/* ===== BGS Group ===== */

:root {
    --primary-red: #e63946;
    --accent-yellow: #f1c40f;
    --bg-black: #0f0f0f;
    --bg-card: #1a1a1a;
    --text-light: #dcdcdc;
    --text-white: #ffffff;
    --border-color: #333;
    --gradient-red: linear-gradient(135deg, #e63946, #c62828);
    --gradient-yellow: linear-gradient(135deg, #f1c40f, #e6c200);
    --shadow-red: 0 8px 25px rgba(230, 57, 70, 0.3);
    --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', system-ui, -apple-system, 'Segoe UI', sans-serif;
    background: var(--bg-black);
    color: var(--text-light);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

main {
    flex: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.skip-link {
    position: absolute;
    top: 8px;
    left: 8px;
    transform: translateY(-200%);
    background: var(--primary-red);
    color: var(--text-white);
    padding: 8px 12px;
    border-radius: 4px;
    text-decoration: none;
    z-index: 2000;
}

.skip-link:focus {
    transform: none;
}

:focus-visible {
    outline: 2px solid var(--accent-yellow);
    outline-offset: 3px;
}

/* ===== FONDO DE CIRCUITO (lo crea circuit-bg.js) ===== */
.circuit-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    height: 100lvh;
    z-index: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1.2s ease;
}

.circuit-bg.ready {
    opacity: 1;
}

main,
.footer {
    position: relative;
    z-index: 1;
}

/* ===== HEADER ===== */
.header {
    position: sticky;
    top: 0;
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.header.is-scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.header.is-hidden {
    transform: translateY(-100%);
}

.header-inner {
    display: flex;
    align-items: center;
    min-height: 72px;
}

.logo {
    text-decoration: none;
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient-red);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Acceso al correo de la empresa (mail.bgs50.com). Contorno para no competir con los
   botones de las tarjetas; al pasar el mouse se llena con el rojo de la marca. */
.header-mail {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 44px;
    padding: 0.55rem 1.2rem;
    border: 1px solid rgba(230, 57, 70, 0.7);
    border-radius: 25px;
    color: var(--text-white);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.header-mail:hover,
.header-mail:focus-visible {
    background: var(--gradient-red);
    border-color: transparent;
    box-shadow: var(--shadow-red);
}

.icon-mail {
    width: 18px;
    height: 18px;
    fill: currentColor;
    flex-shrink: 0;
}

/* ===== COMPANIES ===== */
.companies {
    padding: 5rem 0 6rem;
}

.companies-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2.5rem;
}

.company-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
}

.company-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgba(230, 57, 70, 0.1), transparent 55%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.company-card:hover,
.company-card:focus-within,
.company-card.energized {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(230, 57, 70, 0.25);
    border-color: transparent;
}

.company-card:hover::before,
.company-card:focus-within::before,
.company-card.energized::before {
    opacity: 1;
}

/* Corriente por el borde: un degradado cónico que gira, recortado con una
   máscara para que solo se vea un anillo de 2px. En pausa fuera del hover,
   así al salir se apaga en su lugar en vez de saltar al inicio. */
@property --current-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

.company-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 15px;
    padding: 2px;
    background: conic-gradient(from var(--current-angle),
        transparent 0deg 240deg,
        rgba(230, 57, 70, 0.5) 290deg,
        #e63946 330deg,
        #f1c40f 352deg,
        transparent 360deg);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
    animation: current-run 1.6s linear infinite paused;
    pointer-events: none;
    z-index: 2;
}

.company-card:hover::after,
.company-card:focus-within::after,
.company-card.energized::after {
    opacity: 1;
    animation-play-state: running;
}

@keyframes current-run {
    to {
        --current-angle: 360deg;
    }
}

/* Los logos vienen con y sin fondo blanco: un panel blanco los unifica y
   object-fit: contain evita que se recorten. */
.logo-panel {
    position: relative;
    height: 230px;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.75rem;
    overflow: hidden;
}

/* Resplandor cálido detrás del logo al energizarse. */
.logo-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 55%,
        rgba(241, 196, 15, 0.22) 0%,
        rgba(230, 57, 70, 0.12) 40%,
        transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

/* multiply vuelve "transparente" el fondo blanco de algunos logos, así el
   resplandor se ve parejo detrás de todos. */
.company-logo {
    position: relative;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    mix-blend-mode: multiply;
    transition: transform 0.5s var(--ease);
}

.company-card:hover .logo-panel::before,
.company-card:focus-within .logo-panel::before,
.company-card.energized .logo-panel::before {
    opacity: 1;
}

.company-card:hover .company-logo,
.company-card:focus-within .company-logo,
.company-card.energized .company-logo {
    transform: translateY(-4px) scale(1.06);
}
.card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem 1.5rem 1.75rem;
}

.company-name {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--primary-red);
    margin-bottom: 0.4rem;
}

.company-description {
    font-size: 0.92rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
    flex: 1;
}

.visit-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gradient-red);
    color: var(--text-white);
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    font-weight: 500;
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
    isolation: isolate;
    box-shadow: var(--shadow-red);
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.visit-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-yellow);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.visit-button:hover,
.visit-button:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(241, 196, 15, 0.3);
    color: #1a1a1a;
}

.visit-button:hover::before,
.visit-button:focus-visible::before {
    opacity: 1;
}

.icon-external {
    width: 16px;
    height: 16px;
    fill: currentColor;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.visit-button:hover .icon-external {
    transform: translate(2px, -2px);
}

/* Aparición al hacer scroll (la clase la pone main.js; sin JS todo se ve). */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.visible {
    opacity: 1;
    transform: none;
}

/* ===== 404 ===== */
.not-found {
    display: flex;
    align-items: center;
    text-align: center;
    padding: 6rem 0;
}

.not-found .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.not-found-code {
    font-size: 6rem;
    font-weight: 700;
    line-height: 1;
    background: var(--gradient-red);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.not-found h1 {
    color: var(--text-white);
    font-size: 2rem;
}

.not-found p:not(.not-found-code) {
    margin-bottom: 1rem;
}

/* ===== FOOTER ===== */
.footer {
    background: #0a0a0a;
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.footer .logo-text {
    font-size: 1.5rem;
}

.footer p {
    font-size: 0.9rem;
}

/* ===== SCROLL TO TOP ===== */
.scroll-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: var(--gradient-red);
    color: var(--text-white);
    box-shadow: var(--shadow-red);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateY(120px);
    transition: transform 0.3s ease, background 0.3s ease;
    z-index: 1000;
}

.scroll-to-top.visible {
    transform: none;
}

.scroll-to-top:hover {
    background: var(--gradient-yellow);
    color: #1a1a1a;
}

.scroll-to-top svg {
    width: 22px;
    height: 22px;
    fill: currentColor;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-black);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-red);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-yellow);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .companies-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 2rem;
    }
}

@media (max-width: 640px) {
    .header-inner {
        min-height: 60px;
    }

    .logo-text {
        font-size: 1.5rem;
    }

    .companies {
        padding: 2.5rem 0 4rem;
    }

    .companies-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 1.5rem;
    }

    .logo-panel {
        height: 190px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .not-found-code {
        font-size: 4.5rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }

    .company-card:hover,
    .company-card:focus-within {
        transform: none;
    }

    .company-card::after {
        animation: none !important;
        background: linear-gradient(135deg, #e63946, #f1c40f);
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}