/* ============================================
   IDENTIDAD VISUAL: LEÑA Y CARBÓN DEL SUR S.A.C.
   Inspiración: Arco Parabólico y colores de Tacna
   Paleta: Rosado Cantera, Rojo Tacna, Amarillo, Celeste, Granate
   ============================================ */

:root {
    --rosado-cantera: #D4A5A5;
    --rojo-tacna: #B22222;
    --amarillo-tacna: #F4C430;
    --celeste-cielo: #87CEEB;
    --granate: #800020;
    --buganvilla: #C71585;
    --blanco-piedra: #FDFCF9;
    --gris-cantera: #E8E0D5;
    --texto-oscuro: #2B2B2B;
    --sombra-arco: rgba(178, 34, 34, 0.15);
}

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

body {
    font-family: 'Open Sans', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--blanco-piedra);
    color: var(--texto-oscuro);
    line-height: 1.75;
    background-image: 
        radial-gradient(circle at 10% 10%, rgba(212, 165, 165, 0.08) 0%, transparent 40%),
        repeating-linear-gradient(45deg, transparent 0, transparent 100px, rgba(135, 206, 235, 0.03) 100px, rgba(135, 206, 235, 0.03) 101px);
}

/* --- Contenedor --- */
.contenedor-tacna {
    width: 93%;
    max-width: 1180px;
    margin: 0 auto;
}

/* --- Tipografía --- */
h1, h2, h3, h4 {
    font-family: 'Cinzel', 'Georgia', serif;
    color: var(--granate);
    letter-spacing: 0.5px;
    line-height: 1.2;
}
h1 { font-size: 2.8rem; }
h2 { 
    font-size: 2rem; 
    margin-bottom: 1.3rem;
    text-align: center;
    position: relative;
}
h2::after {
    content: '⛰';
    display: block;
    color: var(--rosado-cantera);
    font-size: 1.5rem;
    margin-top: 0.3rem;
}
h3 { font-size: 1.4rem; color: var(--rojo-tacna); margin-bottom: 0.8rem; }

p { margin-bottom: 1.2rem; }

a {
    color: var(--rojo-tacna);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}
a:hover { color: var(--granate); }

/* --- Cabecera con Arco Parabólico --- */
#cabecera-arco {
    background-color: var(--granate);
    color: var(--blanco-piedra);
    padding: 0;
    position: relative;
    border-bottom: 6px solid var(--rosado-cantera);
}
#cabecera-arco::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 80' preserveAspectRatio='none'%3E%3Cpath fill='%23D4A5A5' fill-opacity='0.25' d='M0,80 L0,40 Q720,-20 1440,40 L1440,80 Z'/%3E%3C/svg%3E");
    background-size: cover;
    background-repeat: no-repeat;
    pointer-events: none;
}
.cabecera-contenido {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    padding: 22px 0;
    position: relative;
    z-index: 1;
}
.logo-arco {
    font-family: 'Cinzel', serif;
    font-size: 1.9rem;
    color: var(--blanco-piedra);
}
.logo-arco em {
    color: var(--amarillo-tacna);
    font-style: normal;
    font-weight: 400;
}
.contacto-cabecera {
    text-align: right;
    font-size: 0.9rem;
    color: var(--rosado-cantera);
}
.contacto-cabecera p { margin: 2px 0; }
.contacto-cabecera a { color: var(--amarillo-tacna); }

/* --- Navegación --- */
#menu-tacna {
    background-color: var(--rojo-tacna);
    border-bottom: 3px solid var(--amarillo-tacna);
}
#menu-tacna ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}
#menu-tacna a {
    display: block;
    padding: 16px 26px;
    color: var(--blanco-piedra);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    border-bottom: 4px solid transparent;
    transition: all 0.3s;
}
#menu-tacna a:hover, #menu-tacna a.menu-activo {
    color: var(--amarillo-tacna);
    border-bottom-color: var(--amarillo-tacna);
    background-color: rgba(0, 0, 0, 0.1);
}

/* --- Banner Principal (Arco) --- */
.banner-arco {
    background: linear-gradient(180deg, var(--granate) 0%, #5C0016 100%);
    color: var(--blanco-piedra);
    padding: 80px 25px 70px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 5px solid var(--rosado-cantera);
}
.banner-arco::before {
    content: '⌒';
    font-size: 12rem;
    color: var(--rosado-cantera);
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.15;
    line-height: 1;
    pointer-events: none;
}
.banner-arco h1 {
    color: var(--blanco-piedra);
    font-size: 2.7rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}
.banner-arco h1 span { color: var(--amarillo-tacna); }
.banner-arco p {
    font-size: 1.15rem;
    max-width: 780px;
    margin: 0 auto 2.2rem;
    color: #E8DEDE;
    text-align: center;
    position: relative;
    z-index: 1;
}
.boton-tacna {
    display: inline-block;
    background-color: var(--amarillo-tacna);
    color: var(--granate);
    padding: 15px 40px;
    font-weight: 700;
    font-size: 1rem;
    border-radius: 2px;
    letter-spacing: 1px;
    text-transform: uppercase;
    box-shadow: 0 5px 0 var(--rojo-tacna);
    transition: all 0.2s;
    position: relative;
    z-index: 1;
}
.boton-tacna:hover {
    background-color: var(--rojo-tacna);
    color: var(--blanco-piedra);
    box-shadow: 0 2px 0 var(--granate);
    transform: translateY(3px);
    text-decoration: none;
}

/* --- Secciones --- */
.bloque-tacna {
    padding: 65px 0;
}
.bloque-rosado {
    background-color: rgba(212, 165, 165, 0.10);
}
.bloque-celeste {
    background-color: rgba(135, 206, 235, 0.10);
}
.titulo-central {
    text-align: center;
    margin-bottom: 2.8rem;
}

/* --- Tarjetas de Producto --- */
.rejilla-productos-tacna {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
    gap: 2.2rem;
}
.tarjeta-carbon-sur {
    background: #FFFFFF;
    border: 1px solid var(--gris-cantera);
    border-top: 6px solid var(--rosado-cantera);
    padding: 2rem;
    border-radius: 4px;
    box-shadow: 0 3px 12px var(--sombra-arco);
    transition: transform 0.3s, box-shadow 0.3s;
}
.tarjeta-carbon-sur:hover {
    border-top-color: var(--amarillo-tacna);
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(178, 34, 34, 0.12);
}
.tarjeta-carbon-sur h3 {
    color: var(--granate);
    border-bottom: 2px dashed var(--rosado-cantera);
    padding-bottom: 0.5rem;
}
.tarjeta-carbon-sur ul {
    list-style: none;
    padding: 0;
    margin-top: 0.8rem;
}
.tarjeta-carbon-sur li {
    padding: 6px 0 6px 24px;
    position: relative;
    border-bottom: 1px solid #F5F0EB;
    font-size: 0.95rem;
}
.tarjeta-carbon-sur li:last-child { border-bottom: none; }
.tarjeta-carbon-sur li::before {
    content: '▪';
    color: var(--rojo-tacna);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* --- Reseñas --- */
.rejilla-opiniones-tacna {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}
.tarjeta-opinion-tacna {
    background: #FFFFFF;
    border-left: 6px solid var(--celeste-cielo);
    border-bottom: 4px solid var(--rosado-cantera);
    padding: 2rem;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    position: relative;
}
.tarjeta-opinion-tacna::before {
    content: '“';
    font-family: 'Georgia', serif;
    font-size: 5rem;
    color: var(--rosado-cantera);
    position: absolute;
    top: -15px;
    left: 12px;
    line-height: 1;
    opacity: 0.4;
}
.texto-opinion-tacna {
    font-style: italic;
    color: #555;
    margin-bottom: 1.4rem;
    padding-top: 12px;
    position: relative;
    z-index: 1;
}
.firma-opinion-tacna {
    display: flex;
    align-items: center;
    gap: 14px;
}
.avatar-tacna {
    width: 46px;
    height: 46px;
    background-color: var(--granate);
    color: var(--amarillo-tacna);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    border: 2px solid var(--rosado-cantera);
}
.datos-firma-tacna strong { display: block; color: var(--granate); font-size: 0.95rem; }
.datos-firma-tacna span { font-size: 0.82rem; color: #777; }

/* --- Contacto --- */
.contacto-doble-tacna {
    display: flex;
    flex-wrap: wrap;
    gap: 2.5rem;
}
.panel-datos-tacna, .panel-formulario-tacna {
    flex: 1;
    min-width: 300px;
    background: #FFFFFF;
    padding: 2.2rem;
    border-radius: 4px;
    border: 1px solid var(--gris-cantera);
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.06);
}
.panel-datos-tacna h3, .panel-formulario-tacna h3 {
    color: var(--granate);
    border-bottom: 3px solid var(--amarillo-tacna);
    padding-bottom: 0.7rem;
    margin-bottom: 1.3rem;
}
.panel-formulario-tacna input,
.panel-formulario-tacna textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 1rem;
    border: 1px solid var(--gris-cantera);
    border-radius: 3px;
    font-family: inherit;
    font-size: 0.95rem;
    background-color: var(--blanco-piedra);
}
.panel-formulario-tacna input:focus,
.panel-formulario-tacna textarea:focus {
    border-color: var(--rojo-tacna);
    outline: none;
    background-color: #FFFFFF;
}
.panel-formulario-tacna button {
    background-color: var(--rojo-tacna);
    color: var(--blanco-piedra);
    padding: 14px 28px;
    border: none;
    border-radius: 3px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.3s;
}
.panel-formulario-tacna button:hover {
    background-color: var(--granate);
}

/* --- Pie de página --- */
#pie-tacna {
    background-color: var(--granate);
    color: #D4C4C4;
    padding: 50px 0 25px;
    font-size: 0.9rem;
    border-top: 6px solid var(--rosado-cantera);
}
.pie-contenido-tacna {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 2rem;
}
.columna-pie-tacna { flex: 1; min-width: 230px; }
.columna-pie-tacna h4 {
    color: var(--amarillo-tacna);
    font-family: 'Open Sans', sans-serif;
    text-transform: uppercase;
    font-size: 0.82rem;
    letter-spacing: 1.5px;
    margin-bottom: 1rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid rgba(212, 165, 165, 0.3);
}
.columna-pie-tacna p { margin: 5px 0; }
.columna-pie-tacna a { color: #D4C4C4; }
.columna-pie-tacna a:hover { color: var(--amarillo-tacna); }
.pie-legal-tacna {
    text-align: center;
    margin-top: 2.8rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(212, 165, 165, 0.2);
    font-size: 0.82rem;
    color: #A08080;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .cabecera-contenido { flex-direction: column; text-align: center; gap: 12px; }
    .contacto-cabecera { text-align: center; }
    .contacto-cabecera p { text-align: center; }
    #menu-tacna ul { flex-direction: column; }
    #menu-tacna a { text-align: center; border-bottom: 1px solid var(--amarillo-tacna); }
    .banner-arco h1 { font-size: 2rem; }
    .banner-arco::before { font-size: 6rem; top: 10px; }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.6rem; }
    .contacto-doble-tacna { flex-direction: column; }
}