/* PALETA DE COLOR Y CONFIGURACIÓN ESTÉTICA */
:root {
    --dark-grey: #333132;
    --ochre: #D68A27;
    --cream: #F0F0D8;
    --white: #FFFFFF;
    --light-grey: #E4E4CD;
    --font-main: 'Montserrat', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--cream);
    color: var(--dark-grey);
    line-height: 1.6;
}

.container {
    width: 92%;
    max-width: 1100px;
    margin: 0 auto;
}

.text-center {
    text-align: center;
}

h1, h2, h3, h4 {
    text-transform: uppercase;
}

/* CABECERA */
.header {
    background-color: var(--dark-grey);
    color: var(--ochre);
    padding: 25px 0;
    text-align: center;
}

.header h1 {
    font-weight: 900;
    font-size: 2.6rem;
    letter-spacing: 2px;
}

.header p {
    font-weight: 700;
    color: var(--white);
    letter-spacing: 1px;
    font-size: 1rem;
}

/* HERO SECTION */
.hero {
    padding: 70px 0;
    background-color: var(--cream);
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h2 {
    color: var(--dark-grey);
    font-size: 2.3rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-text p {
    font-size: 1.1rem;
    margin-bottom: 35px;
}

.hero-image {
    flex: 1;
    width: 100%;
}

/* Forzar que el slider dentro del hero se adapte a su columna sin márgenes extra */
.hero-image .slider-container {
    margin: 0;
    max-width: 100%;
}

.btn-primary {
    display: inline-block;
    background-color: var(--ochre);
    color: var(--white);
    padding: 16px 35px;
    text-decoration: none;
    font-weight: 700;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    transition: background 0.3s;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.btn-primary:hover, .btn-primary:disabled {
    background-color: #b5721c;
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ACERCA DEL PROYECTO */
.about {
    background-color: var(--dark-grey);
    color: var(--cream);
    padding: 70px 0;
    text-align: center;
}

.about h2 {
    color: var(--ochre);
    margin-bottom: 45px;
    font-size: 1.8rem;
    font-weight: 900;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 35px;
}

.about-card {
    background-color: rgba(255, 255, 255, 0.04);
    padding: 35px;
    border-radius: 6px;
    border-bottom: 4px solid var(--ochre);
    text-align: left;
}

.about-card h3 {
    margin-bottom: 15px;
    color: var(--white);
    font-size: 1.2rem;
}

/* SECCIÓN SLIDER ANTES / DESPUÉS (ESTÁTICO TOTAL) */
.restoration {
    padding: 70px 0;
}

.restoration h2 {
    font-size: 1.8rem;
    font-weight: 900;
    margin-bottom: 10px;
}

.slider-container {
    position: relative;
    width: 100%;
    max-width: 850px;
    margin: 45px auto 0 auto;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.25);
    aspect-ratio: 16/9;
    background-color: var(--dark-grey);
}

.slider-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    display: block;
}

.img-foreground {
    clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
    z-index: 5;
}

.slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: ew-resize;
    z-index: 20;
}

.slider-line {
    position: absolute;
    top: 0;
    left: 50%;
    width: 4px;
    height: 100%;
    background-color: var(--ochre);
    z-index: 10;
    pointer-events: none;
    transform: translateX(-50%);
}

.slider-button {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 44px;
    height: 44px;
    background-color: var(--ochre);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    z-index: 11;
    pointer-events: none;
    transform: translate(-50%, -50%);
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

/* GUÍA DE DIGITALIZACIÓN EDITORIAL */
.digitalization-guide {
    padding: 80px 0;
    background-color: var(--dark-grey);
    color: var(--white);
}

.digitalization-guide h2 {
    text-align: center;
    color: var(--ochre);
    font-size: 1.8rem;
    font-weight: 900;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px auto;
    color: var(--cream);
    font-size: 1.05rem;
}

.guide-container {
    display: flex;
    gap: 40px;
    background-color: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 8px;
    overflow: hidden;
}

.guide-sidebar {
    flex: 1;
    background-color: rgba(214, 138, 39, 0.08);
    padding: 45px;
    border-right: 2px solid var(--ochre);
    position: relative;
}

.badge-recommended {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: var(--ochre);
    color: var(--white);
    padding: 4px 14px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 3px;
    letter-spacing: 1px;
}

.guide-sidebar h3 {
    color: var(--ochre);
    font-size: 1.3rem;
    margin-bottom: 20px;
    margin-top: 10px;
}

.sidebar-highlight {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 15px;
    line-height: 1.4;
}

.sidebar-list {
    list-style: none;
    margin-top: 25px;
}

.sidebar-list li {
    margin-bottom: 12px;
    padding-left: 24px;
    position: relative;
    font-size: 0.95rem;
}

.sidebar-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--ochre);
    font-weight: 900;
}

.guide-main {
    flex: 1.2;
    padding: 45px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.guide-main h3 {
    color: var(--white);
    font-size: 1.3rem;
    margin-bottom: 25px;
}

.instruction-block {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.instruction-block:last-child {
    margin-bottom: 0;
}

.step-num {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--ochre);
    opacity: 0.6;
    line-height: 1;
}

.instruction-text h4 {
    color: var(--cream);
    font-size: 1rem;
    margin-bottom: 6px;
    letter-spacing: 0.5px;
}

.instruction-text p {
    font-size: 0.92rem;
    color: rgba(255,255,255,0.75);
}

/* SECCIÓN FORMULARIO DE CARGA */
.upload {
    padding: 70px 0;
    background-color: var(--light-grey);
}

.upload h2 {
    text-align: center;
    margin-bottom: 12px;
    font-size: 1.8rem;
}

.upload p {
    text-align: center;
    margin-bottom: 45px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.upload-form {
    max-width: 650px;
    margin: 0 auto;
    background: var(--white);
    padding: 45px;
    border-radius: 6px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.06);
}

.form-group {
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 700;
    font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #C8C8AF;
    border-radius: 4px;
    font-family: var(--font-main);
    font-size: 0.95rem;
    background-color: #FAF9F2;
}

.form-group textarea {
    resize: vertical;
}

.form-group input[type="file"] {
    display: block;
    width: 100%;
    padding: 12px;
    background: var(--cream);
    border: 1px dashed var(--dark-grey);
    border-radius: 4px;
    cursor: pointer;
}

.terms {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.88rem;
    line-height: 1.4;
    margin-top: 25px;
}

.terms input[type="checkbox"] {
    margin-top: 4px;
    cursor: pointer;
}

.upload-form button {
    width: 100%;
    margin-top: 20px;
}

/* PIE DE PÁGINA */
.footer {
    background-color: var(--dark-grey);
    color: var(--white);
    text-align: center;
    padding: 45px 0;
    font-size: 0.95rem;
}

.footer p {
    margin-bottom: 5px;
}

/* RESPONSIVE */
@media (max-width: 850px) {
    .hero-content {
        flex-direction: column;
        gap: 35px;
    }
    .guide-container {
        flex-direction: column;
    }
    .guide-sidebar {
        border-right: none;
        border-bottom: 2px solid var(--ochre);
    }
    /* ==========================================
   BOTÓN FLOTANTE DE WHATSAPP
   ========================================== */
.whatsapp-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #25D366;
    color: #FFFFFF !important;
    border-radius: 50px;
    padding: 12px 22px;
    font-weight: 700;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    z-index: 9999; /* Asegura que flote sobre sliders y formularios */
    transition: transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

.whatsapp-btn:hover {
    background-color: #20ba5a;
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 30px rgba(0,0,0,0.3);
}

/* Optimización para celulares (Se vuelve redondo para no tapar el formulario) */
@media (max-width: 480px) {
    .whatsapp-btn span {
        display: none; /* Oculta el texto en pantallas pequeñas */
    }
    .whatsapp-btn {
        padding: 14px;
        border-radius: 50%;
        bottom: 20px;
        right: 20px;
    }
}
}

/* ESTILOS DEL CARGADOR ANIMADO */
.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border-left-color: var(--ochre);
    animation: spin 1s linear infinite;
    margin: 15px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}