/* ==========================================================
   THERVON — ESTILOS GENERALES
   ========================================================== */

:root {
    --negro: #000000;
    --gris-fondo: #111111;
    --blanco: #ffffff;
    --gris-texto: #a3a3a3;
    --gris-secundario: #9a9a9a;
    --gris-borde: #333333;
    --rojo: #ff3b3b;
    --rojo-acento: #ff3b1f;
    --naranja: #e8450a;
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-width: 0;
    overflow-x: hidden;
    color: var(--blanco);
    background-color: var(--negro);
    font-family: "Host Grotesk", sans-serif;
}

img,
svg {
    max-width: 100%;
}

img {
    height: auto;
}


/* ==========================================================
   HEADER
   ========================================================== */

header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;

    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;

    width: 100%;
    padding: 15px 10px 15px 50px;

    background: rgba(17, 17, 17, 0.6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);

    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.logo {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;

    line-height: 1.7;
    color: var(--blanco);
    padding: 0 20px;
}

.logo a {
    display: block;
}

.logo img {
    display: block;
    width: 175px;
    height: auto;
}

.logo img,
.brand img {
    display: block;
    width: 250px;
    max-width: 100%;
    height: auto;
}

.brand {
    width: fit-content;
    margin: 0 auto;
}


.nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 25px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav a {
    color: var(--blanco);
    font-size: 16px;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.nav a:last-child {
    color: var(--rojo);
    text-decoration: underline;
    text-underline-offset: 10px;
}


/* ==========================================================
   BOTÓN HAMBURGUESA
   ========================================================== */

.menu-toggle {
    display: none;

    padding: 5px;
    border: 0;
    background: transparent;

    color: var(--blanco);
    font-size: 30px;
    line-height: 1;
    cursor: pointer;
}


/* ==========================================================
   SECCIÓN HERO
   ========================================================== */

.seccion {
    min-height: 500px;
    padding: 170px 60px 60px;

    background-image: url("imagenes/fondo.jpeg");
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
}

.seccion article {
    width: 100%;
}


/* ==========================================================
   CONTENEDOR PRINCIPAL DE TEXTO
   ========================================================== */

.ppal {
    width: 100%;
    padding: 50px;
    background-color: var(--negro);
}

.comentario_inicio {
    display: block;

    margin: 0;
    padding-bottom: 120px;

    color: var(--rojo-acento);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    line-height: 1.2;
    text-transform: uppercase;
}

.prenda {
    display: block;

    margin: 0;
    padding-bottom: 0px;

    color: var(--gris-secundario);
    font-size: clamp(1rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: 1em;
    line-height: 1.2;
    text-transform: uppercase;
}

.titulo_grande {
    margin-top: 2.5rem;
    margin-bottom: 30px;

    font-size: clamp(2.5rem, 15vw, 15rem);
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 0.9;
    text-transform: uppercase;
}

.primera_frase {
    position: relative;

    margin: 0 0 45px;

    color: var(--blanco);
    font-family: "Host Grotesk", sans-serif;
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-optical-sizing: auto;
    font-style: normal;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1;
}

.primera_frase::after {
    content: "";

    display: inline-block;
    width: 0.25em;
    height: 0.25em;

    margin-left: 0.05em;

    border-radius: 50%;
    background-color: var(--rojo-acento);

    position: relative;
    top: 0.005em;
    vertical-align: baseline;
}

p {
    max-width: 1200px;
    margin: 0 0 45px;

    color: var(--gris-texto);
    font-size: clamp(0.9rem, 3vw, 2.2rem);
    font-weight: 600;
    line-height: 1.5;
}


/* ==========================================================
   BOTONES / ENLACES DE ACCIÓN
   ========================================================== */

.boton,
.manual_uso {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;

    height: 68px;
    padding: 0 42px;

    color: var(--rojo);
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-decoration: none;
    text-transform: uppercase;

    cursor: pointer;
    transition: color 0.3s ease, transform 0.3s ease;
}

.boton {
    border: 1px solid var(--rojo);
    margin-bottom: 50px;
}

.manual_uso {
    margin-top: 15px;
    margin-bottom: 0;
    border: 0;
    text-decoration: underline;
}

.boton:hover,
.manual_uso:hover {
    color: var(--blanco);
}

.boton span,
.manual_uso span {
    display: inline-block;

    font-size: 34px;
    line-height: 1;

    transition: transform 0.3s ease;
}

.boton:hover span,
.manual_uso:hover span {
    transform: translateX(8px);
}


/* ==========================================================
   SEPARADORES
   ========================================================== */

.separador_neon {
    display: block;

    width: 100%;
    height: 2px;
    margin: 50px 0;

    border: 0;
    background: linear-gradient(
        to right,
        transparent 0%,
        var(--rojo) 50%,
        transparent 100%
    );

    box-shadow: 0 0 15px rgba(255, 59, 59, 0.8);
}


/* ==========================================================
   TABLERO DE PRODUCTOS / FOTO + TEXTO
   ========================================================== */

.seccion_ajedrez {
    width: 100%;
    overflow: hidden;

    background-color: var(--negro);
}

.seccion_ajedrez .fila {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 40px;

    width: 100%;
    padding: 50px;
}

.seccion_ajedrez .foto,
.seccion_ajedrez .texto {
    min-width: 0;
    align-self: center;
    text-transform: uppercase;
}

.seccion_ajedrez .foto {
    display: flex;
    justify-content: center;
    align-items: center;
}

.seccion_ajedrez .foto img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 30px;
    object-fit: contain;
}

.seccion_ajedrez .texto {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.seccion_ajedrez h1 {
    margin-bottom: 10px;

    color: var(--blanco);
    font-family: "Archivo Black", sans-serif;
    font-size: clamp(2rem, 4vw, 4rem);
    line-height: 1.05;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.seccion_ajedrez .texto p {
    max-width: 700px;
    margin: 0;
    padding: 0;

    color: var(--gris-texto);
    font-size: clamp(1.1rem, 2.2vw, 2rem);
    line-height: 1.4;
}

.seccion_ajedrez .fila:nth-child(even) .foto {
    order: 2;
}

.seccion_ajedrez .fila:nth-child(even) .texto {
    order: 1;
}


/* ==========================================================
   CUADRADOS — NIVELES DE TEMPERATURA
   ========================================================== */

.contenedor-cuadrados {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;

    width: 100%;
    padding: 50px;

    background-color: var(--negro);
}

.cuadrado {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    min-width: 0;
    aspect-ratio: 1 / 1;
    padding: 20px;

    color: var(--blanco);
    background-color: var(--negro);

    text-align: center;
}

.cuadrado h3 {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;

    font-size: 40px;
    line-height: 1.1;
}

.cuadrado h3::before {
    content: "";

    display: inline-block;
    width: 220px;
    height: 10px;

    border-radius: 999px;
}

.cuadrado:nth-child(1) h3::before {
    background-color: #ffaa00;
}

.cuadrado:nth-child(2) h3::before {
    background-color: #ff7200;
}

.cuadrado:nth-child(3) h3::before {
    background-color: #ff3900;
}

.cuadrado:nth-child(4) h3::before {
    background-color: #ff0000;
}


.cuadrado p {
    width: 100%;
    max-width: none;
    margin-top: 20px;
    padding: 0;
    text-align: center;
    font-size: 32px;
    line-height: 1.3;
    color: #ffffff;
    white-space: nowrap;
}


/* ==========================================================
   CLAIM
   ========================================================== */

.claim {
    display: flex;
    justify-content: center;

    width: 100%;
    padding: 40px 20px;
}

.claim p {
    max-width: 1200px;
    margin: 0;

    color: var(--gris-texto);
    font-size: 1.2rem;
    line-height: 1.6;
    text-align: center;
}


/* ==========================================================
   CARACTERÍSTICAS
   ========================================================== */

.caracteristicas {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 40px;

    width: 100%;
    margin: 24px auto 0;
    padding: 0 30px;
}

.caracteristica-ind {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    min-width: 0;
}

.icono {
    width: 48px;
    height: 48px;
    color: var(--naranja);
}

.icono svg {
    display: block;
    width: 100%;
    height: 100%;
}

.titulo {
    color: var(--blanco);
    font-family: "Inter", sans-serif;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1.5px;
    line-height: 1.3;
    text-transform: uppercase;
}

.descripcion {
    color: var(--gris-secundario);
    font-size: 16px;
    line-height: 1.5;
}


/* ==========================================================
   BATERÍA
   ========================================================== */

.bateria {
    width: 100%;
}

.bateria .foto {
    display: flex;
    justify-content: center;
    align-items: center;
}

.bateria .foto img {
    display: block;
    width: 60%;
    height: auto;
    border-radius: 30px;
}


/* ==========================================================
   ESPECIFICACIONES
   ========================================================== */

.especificaciones_bateria {
    width: 100%;
}

.lista-niveles {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
    list-style: none;
}

.nivel-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;

    padding: 20px 30px;

    border-top: 1px solid var(--gris-borde);
}

.nivel-item:first-child {
    border-top: 0;
}

.texto-nivel {
    color: var(--gris-texto);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.5em;
    text-transform: uppercase;
}

.valor-extremo {
    color: var(--blanco);
    font-family: "Inter", sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-align: right;
}

.nota {
    max-width: 900px;
    margin: 20px auto;

    padding: 0 20px;

    color: #888888;
    font-size: 17px;
    line-height: 1.5;
}


/* ==========================================================
   GALERÍA
   ========================================================== */

.galeria_entornos {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px 20px;

    width: 100%;
    max-width: 1800px;
    margin: 0 auto;
    padding: 20px;
}

.tarjeta-foto {
    position: relative;
    overflow: hidden;

    border-radius: 8px;
}

.tarjeta-foto img {
    display: block;

    width: 100%;
    aspect-ratio: 3 / 2;

    border-radius: 8px;

    object-fit: cover;
}

.tarjeta-foto .texto-foto {
    position: absolute;
    left: 0;
    bottom: 0;

    width: 100%;
    padding: 12px 15px;

    color: var(--blanco);
    background: rgba(0, 0, 0, 0.45);

    font-size: clamp(0.9rem, 2vw, 2rem);
    font-weight: 600;
    text-align: center;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.8);
}


/* ==========================================================
   SERVICIOS
   ========================================================== */

.servicios {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;

    width: 100%;
    padding: 0 30px;
}

.servicio-item {
    display: flex;
    flex: 1 1 200px;
    flex-direction: column;
    gap: 15px;

    min-width: 0;
    padding-top: 20px;

    border-top: 1px solid var(--rojo);
}

.servicio-icono {
    width: 24px;
    height: 24px;
    color: var(--rojo-acento);
}

.servicio-etiqueta {
    color: var(--blanco);
    font-size: 1.3rem;
    font-weight: 700;
}


/* ==========================================================
   CONTACTO
   ========================================================== */

.contacto {
    width: 100%;
    padding: 0 30px;
}

.contacto_flex {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;

    width: 100%;
}

.contacto_item {
    display: flex;
    align-items: center;
    flex: 1 1 300px;
    min-width: 0;

    padding: 25px 0;
}

.contacto_icono {
    flex: 0 0 24px;

    width: 24px;
    height: 24px;
    margin-right: 20px;

    color: var(--rojo-acento);
    stroke-width: 2;
}

.info {
    min-width: 0;
    overflow-wrap: anywhere;
}


/* ==========================================================
   FOOTER
   ========================================================== */

footer {
    padding: 50px 20px;
    text-align: center;
}



/* ==========================================================
   RESPONSIVE — TABLET
   ========================================================== */

@media (max-width: 1024px) {

    header {
        padding: 12px 24px;
    }

    .logo {
        padding: 0 10px;
    }

    .logo img
    .brand img {
        width: 150px;
    }

    .nav {
        gap: 18px;
    }

    .nav-links {
        gap: 18px;
    }

    .nav a {
        font-size: 14px;
    }

    .seccion {
        padding: 150px 35px 50px;
    }

    .ppal {
        padding: 40px 35px;
    }

    .seccion_ajedrez .fila {
        gap: 30px;
        padding: 35px;
    }

    .contenedor-cuadrados {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 35px;
    }

    .cuadrado h3 {
        font-size: 32px;
    }

    .cuadrado h3::before {
        width: 170px;
    }

    .cuadrado p {
        font-size: 24px;
    }

    .caracteristicas {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 35px 25px;
        padding: 0 20px;
    }

    .galeria_entornos {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 20px;
    }

    .tarjeta-foto .texto-foto {
        font-size: 1.5rem;
    }

    .bateria .foto img {
        width: 100%;
    }
}


/* ==========================================================
   RESPONSIVE — MÓVIL / TABLET PEQUEÑA
   ========================================================== */

@media (max-width: 768px) {

    header {
        gap: 12px;
        padding: 10px 16px;
    }

    .logo {
        padding: 0;
    }

    .logo img 
    .brand img {
        width: 125px;
    }

    .nav {
        position: relative;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: calc(100% + 10px);
        right: 0;

        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;

        width: min(240px, calc(100vw - 32px));
        padding: 10px;

        background: rgba(17, 17, 17, 0.97);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 8px;

        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);

        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        display: block;
        padding: 15px 12px;
        font-size: 16px;
    }

    .nav-links a:hover {
        background: rgba(255, 59, 59, 0.1);
    }

    .nav-links a:last-child {
        text-underline-offset: 6px;
    }

    .seccion {
        min-height: 420px;
        padding: 125px 20px 40px;
    }

    .ppal {
        padding: 35px 20px;
    }

    .comentario_inicio {
        padding-bottom: 70px;
        font-size: 0.72rem;
        letter-spacing: 0.18em;
    }

    .titulo_grande {
        font-size: clamp(3rem, 18vw, 7rem);
        letter-spacing: -1px;
        line-height: 0.92;
    }

    .primera_frase {
        margin-bottom: 30px;
        font-size: clamp(2rem, 10vw, 4rem);
        line-height: 0.98;
    }

    p {
        margin-bottom: 30px;
        font-size: clamp(1rem, 4.5vw, 1.5rem);
    }

    .boton,
    .manual_uso {
        width: 100%;
        justify-content: space-between;
        gap: 20px;

        height: 58px;
        padding: 0 20px;

        font-size: 12px;
        letter-spacing: 0.12em;
    }

    .boton {
        margin-bottom: 30px;
    }

    .manual_uso {
        margin-top: 15px;
        height: 50px;
    }

    .boton span,
    .manual_uso span {
        font-size: 28px;
    }

    .separador_neon {
        margin: 35px 0;
    }

    /* A partir de aquí se pasa a una sola columna.
       Esto mantiene la imagen y el texto legibles en móvil. */
    .seccion_ajedrez .fila {
        grid-template-columns: minmax(0, 1fr);
        gap: 25px;
        padding: 25px 20px;
    }

    .seccion_ajedrez .fila:nth-child(even) .foto,
    .seccion_ajedrez .fila:nth-child(even) .texto {
        order: initial;
    }

    .seccion_ajedrez .texto {
        align-self: center;
        text-align: left;
    }

    .seccion_ajedrez .foto img {
        width: 100%;
    }

    .seccion_ajedrez h1 {
        font-size: clamp(2rem, 9vw, 3.5rem);
    }

    .seccion_ajedrez .texto p {
        font-size: clamp(1rem, 4.5vw, 1.5rem);
    }

    .contenedor-cuadrados {
        grid-template-columns: minmax(0, 1fr);
        gap: 15px;
        padding: 25px 20px;
    }

    .cuadrado {
        aspect-ratio: auto;
        min-height: 300px;
        padding: 30px 20px;
    }

    .cuadrado h3 {
        font-size: 28px;
    }

    .cuadrado h3::before {
        width: min(180px, 70vw);
    }

    .cuadrado p {
        margin-top: 15px;
        padding: 0 10px;
        font-size: 19px;
    }

    .claim {
        padding: 30px 20px;
    }

    .claim p {
        font-size: 1rem;
        line-height: 1.5;
    }

    .caracteristicas {
        grid-template-columns: minmax(0, 1fr);
        gap: 30px;
        padding: 0 20px;
    }

    .titulo {
        font-size: 18px;
    }

    .descripcion {
        font-size: 15px;
    }

    .bateria .foto img {
        width: 100%;
        border-radius: 20px;
    }

    .nivel-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 18px 20px;
    }

    .texto-nivel {
        font-size: 0.65rem;
        letter-spacing: 0.25em;
    }

    .valor-extremo {
        font-size: 1.2rem;
        text-align: left;
    }

    .nota {
        padding: 0 20px;
        font-size: 15px;
    }

    .galeria_entornos {
        grid-template-columns: minmax(0, 1fr);
        gap: 15px;
        padding: 20px;
    }

    .tarjeta-foto .texto-foto {
        padding: 10px 12px;
        font-size: 1.25rem;
    }

    .servicios {
        flex-direction: column;
        gap: 25px;
        padding: 0 20px;
    }

    .servicio-item {
        flex: 1 1 auto;
    }

    .servicio-etiqueta {
        font-size: 1.1rem;
    }

    .contacto {
        padding: 0 20px;
    }

    .contacto_flex {
        flex-direction: column;
        gap: 0;
    }

    .contacto_item {
        flex: 1 1 auto;
        width: 100%;
        padding: 20px 0;
    }

    footer {
        padding: 35px 20px;
    }

    .brand img {
        max-width: 240px;
    }
}


/* ==========================================================
   RESPONSIVE — MÓVILES PEQUEÑOS
   ========================================================== */

@media (max-width: 480px) {

    header {
        padding: 9px 12px;
    }

    .logo img
    .brand img {
        width: 105px;
    }

    .seccion {
        padding: 110px 16px 30px;
    }

    .ppal {
        padding: 30px 16px;
    }

    .comentario_inicio {
        padding-bottom: 50px;
        font-size: 0.65rem;
    }

    .titulo_grande {
        font-size: clamp(2.6rem, 19vw, 5.5rem);
    }

    .primera_frase {
        font-size: clamp(1.8rem, 10vw, 3rem);
    }

    .boton,
    .manual_uso {
        font-size: 10px;
        letter-spacing: 0.08em;
        padding: 0 15px;
    }

    .seccion_ajedrez .fila {
        padding: 20px 16px;
    }

    .contenedor-cuadrados {
        padding: 20px 16px;
    }

    .cuadrado {
        min-height: 260px;
    }

    .caracteristicas {
        padding: 0 16px;
    }

    .galeria_entornos {
        padding: 16px;
    }

    .nivel-item {
        padding: 16px;
    }

    .contacto,
    .servicios {
        padding-left: 16px;
        padding-right: 16px;
    }
}