/* ==========================================================================
   RESET & BASE
   ========================================================================== */

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

@font-face {
    font-family: 'HK Grotesk';
    src: url('../fonts/HKGrotesk-Light.woff2') format('woff2');
    font-weight: 300;
    font-display: swap;
}

@font-face {
    font-family: 'HK Grotesk';
    src: url('../fonts/HKGrotesk-Regular.woff2') format('woff2');
    font-weight: 400;
    font-display: swap;
}

@font-face {
    font-family: 'HK Grotesk';
    src: url('../fonts/HKGrotesk-Bold.woff2') format('woff2');
    font-weight: 700;
    font-display: swap;
}

html, body {
    width: 100%;
    height: 100%;
}

body {
    font-family: 'HK Grotesk', -apple-system, sans-serif;
    font-weight: 400;
    color: #212121;
    background: #fafafa;
    text-transform: lowercase;
    overflow-x: hidden;
    overflow-y: auto;
}

body.no-scroll {
    overflow-y: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    background: none;
    border: none;
    color: #212121;
    text-transform: lowercase;
    touch-action: manipulation;
    -webkit-appearance: none;
    appearance: none;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

/* ==========================================================================
   CURSOR PERSONALIZADO
   Solo se muestra en dispositivos con mouse real (desktop).
   En mobile/touch se restaura el cursor nativo automáticamente.

   Técnica: posicionamiento via left/top + margin negativo.
   - NO se usa transition en el movimiento → rAF lo maneja solo, sin conflicto.
   - NO se usa transform/calc() → compatibilidad máxima en todos los browsers.
   - cursor: none con !important y scope específico (hover + pointer: fine).
   ========================================================================== */

/* Ocultar cursor nativo solo en desktop con mouse */
html {
    cursor: none !important;
}

@media (hover: hover) and (pointer: fine) {
    * {
        cursor: none !important;
    }
}

/* Círculo del cursor */
.cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 16px;
    height: 16px;
    background: transparent;
    border: 2px solid #212121;
    border-radius: 50%;
    pointer-events: none;
    z-index: 99999;
    opacity: 0;
    /* Centrar el círculo: -8px = -50% de 16px */
    margin-left: -8px;
    margin-top:  -8px;
    /*
     * transform se usa SOLO para el scale del hover, no para el movimiento.
     * El movimiento sigue siendo left/top vía rAF — sin conflicto.
     * cubic-bezier(0.34, 1.56, 0.64, 1) = spring suave con leve rebote.
     */
    transform: scale(1);
    transition:
        opacity   0.2s ease,
        transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: left, top, transform;
}

.cursor.visible {
    opacity: 1;
}

/* Estado hover: 150% del tamaño original (16px → 24px) */
.cursor.is-hovering {
    transform: scale(1.5);
}

/* En dispositivos táctiles o sin mouse: restituir cursor nativo */
@media (hover: none), (pointer: coarse) {
    html,
    * {
        cursor: auto !important;
    }

    .cursor {
        display: none !important;
    }
}

/* ==========================================================================
   OVERLAY IMAGEN RANDOM (hover en tagline)
   Se posiciona entre el nav-frame (1000) y el contenido de secciones/proyectos.
   ========================================================================== */

.random-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 900; /* Por debajo del nav (1000) pero sobre todo lo demás */
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0s 0.3s;
}

.random-overlay.visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0s;
}

.random-overlay img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* ==========================================================================
   NAVIGATION FRAME
   ========================================================================== */

.nav-frame {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    pointer-events: none;
    z-index: 1000;
}

.nav-frame > * {
    pointer-events: auto;
}

.nav-frame__logo {
    position: absolute;
    top: 2rem;
    left: 2rem;
}

.logo-link {
    display: block;
    line-height: 0;
}

.logo-svg {
    height: 3rem;
    width: auto;
    display: block;
}

.nav-frame__menu-top {
    position: absolute;
    top: 2rem;
    right: 2rem;
}

.nav-frame__tagline {
    position: absolute;
    bottom: 2rem;
    left: 2rem;
}

.tagline {
    font-size: 1rem;
    transition: opacity 0.3s ease;
}

.nav-frame__menu-bottom {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
}

.menu-list {
    display: flex;
    gap: 1.5rem;
}

.menu-link {
    font-size: 1rem;
    transition: opacity 0.3s ease;
}

.menu-link:hover {
    opacity: 0.5;
}

.close-btn {
    position: absolute;
    top: 50%;
    right: 2rem;
    transform: translateY(-50%);
    writing-mode: vertical-lr;
    font-size: 1.6rem;
    color: #212121;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0s 0.3s;
    touch-action: manipulation;
}

.close-btn.visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0s;
}

.close-btn:hover {
    opacity: 0.5;
}

/* ==========================================================================
   MAIN CONTENT
   ========================================================================== */

.main-content {
    width: 100%;
    height: 100vh;
    position: relative;
}

/* ==========================================================================
   SECCIONES DEL MENÚ (concepto, ejecución, lab)
   Abren como overlays de pantalla completa, scrolleables.
   ========================================================================== */

.section {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    opacity: 0;
    visibility: hidden;
    background: #fafafa;
    overflow-y: auto;
    z-index: 300; /* Por encima del slider (50/100) y proyectos (200) */
    transition: opacity 0.5s ease, visibility 0s 0.5s;
}

.section.active {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease, visibility 0s;
}

/* Layout interno de sección */
.section__content {
    width: 70vw;
    margin: 0 auto;
    padding: 12vh 0 8rem;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: start;
}

.section__intro h1 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.section__subtitle {
    font-size: 1rem;
    color: #666;
    font-weight: 400;
}

.section__body p {
    font-size: 1rem;
    line-height: 1.6;
    color: #212121;
    text-transform: none;
    margin-bottom: 1.5rem;
    max-width: 60ch;
}

/* Servicios dentro de ejecución */
.section__service {
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid #e0e0e0;
}

.section__service:last-child {
    border-bottom: none;
}

.section__service h2 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section__service p {
    font-size: 1rem;
    line-height: 1.6;
    color: #212121;
    text-transform: none;
    margin-bottom: 0.75rem;
    max-width: 60ch;
}

/* ==========================================================================
   HOME — SLIDER
   ========================================================================== */

.home {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
}

.home.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.5s ease, visibility 0s 0.5s;
}

/* Slides internos (solo almacenan datos) */
.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Info lateral izquierda */
.slide__info {
    position: absolute;
    left: 2rem;
    top: 50%;
    writing-mode: vertical-lr;
    transform: translateY(-50%) rotate(180deg);
    font-size: 1.6rem;
    font-weight: 400;
    white-space: nowrap;
    transition: opacity 0.4s ease;
    z-index: 60;
    pointer-events: none;
}

.slide__info.hidden {
    opacity: 0 !important;
    pointer-events: none;
}

.slide__info strong {
    font-weight: 700;
}

/* ==========================================================================
   NAVEGACIÓN ANTERIOR / SIGUIENTE
   Reemplaza al contador numérico.
   Mismo hover que los links del nav (opacity 0.5).
   ========================================================================== */

.slide__nav {
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: flex-end;
    z-index: 60;
}

.slide__nav.hidden {
    opacity: 0 !important;
    pointer-events: none;
}

.slide__nav__btn {
    writing-mode: vertical-rl;
    font-size: 1.6rem;
    font-weight: 400;
    transition: opacity 0.3s ease;
    touch-action: manipulation;
}

.slide__nav__btn:hover {
    opacity: 0.5;
}

/* ==========================================================================
   IMAGEN DEL SLIDER
   
   Sistema de posicionamiento:
   - Siempre: position fixed, left: 50%
   - Centrado: transform translate(-50%, -50%) con top: 50%
   - Expandido: transform translateX(-50%) con top: 0
   
   NUNCA se modifica `left`. Solo cambian top, width, height y la parte Y
   del transform. Garantiza animación vertical sin desplazamiento horizontal.
   ========================================================================== */

.slide__image {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 28vw;
    height: 76vh;
    overflow: hidden;
    z-index: 100;
    touch-action: manipulation;
    transition:
        width     1s cubic-bezier(0.16, 1, 0.3, 1),
        height    1s cubic-bezier(0.16, 1, 0.3, 1),
        top       1s cubic-bezier(0.16, 1, 0.3, 1),
        transform 1s cubic-bezier(0.16, 1, 0.3, 1),
        opacity   0.1s ease;
}

.slide__image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: opacity 0.4s ease; /* debe coincidir con CONFIG.fadeDuration en scripts.js */
}

.slide__image.expanding {
    top: 0;
    transform: translateX(-50%);
    width: 85vw;
    height: 76vh;
}

.slide__image.fade-out {
    opacity: 0;
    pointer-events: none;
}

/* ==========================================================================
   PROJECT VIEW (Contenido scrolleable)
   ========================================================================== */

.project {
    position: relative;
    opacity: 0;
    visibility: hidden;
    min-height: 100vh;
    background: #fafafa;
    transition: opacity 0.5s ease, visibility 0s 0.5s;
    z-index: 1;
}

.project.active {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease, visibility 0s;
    z-index: 200;
}

.project__hero {
    width: 85vw;
    height: 76vh;
    margin: 0 auto;
    opacity: 0;
    transition: opacity 0.1s ease;
}

.project__hero.visible {
    opacity: 1;
}

.project__hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.project__content {
    width: 70vw;
    margin: 0 auto;
    padding: 4rem 0 8rem;
}

.project__intro {
    text-align: left;
    margin-bottom: 4rem;
}

.project__intro h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.project__intro h2,
.project__intro h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.project__intro .subtitle {
    font-size: 1.4rem;
    color: #666;
    font-weight: 400;
}

/* Párrafos de cuerpo de texto — clase independiente de .subtitle */
.project__body {
    font-size: 1.2rem;
    color: #666;
    font-weight: 400;
    line-height: 1.5;
    text-transform: none;
}

.project__intro .link {
    font-size: 1.2rem;
    color: #212121;
    text-decoration: underline;
    text-underline-offset: 3px;
    text-transform: none;
    display: inline-block;
    transition: opacity 0.3s ease;
}

.project__intro .link:hover {
    opacity: 0.5;
}

.project__full {
    margin-bottom: 4rem;
}

.project__full img {
    width: 100%;
    height: auto;
}

.project__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin-bottom: 4rem;
    align-items: start;
}

.project__grid--reverse {
    direction: rtl;
}

.project__grid--reverse > * {
    direction: ltr;
}

.project__grid-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 4rem;
}

.project__text h2 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.project__text h3 {
    font-size: 1rem;
    font-weight: 700;
    margin: 2rem 0 0.5rem;
}

.project__text p {
    font-size: 0.9rem;
    line-height: 1.4;
    margin-bottom: 0.5rem;
    text-transform: none;
}

.project__text ul {
    list-style: none;
    padding-left: 0;
}

.project__text ul li {
    font-size: 0.9rem;
    line-height: 1.4;
    margin-bottom: 0.5rem;
    text-transform: none;
}

.project__image img {
    width: 100%;
    height: auto;
}

/* ==========================================================================
   RESPONSIVE — Mobile (max-width: 768px)
   ========================================================================== */

@media (max-width: 768px) {

    /* Nav */
    .nav-frame__logo,
    .nav-frame__menu-top,
    .nav-frame__tagline,
    .nav-frame__menu-bottom {
        font-size: 0.875rem;
    }

    .nav-frame__logo,
    .nav-frame__tagline {
        left: 1rem;
    }

    .nav-frame__menu-top,
    .nav-frame__menu-bottom,
    .close-btn {
        right: 1rem;
    }

    .close-btn {
        font-size: 1.2rem;
    }

    .nav-frame__logo     { top: 1rem; }
    .nav-frame__menu-top { top: 1rem; }
    .nav-frame__tagline  { bottom: 1rem; }
    .nav-frame__menu-bottom { bottom: 1rem; }

    .menu-list { gap: 1rem; }

    /* Slider */
    .slide__info    { left: 1rem; font-size: 1.2rem; }
    .slide__nav     { right: 1rem; }
    .slide__nav__btn { font-size: 1.2rem; }

    .slide__image {
        width: 75vw;
        height: 65vh;
    }

    .slide__image.expanding {
        top: 0;
        transform: translateX(-50%);
        width: 100vw;
        height: 70vh;
    }

    .project__hero {
        width: 100vw;
        height: 70vh;
        margin: 0;
    }

    .project__content {
        width: 88vw;
    }

    .project__intro h1 {
        font-size: 3rem;
    }

    .project__intro .subtitle {
        font-size: 1.6rem;
    }

    .project__body {
        font-size: 1rem;
        line-height: 1.2;
    }

    .project__grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .project__grid--reverse {
        direction: ltr;
    }

    .project__grid-3col {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .project__text h2 {
        font-size: 1.25rem;
    }

    /* Secciones */
    .section__content {
        width: 70vw;
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 15vh 0 6rem;
    }

    .section__body p,
    .section__service p {
        font-size: 0.95rem;
    }
}