:root {
    --bg-color: #0f0f10;
    --card-bg: #1a1a1b;
    --border-color: #333;
    --text-main: #e0e0e0;
    --text-muted: #999;
    
    /* Paleta Vajrakula */
    --gold: #d4af37;
    --red: #c92a2a;
    --blue: #2b6cb0;
    --violet: #805ad5;
    --white: #f7fafc;
    --green: #2f855a;
    
    /* Estados */
    --good: #38a169;
    --bad: #e53e3e;
}

* { box-sizing: border-box; }

body {
    font-family: 'Palatino', 'Helvetica Neue', serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- NAVEGACIÓN SUPERIOR (GLOBAL) --- */
.top-nav {
    width: 100%;
    padding: 15px 20px;
    background: #080808;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}
.nav-back { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; transition: 0.3s; }
.nav-back:hover { color: var(--gold); }

.lang-switch button {
    background: transparent; border: 1px solid #444; color: #666; padding: 5px 10px; cursor: pointer; transition: 0.3s; border-radius: 4px;
}
.lang-switch button.active { border-color: var(--gold); color: var(--gold); }

/* --- CONTENEDORES --- */
.container { width: 100%; max-width: 1200px; padding: 40px 20px; flex: 1; margin: 0 auto; }

header { text-align: center; margin-bottom: 40px; border-bottom: 2px solid var(--red); padding-bottom: 20px; width: 100%; }
h1 { color: var(--gold); text-transform: uppercase; margin: 0 0 10px 0; letter-spacing: 2px; font-size: 2.2rem; }
.subtitle { color: var(--text-muted); font-size: 1.1rem; margin: 0; }

/* --- HUB PRINCIPAL (TARJETAS) --- */
/* Esto es lo que faltaba y arregla el índice */
.hub-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 25px; 
    width: 100%;
}

.hub-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.2s, border-color 0.2s;
    min-height: 200px;
    justify-content: center;
}

.hub-card:hover { 
    transform: translateY(-5px); 
    border-color: var(--gold); 
    background: #222;
}

.card-icon { font-size: 3rem; margin-bottom: 15px; color: var(--gold); }
.card-title { font-size: 1.3rem; font-weight: bold; margin-bottom: 10px; color: #fff; }
.card-desc { font-size: 0.9rem; color: #888; line-height: 1.4; }


/* --- CALENDARIO MENSUAL --- */
.calendar-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 20px; }
.month-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 8px; overflow: hidden; }
.month-header { background: #000; padding: 15px; border-bottom: 1px solid #333; text-align: center; color: var(--gold); font-weight: bold; font-size: 1.1rem; }

.event-row { display: flex; align-items: center; padding: 8px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.date-badge { font-weight: bold; min-width: 30px; margin-right: 10px; text-align: center; }

/* Tipos Eventos */
.t-guru { border-left: 3px solid var(--gold); background: rgba(212, 175, 55, 0.1); } .t-guru .date-badge { color: var(--gold); }
.t-dakini { border-left: 3px solid var(--blue); background: rgba(43, 108, 176, 0.1); } .t-dakini .date-badge { color: var(--blue); }
.t-prot { border-left: 3px solid var(--red); background: rgba(201, 42, 42, 0.1); } .t-prot .date-badge { color: var(--red); }
.t-fest { border-left: 3px solid var(--white); background: rgba(255,255,255,0.05); }

/* --- LIBRO (SIDEBAR LAYOUT) --- */
.book-layout { display: flex; height: calc(100vh - 160px); border: 1px solid var(--border-color); border-radius: 8px; overflow: hidden; margin-top: 20px; }
.book-sidebar { width: 320px; background: #151515; border-right: 2px solid var(--red); overflow-y: auto; display: flex; flex-direction: column; flex-shrink: 0; }
.sidebar-header { background: #000; color: var(--gold); padding: 15px; text-align: center; border-bottom: 1px solid #333; position: sticky; top: 0; z-index: 10; }
.nav-group-header { background: #222; color: #888; padding: 5px 15px; font-size: 0.75rem; text-transform: uppercase; font-weight: bold; border-top: 1px solid #333; }
.nav-item { padding: 12px 15px; cursor: pointer; border-bottom: 1px solid #222; font-size: 0.9rem; color: #ccc; transition: 0.2s; }
.nav-item:hover, .nav-item.active { background: var(--red); color: #fff; }

.book-content { flex-grow: 1; overflow-y: auto; padding: 40px; background: var(--bg-color); }
.content-card { max-width: 800px; margin: 0 auto; background: var(--card-bg); padding: 40px; border-radius: 8px; border-top: 4px solid var(--gold); }

/* Elementos del Libro */
.practice-number { color: var(--red); font-weight: bold; display: block; margin-bottom: 5px; text-transform: uppercase; font-size: 0.9rem; }
.section-box { margin-bottom: 25px; }
.label { color: var(--gold); font-weight: bold; font-size: 0.8rem; text-transform: uppercase; display: block; margin-bottom: 5px; }
.vis-box { background: rgba(47, 133, 90, 0.1); border-left: 3px solid var(--green); padding: 15px; color: #ddd; font-style: italic; }
.prayer-box { background: rgba(212, 175, 55, 0.05); border: 1px solid var(--gold); padding: 25px; white-space: pre-wrap; font-size: 1.1rem; line-height: 1.6; color: #fff; }
.mantra-box { text-align: center; border: 2px dashed #444; padding: 15px; background: #111; }
.mantra-text { color: var(--red); font-weight: bold; font-size: 1.2rem; letter-spacing: 1px; }

/* --- CALCULADORA --- */
.sridpaho-visual { width: 150px; height: 150px; margin: 0 auto 20px; background: var(--gold); border-radius: 50%; border: 5px double var(--red); display: flex; align-items: center; justify-content: center; box-shadow: 0 0 20px rgba(212, 175, 55, 0.2); }
.calc-container { max-width: 800px; margin: 0 auto; background: var(--card-bg); padding: 30px; border-radius: 8px; border-top: 4px solid var(--gold); }
.input-group input { width: 100%; padding: 15px; background: #000; border: 1px solid #444; color: #fff; text-align: center; font-size: 1.2rem; margin-bottom: 20px; }
.btn-calc { width: 100%; padding: 15px; background: var(--red); color: white; border: none; font-weight: bold; cursor: pointer; text-transform: uppercase; font-size: 1rem; }
.btn-calc:hover { background: var(--gold); color: #000; }

/* --- UTILIDADES --- */
.warning-box { background: rgba(201, 42, 42, 0.15); border: 1px solid var(--red); padding: 15px; border-radius: 6px; margin-bottom: 20px; display: flex; align-items: center; gap: 15px; }
.warning-link { color: var(--gold); font-weight: bold; text-decoration: underline; }
.hidden { display: none !important; }
.search-bar { width: 100%; padding: 10px; background: #222; border: 1px solid #444; color: #fff; margin-bottom: 10px; }

footer { margin-top: auto; padding: 30px; text-align: center; font-size: 0.8rem; color: #666; border-top: 1px solid #222; }

@media (max-width: 768px) {
    .book-layout { flex-direction: column; height: auto; }
    .book-sidebar { width: 100%; height: 300px; }
}