/* ============================================================
   ESTILO: Razonamiento Lógico Matemático - FCA (VERSIÓN FINAL)
   ============================================================ */

:root {
    --azul-unam: #003d7c;
    --azul-oscuro: #002b5b;
    --dorado-unam: #b38e5d;
    --gris-fondo: #ebf0f4; 
    --blanco: #ffffff;
    --texto: #2d3748;
    --borde-tarjeta: #d1d9e6;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--gris-fondo);
    color: var(--texto);
    line-height: 1.7;
    scroll-behavior: smooth;
}

/* --- HEADER --- */
header {
    background: rgba(0, 61, 124, 0.98);
    padding: 1rem 8%;
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    border-bottom: 3px solid var(--dorado-unam);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.logo { color: white; font-weight: 800; letter-spacing: 1px; font-size: 1.1rem; }
.logo strong { color: var(--dorado-unam); }

nav a {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    margin-left: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: color 0.3s ease;
}

nav a:hover { color: var(--dorado-unam); }

/* --- HERO --- */
.hero {
    background: linear-gradient(135deg, var(--azul-unam), var(--azul-oscuro));
    color: white;
    padding: 4rem 10% 6rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    opacity: 0.07;
    background-image: radial-gradient(#ffffff 1px, transparent 1px);
    background-size: 30px 30px;
}

.hero h1 { font-size: 2.8rem; margin-bottom: 0.5rem; letter-spacing: -1.5px; position: relative; }
.hero p { font-size: 1.1rem; opacity: 0.9; max-width: 600px; margin: 0 auto; position: relative; }

/* --- CONTENEDOR --- */
.container {
    max-width: 850px;
    margin: -40px auto 4rem;
    padding: 0 20px;
    position: relative;
    z-index: 10;
}

/* --- TARJETAS --- */
.unit-card {
    background: var(--blanco);
    border-radius: 12px;
    padding: 2.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--borde-tarjeta); 
    box-shadow: 0 8px 25px rgba(0, 43, 91, 0.08);
}

.unit-tag {
    color: var(--dorado-unam);
    font-weight: 800;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 1px;
    display: block;
    margin-bottom: 0.5rem;
}

h2 { color: var(--azul-oscuro); font-size: 1.6rem; margin-bottom: 1rem; }

.logic-concept {
    font-family: 'Lora', serif;
    background: #f8fafc;
    border-left: 5px solid var(--dorado-unam);
    padding: 1.2rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--azul-oscuro);
}

.h5p-container {
    background: #fdfdfd;
    border: 1.5px dashed #cbd5e0;
    padding: 1.5rem;
    border-radius: 10px;
    margin-top: 1.5rem;
}

/* --- SECCIÓN DE VENTAS (REDUCIDA Y OPTIMIZADA) --- */
.sales-box {
    background: var(--azul-oscuro);
    color: white;
    padding: 2.5rem; /* Padding reducido */
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--dorado-unam);
}

.sales-box h2 { color: white; font-size: 1.4rem; margin-bottom: 0.5rem; }
.sales-box p { font-size: 0.95rem; opacity: 0.9; margin-bottom: 1.5rem; }

/* --- SECCIÓN MOODLE --- */
.moodle-info {
    text-align: center;
    padding: 2.5rem;
    background: white;
    border-radius: 12px;
    margin-bottom: 2rem;
    border: 1px solid var(--borde-tarjeta);
}

/* --- BOTONES --- */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    margin: 5px;
}

.btn-amazon { background: var(--dorado-unam); color: white; }
.btn-fca { border: 2px solid var(--dorado-unam); color: var(--dorado-unam); }
.btn-moodle { background: var(--azul-oscuro); color: white; border: 1px solid var(--dorado-unam); }

.btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.2); }

/* --- FOOTER --- */
footer {
    text-align: center;
    padding: 4rem 1rem;
    color: #94a3b8;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

@media (max-width: 600px) {
    .hero h1 { font-size: 1.8rem; }
    .unit-card { padding: 1.5rem; }
    header { flex-direction: column; }
}