/* ============================================
   estilos.css — RK Experience · Revista Style
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400&family=Montserrat:wght@300;400;600&display=swap');

/* ---- Variables ---- */
:root {
    --bg-dark:    #0e0515;
    --bg-mid:     #1c0822;
    --purple:     #5e1c4e;
    --gold:       #c9a84c;
    --gold-light: #e8c97a;
    --white:      #ffffff;
    --glass-bg:   rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.12);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; }

body {
    background: radial-gradient(ellipse at top right, var(--purple) 0%, var(--bg-mid) 45%, var(--bg-dark) 100%);
    color: var(--white);
    font-family: 'Montserrat', 'Segoe UI', sans-serif;
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Fondo con líneas sutiles tipo papel de revista */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 60px,
            rgba(255,255,255,0.013) 60px,
            rgba(255,255,255,0.013) 61px
        );
    pointer-events: none;
    z-index: 0;
}

/* ============================================
   INDEX — Portada estilo revista de lujo
   ============================================ */

.index-wrapper {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
    padding: 2rem 1rem;
    text-align: center;
}

/* Separador dorado estilo editorial */
.magazine-rule {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0 auto 1.5rem;
    width: 100%;
    max-width: 420px;
}

.magazine-rule::before,
.magazine-rule::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.magazine-rule span {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    color: var(--gold);
    font-size: 0.72rem;
    letter-spacing: 3px;
    white-space: nowrap;
    text-transform: uppercase;
}

/* Logo RK */
.rk-logo {
    width: min(280px, 58vw);
    height: auto;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 24px rgba(201,168,76,0.2));
}

/* Glass card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem 1.5rem;
    box-shadow:
        0 8px 32px rgba(0,0,0,0.45),
        inset 0 1px 0 rgba(255,255,255,0.07);
    width: 100%;
    max-width: 480px;
    position: relative;
}

/* Marco interior dorado sutil */
.glass-card::before {
    content: '';
    position: absolute;
    top: 10px; left: 10px; right: 10px; bottom: 10px;
    border: 1px solid rgba(201,168,76,0.1);
    border-radius: 10px;
    pointer-events: none;
}

.glass-card h2 {
    font-family: 'Playfair Display', serif;
    font-weight: 400;
    font-size: clamp(1rem, 3vw, 1.35rem);
    letter-spacing: 2px;
    color: rgba(255,255,255,0.82);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

/* Botones de menú */
.btn-menu {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 12px;
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(201,168,76,0.4);
    border-radius: 8px;
    text-decoration: none;
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(0.78rem, 2.5vw, 1rem);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.btn-menu::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(201,168,76,0.12), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-menu:hover,
.btn-menu:focus-visible {
    background: rgba(201,168,76,0.08);
    border-color: var(--gold);
    color: var(--gold-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(201,168,76,0.18);
    outline: none;
}

.btn-menu:hover::after { opacity: 1; }
.btn-menu:active { transform: translateY(0); }

.btn-menu img {
    flex-shrink: 0;
    height: 28px;
    width: auto;
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    position: relative;
    z-index: 1;
    margin-top: auto;
    padding: 16px 0;
    text-align: center;
    font-size: 0.78rem;
    color: rgba(255,255,255,0.4);
    letter-spacing: 1px;
}

.kai-logo {
    height: 30px;
    width: auto;
    margin-left: 6px;
    vertical-align: middle;
    opacity: 0.65;
}

/* ============================================
   CONTENIDO — Visor de menú tipo revista
   ============================================ */

/* Nav bar */
.revista-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(14, 5, 21, 0.93);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(201,168,76,0.18);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.revista-nav a {
    color: var(--gold-light);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    transition: color 0.2s;
    -webkit-tap-highlight-color: transparent;
}

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

.revista-nav .nav-title {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    color: rgba(255,255,255,0.45);
    font-size: 0.82rem;
    letter-spacing: 2px;
}

/* Wrapper del visor */
.book-wrapper {
    position: relative;
    z-index: 1;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.75rem 0.5rem 0;
}

/* Logo pequeño */
.content-logo {
    width: min(90px, 20vw);
    height: auto;
    margin-bottom: 0.5rem;
    opacity: 0.88;
}

/* Contenedor del flipbook */
.book-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

/* Páginas (dimensionadas por page-flip) */
.page {
    background-color: var(--bg-mid);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.page img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    display: block;
}

/* Controles de navegación */
.book-controls {
    text-align: center;
    padding: 14px 0 6px;
    z-index: 10;
    width: 100%;
}

.btn-nav {
    background: transparent;
    color: var(--gold-light);
    border: 1px solid rgba(201,168,76,0.35);
    border-radius: 6px;
    padding: 8px 18px;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.25s ease;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.btn-nav:hover,
.btn-nav:focus {
    background: rgba(201,168,76,0.1);
    border-color: var(--gold);
    outline: none;
}

.btn-nav:active {
    background: rgba(201,168,76,0.18);
    transform: scale(0.97);
}

.page-counter {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    color: rgba(255,255,255,0.65);
    font-size: 0.88rem;
    margin: 0 14px;
    display: inline-block;
    min-width: 80px;
}

.drag-hint {
    font-size: 0.7rem;
    color: rgba(255,255,255,0.28);
    margin-top: 6px;
    letter-spacing: 0.5px;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Móvil pequeño (< 480px) */
@media (max-width: 479px) {
    .glass-card        { padding: 1.4rem 1rem; max-width: 94vw; }
    .rk-logo           { width: min(190px, 62vw); margin-bottom: 1rem; }
    .btn-menu          { font-size: 0.72rem; letter-spacing: 1.5px; padding: 12px 12px; }
    .btn-menu img      { height: 24px; }
    .btn-nav           { padding: 7px 13px; font-size: 0.75rem; }
    .page-counter      { font-size: 0.8rem; margin: 0 10px; }
    footer             { padding: 10px 0; }
    .kai-logo          { height: 24px; }
}

/* Móvil estándar (480px – 767px) */
@media (min-width: 480px) and (max-width: 767px) {
    .glass-card { padding: 1.75rem 1.25rem; }
    .rk-logo    { width: min(230px, 55vw); }
}

/* Tablet portrait (768px – 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    .glass-card   { padding: 2.25rem 2rem; max-width: 520px; }
    .rk-logo      { width: 290px; }
    .btn-menu     { font-size: 0.95rem; }
    .content-logo { width: 105px; }
    .kai-logo     { height: 34px; }
}

/* Tablet landscape & desktop (≥ 1024px) */
@media (min-width: 1024px) {
    .glass-card   { padding: 2.5rem 2.5rem; max-width: 540px; }
    .rk-logo      { width: 320px; }
    .btn-menu     { font-size: 1rem; }
    .content-logo { width: 120px; }
    .kai-logo     { height: 38px; }
    .btn-nav      { padding: 9px 22px; }
}

/* Landscape muy corto (celular horizontal, altura < 500px) */
@media (max-height: 500px) and (orientation: landscape) {
    .index-wrapper  { padding: 0.6rem 1rem; justify-content: flex-start; padding-top: 0.8rem; }
    .rk-logo        { width: min(130px, 25vw); margin-bottom: 0.6rem; }
    .magazine-rule  { margin-bottom: 0.6rem; }
    .glass-card     { padding: 0.9rem 1.25rem; }
    .glass-card h2  { font-size: 0.85rem; margin-bottom: 0.6rem; }
    .btn-menu       { padding: 10px 12px; }
    footer          { padding: 6px 0; }
    .book-wrapper   { padding: 0.4rem 0.5rem 0; }
    .content-logo   { width: 60px; margin-bottom: 0.25rem; }
    .book-controls  { padding: 8px 0 4px; }
}