:root {
    --color-bg: #0a0a0a;
    --color-paper: #fcfaf7;
    --color-forest: #1b4332;
    --color-gold: #c5a059;
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Montserrat', sans-serif;
    --book-w: 850px;
    --book-h: 580px;
    --anim-speed: 0.9s;
}

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

body {
    background-color: var(--color-bg);
    background-image: radial-gradient(circle at center, #1a1a1a 0%, #0a0a0a 100%);
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--font-sans);
}

/* UI Superior */
.top-bar {
    position: fixed;
    top: 30px;
    left: 40px;
    right: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    pointer-events: none;
}

.brand-group { display: flex; align-items: center; gap: 15px; pointer-events: auto; }
.mini-logo { width: 35px; height: 35px; background: white; border-radius: 50%; padding: 4px; }
.brand-text { color: white; letter-spacing: 0.2em; font-size: 0.8rem; font-weight: 300; }
.magazine-info { color: var(--color-gold); font-size: 0.65rem; letter-spacing: 0.4em; }

/* Escena 3D */
.book-scene {
    width: var(--book-w);
    height: var(--book-h);
    perspective: 3000px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.book-container {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transform: translateX(18%); /* Compensa la apertura */
    transition: transform 1s ease;
}

.book-container.open { transform: translateX(0%); }

.book-spine {
    position: absolute;
    left: 0; top: 0; width: 40px; height: 100%;
    background: #122b20;
    background-image: linear-gradient(to right, rgba(0,0,0,0.6), transparent 40%);
    z-index: 1000;
    transform: translateX(-100%);
    border-radius: 5px 0 0 5px;
    box-shadow: -10px 0 20px rgba(0,0,0,0.5);
}

/* Hojas */
.sheet {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0; top: 0;
    transform-origin: left center;
    transform-style: preserve-3d;
    transition: transform var(--anim-speed) cubic-bezier(0.645, 0.045, 0.355, 1);
}

.sheet.flipped { transform: rotateY(-178deg); }

.sheet-page {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    background-color: var(--color-paper);
    box-shadow: inset 10px 0 30px rgba(0,0,0,0.05), 15px 10px 30px rgba(0,0,0,0.2);
    overflow: hidden;
}

.sheet-page::before {
    content: ''; position: absolute; inset: 0;
    background-image: url('https://www.transparenttextures.com/patterns/natural-paper.png');
    opacity: 0.2; pointer-events: none;
}

.sheet-page.back {
    transform: rotateY(180deg);
    background-color: #f2eee8;
    border-right: 4px solid rgba(0,0,0,0.1);
}

/* Layouts de Revista */
.mag-layout {
    width: 100%; height: 100%;
    display: flex; padding: 50px;
    box-sizing: border-box;
}

/* Layout Intro: Título y descripción con foto principal */
.layout-intro { flex-direction: column; }
.intro-text { flex: 0 0 auto; margin-bottom: 30px; }
.intro-text .cat { color: var(--color-gold); text-transform: uppercase; letter-spacing: 0.3em; font-size: 0.7rem; }
.intro-text h2 { font-family: var(--font-serif); font-size: 2.8rem; color: var(--color-forest); margin: 10px 0; }
.intro-text p { font-size: 0.95rem; line-height: 1.6; color: #444; max-width: 85%; }
.intro-img { flex: 1; border-radius: 4px; overflow: hidden; box-shadow: 0 10px 25px rgba(0,0,0,0.1); }
.intro-img img { width: 100%; height: 100%; object-fit: cover; }

/* Layout Grid: 3 fotos (1 grande, 2 pequeñas) */
.layout-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 20px; }
.grid-main { height: 100%; border-radius: 4px; overflow: hidden; }
.grid-subs { display: flex; flex-direction: column; gap: 20px; }
.sub-img { flex: 1; border-radius: 4px; overflow: hidden; }
.grid-main img, .sub-img img { width: 100%; height: 100%; object-fit: cover; }

/* Portada Revista */
.cover-mag {
    background-color: var(--color-forest) !important;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: white; text-align: center;
}

.logo-hero { width: 110px; margin-bottom: 40px; }
.cover-mag h1 { font-family: var(--font-serif); font-size: 3.5rem; letter-spacing: 0.2em; text-transform: uppercase; }
.cover-mag p { color: var(--color-gold); letter-spacing: 0.5em; font-size: 0.75rem; margin-top: 20px; }

/* Navegación */
.nav-magazine {
    position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%);
    display: flex; align-items: center; gap: 30px; z-index: 1000;
}

.nav-btn {
    background: rgba(255,255,255,0.05); border: 1px solid var(--color-gold);
    color: var(--color-gold); width: 55px; height: 55px; border-radius: 50%;
    cursor: pointer; display: flex; align-items: center; justify-content: center; transition: 0.3s;
}

.nav-btn:hover:not(:disabled) { background: var(--color-gold); color: white; }
.nav-btn:disabled { opacity: 0.2; cursor: default; }
.nav-btn svg { width: 26px; fill: currentColor; }
.page-indicator { color: white; letter-spacing: 0.4em; font-size: 0.9rem; }