/* ============================================================
   Club de Espeleo Tritón - Hoja de estilos principal
   ============================================================ */

:root {
    --bg-dark: #000000;
    --bg-elevated: #141414;
    --bg-input: #1a1a1a;
    --border-subtle: #262626;
    --text-light: #f8f9fa;
    --text-muted: #9a9a9a;
    --accent-color: #00d2ff;
    --accent-color-soft: rgba(0, 210, 255, 0.15);
    --nav-height: 76px;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: "Epunda Sans", sans-serif;
    overflow-x: hidden;
}

/* Ancla las secciones para que el navbar fijo no las tape al hacer scroll a un enlace */
#quienes-somos,
#contacto {
    scroll-margin-top: var(--nav-height);
}

::selection {
    background-color: var(--accent-color);
    color: #04121a;
}

/* Scrollbar a juego con el tema oscuro (navegadores WebKit) */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background-color: #2a2a2a;
    border-radius: 6px;
    border: 2px solid var(--bg-dark);
}

::-webkit-scrollbar-thumb:hover {
    background-color: #3a3a3a;
}

.tracking-wider {
    letter-spacing: 0.08em;
}

/* ============================================================
   Navbar
   ============================================================ */
.navbar {
    background-color: rgba(10, 10, 10, 0.75) !important;
    backdrop-filter: blur(8px);
    border-bottom: 1px solid transparent;
    min-height: var(--nav-height);
    transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.navbar.navbar-scrolled {
    background-color: rgba(10, 10, 10, 0.95) !important;
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.navbar-brand span {
    letter-spacing: 0.12em;
    font-size: 1rem;
}

.navbar .nav-link {
    position: relative;
    font-size: 0.85rem;
    color: #d0d0d0 !important;
    padding-block: 0.6rem;
}

.navbar .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0.35rem;
    height: 2px;
    background: var(--accent-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.25s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    color: #ffffff !important;
}

.navbar .nav-link:hover::after,
.navbar .nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
    height: 100vh;
    height: 100dvh;
    background: linear-gradient(rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 1)),
        url('../img/pexels-deniz-ozgur-1289155-6056732.jpg') no-repeat center center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
}

.hero h1 {
    text-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
    letter-spacing: 0.02em;
}

.hero .lead {
    max-width: 640px;
    margin-inline: auto;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
}

.hero .btn {
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.hero .btn:hover {
    background-color: var(--text-light);
    color: #05080a;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.hero-scroll-cue {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-muted);
    font-size: 1.5rem;
    animation: bounce-cue 2.2s ease-in-out infinite;
}

@keyframes bounce-cue {

    0%,
    100% {
        transform: translate(-50%, 0);
        opacity: 0.5;
    }

    50% {
        transform: translate(-50%, 8px);
        opacity: 1;
    }
}

/* ============================================================
   Separador panorámico
   ============================================================ */
.separator-img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    display: block;
    filter: brightness(0.75);
}

/* ============================================================
   Secciones de contenido / imágenes
   ============================================================ */
.content-section {
    padding: 80px 0;
}

.content-section a {
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.5s ease;
}

.content-section a:hover {
    color: var(--accent-color);
}

.img-vertical,
.img-artistic {
    display: block;
    border-radius: 10px;
    object-fit: cover;
    transition: transform 0.5s ease, filter 0.5s ease;
}

.img-vertical {
    width: 100%;
    height: 100%;
    max-height: 600px;
}

.img-artistic {
    width: 100%;
}

.img-vertical:hover,
.img-artistic:hover {
    transform: scale(1.02);
    filter: brightness(1.05);
}

.badge-reg {
    background-color: #1c1c1c;
    color: var(--text-muted);
    border: 1px solid var(--border-subtle);
    border-radius: 50px;
    font-size: 0.7rem;
    letter-spacing: 0.06em;
}

/* Revelado suave de contenido al hacer scroll */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.reveal-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {

    html {
        scroll-behavior: auto;
    }

    .reveal,
    .hero-scroll-cue,
    .img-vertical,
    .img-artistic {
        transition: none !important;
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ============================================================
   Formulario de contacto
   ============================================================ */
.form-card {
    background-color: var(--bg-elevated) !important;
}

.top-line-accent {
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), transparent 80%);
}

.form-control,
.custom-input {
    background-color: var(--bg-input);
    border: 1px solid #2e2e2e;
    color: #fff;
}

.form-control:focus {
    background-color: #202020;
    border-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 0 0 0.2rem var(--accent-color-soft);
}

/* Etiquetas flotantes legibles sobre fondo oscuro */
.form-floating>label {
    color: var(--text-muted);
}

.form-floating>.form-control:focus~label,
.form-floating>.form-control:not(:placeholder-shown)~label {
    color: var(--accent-color);
    opacity: 1;
}

.form-floating>.form-control:focus,
.form-floating>.form-control:not(:placeholder-shown) {
    padding-top: 1.625rem;
    padding-bottom: 0.625rem;
}

.custom-checkbox {
    background-color: var(--bg-input);
    border: 1px solid #444;
}

.custom-checkbox:checked {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.custom-checkbox:focus {
    box-shadow: 0 0 0 0.2rem var(--accent-color-soft);
}

.btn-accent {
    background-color: var(--accent-color);
    border: 1px solid var(--accent-color);
    color: #04141a;
    letter-spacing: 0.06em;
    transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-accent:hover {
    background-color: #33ddff;
    border-color: #33ddff;
    color: #04141a;
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(0, 210, 255, 0.25);
}

.btn-accent:active {
    transform: translateY(0);
}

/* ============================================================
   Breadcrumbs (páginas internas)
   ============================================================ */
.breadcrumb {
    --bs-breadcrumb-divider-color: #555;
    --bs-breadcrumb-item-active-color: var(--text-light);
}

.breadcrumb-item a {
    color: var(--text-muted);
}

.breadcrumb-item a:hover {
    color: var(--text-light);
}

/* ============================================================
   Acordeón FAQ (Bootstrap por defecto asume fondo claro)
   ============================================================ */
.custom-accordion .accordion-button {
    box-shadow: none !important;
}

.custom-accordion .accordion-button:not(.collapsed) {
    color: var(--accent-color) !important;
    background-color: rgba(0, 210, 255, 0.06) !important;
}

.custom-accordion .accordion-button::after {
    filter: invert(1) brightness(1.6);
}

.custom-accordion .accordion-button:focus {
    box-shadow: none;
}

/* ============================================================
   Footer
   ============================================================ */
footer {
    background-color: var(--bg-elevated);
    border-top: 1px solid var(--border-subtle);
}

.footer-links a {
    transition: color 0.2s ease-in-out;
}

.footer-links a:hover {
    color: #ffffff !important;
}