dark {
    background: var(--light);
    color: var(--dark);
    border: 2px solid rgba(0, 0, 0, 0.1);
}

.cert-form-body .chk {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--dark);
    padding: 6px 0;
    cursor: pointer;
}

.cert-form-body .chk input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

/* ========== Plantilla del certificado ========== */
.certificate-a4 {
    width: 880px;
    min-height: 1120px;
    margin: 0 auto;
    background: var(--white);
    position: relative;
    padding: 44px 64px;
    font-family: var(--font);
    color: #1a1a1a;
    text-align: center;
}

.bg-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.cert-inner {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    min-height: 1032px;
}

.cert-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.cert-logo {
    height: 72px;
    width: auto;
    object-fit: contain;
    border-radius: 14px;
    padding: 8px 22px;
    background: var(--primary);
}

.cert-num-box {
    border: 3px solid var(--accent);
    border-radius: 12px;
    padding: 8px 28px;
    font-size: 1.4rem;
    font-weight: 700;
    color: #111;
    letter-spacing: 1px;
}

.cert-title {
    font-size: 2.5rem;
    letter-spacing: 8px;
    font-weight: 700;
    margin: 6px 0 6px;
    color: #111;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 24px;
}

.cert-title::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
    width: 130px;
    height: 4px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
}

.cert-row,
.cert-date-row {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    text-align: left;
}

.cert-title + .cert-row { margin-top: 32px; }
.cert-row + .cert-row { margin-top: 20px; }

.cert-row .label,
.cert-date-row .label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-dark);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    white-space: nowrap;
    padding-bottom: 6px;
}

.cert-row .value,
.cert-date-row .val {
    border-bottom: 2px solid #111;
    padding: 6px 8px;
    text-align: center;
    font-weight: 600;
    letter-spacing: 1px;
}

.cert-row .value {
    flex: 1;
    font-size: 1.7rem;
    text-transform: uppercase;
    min-height: 46px;
}

.cert-date-row { margin: 12px 0 0; }
.cert-checks + .cert-date-row { margin-top: 28px; }
.cert-date-row .val {
    min-width: 260px;
    font-size: 1.25rem;
}

.cert-text {
    font-size: 1.25rem;
    line-height: 1.8;
    margin: 30px 0 10px;
    text-align: left;
    font-weight: 400;
    color: #222;
}

.cert-section-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #111;
    text-align: left;
    margin: 30px 0 18px 0;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 12px;
    text-transform: uppercase;
}

.cert-section-title::before {
    content: '';
    width: 34px;
    height: 4px;
    border-radius: 4px;
    background: var(--accent);
    flex-shrink: 0;
}

.cert-checks {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px 24px;
    margin-bottom: 10px;
    text-align: left;
}

.cert-check {
    display: flex;
    align-items: center;
    font-family: var(--font);
    font-size: 1.02rem;
    line-height: 1.4;
    color: #222;
}

.cert-check .box {
    width: 30px;
    height: 30px;
    border: 2px solid var(--accent);
    border-radius: 6px;
    margin-right: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--accent);
}

.cert-check.on .box { background: var(--accent); color: #000; }
.cert-check.on .box i { font-size: 1rem; }

.cert-sign-area {
    margin-top: 56px;
    position: relative;
    display: inline-block;
}

.cert-firma-img,
.cert-sello-img {
    height: 84px;
    width: auto;
    object-fit: contain;
    display: inline-block;
    margin: 0 12px;
    vertical-align: middle;
}

.cert-firma {
    font-size: 1.7rem;
    font-weight: 700;
    margin-top: 26px;
    margin-bottom: 12px;
}

.cert-firma-label {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: #111;
}

.cert-validate {
    font-size: 0.95rem;
    color: #555;
    margin-top: 12px;
    font-family: var(--font);
}

.cert-footer {
    margin-top: auto;
    padding-top: 26px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    font-size: 1.02rem;
    line-height: 1.7;
    color: #333;
    font-family: var(--font);
}

.cert-footer-text { text-align: right; }
.cert-footer b { color: #111; }

.cert-qr {
    width: 150px;
    text-align: center;
    flex-shrink: 0;
}

.cert-qr-img {
    width: 128px;
    height: 128px;
    display: block;
    margin: 0 auto 8px;
}

.cert-qr-label {
    font-size: 0.72rem;
    color: #666;
    letter-spacing: 0.5px;
}

/* ========== Preloader ========== */
.preloader {
    position: fixed;
    inset: 0;
    z-index: 3000;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Video en tamaño natural, sin estirar ni redimensionar */
.preloader-video {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    margin: auto;
    display: block;
}

/* Prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}