/* ============================================================
       TABLA DE CONTENIDOS — CSS (proyecto.html)
       1.  Variables (mismas que index.html)
       2.  Reset y base
       3.  Navbar
       4.  Botón volver
       5.  Hero del proyecto
       6.  Sección de información
       7.  Sección de galería (spread catálogo)
       8.  CTA solicitar
       9.  Footer
       10. Estado de error (id inválido)
       11. Responsive
    ============================================================ */


    /* ─── 1. VARIABLES ── Mismas que index.html ─────────────── */
    :root {
      --cream:      #F2EDE0;
      --cream-dark: #E5DDD0;
      --gold:       #B89B5E;
      --gold-light: #D4B97A;
      --dark:       #1C1C1C;
      --dark-mid:   #2A2A2A;
      --charcoal:   #3D3D3D;
      --text-body:  #4A4545;
      --text-muted: #8A8075;
      --white:      #FFFFFF;

      --font-serif: 'Playfair Display', Georgia, serif;
      --font-sans:  'Inter', system-ui, sans-serif;

      --t-fast:      0.18s ease-out;
      --t-base:      0.26s ease-out;
      --ease-out:    cubic-bezier(0.23, 1, 0.32, 1);
      --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
    }


    /* ─── 2. RESET Y BASE ────────────────────────────────────── */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: var(--font-sans);
      background: var(--cream);
      color: var(--text-body);
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    img  { display: block; max-width: 100%; height: auto; }
    a    { text-decoration: none; color: inherit; }
    ul   { list-style: none; padding: 0; margin: 0; }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 40px;
    }


    /* ─── 3. NAVBAR ─── compacta en página de detalle ──────── */
    .navbar {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 1000;
      padding: 14px 0;
      background: var(--white);
      box-shadow: 0 1px 24px rgba(0,0,0,0.08);
    }

    .navbar__inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .navbar__logo img { height: 52px; width: auto; }

    .navbar__links {
      display: flex;
      align-items: center;
      gap: 36px;
    }

    .navbar__links a {
      font-size: 12px;
      font-weight: 500;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--charcoal);
      position: relative;
      transition: color var(--t-fast);
    }
    .navbar__links a::after {
      content: '';
      position: absolute;
      bottom: -4px; left: 0;
      width: 0; height: 1.5px;
      background: var(--gold);
      transition: width var(--t-base);
    }
    .navbar__links a:hover { color: var(--dark); }
    .navbar__links a:hover::after { width: 100%; }

    /* Hamburger (móvil) */
    .navbar__burger {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 34px; height: 34px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .navbar__burger span {
      display: block;
      height: 1.5px;
      background: var(--dark);
      transition: transform var(--t-base), opacity var(--t-fast);
      transform-origin: center;
    }
    .navbar__burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
    .navbar__burger.open span:nth-child(2) { opacity: 0; }
    .navbar__burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

    /* Menú overlay móvil */
    .navbar__mobile {
      position: fixed;
      top: 0; left: 0; right: 0; bottom: 0;
      background: var(--dark);
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 36px;
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
      transition: opacity 0.32s var(--ease-out), visibility 0.32s;
    }
    .navbar__mobile.open { opacity: 1; visibility: visible; pointer-events: all; }
    .navbar__mobile a {
      font-family: var(--font-serif);
      font-style: italic;
      font-size: 2rem;
      color: var(--white);
      opacity: 0;
      transform: translateY(18px);
      transition: color var(--t-fast), opacity 0.38s var(--ease-out), transform 0.38s var(--ease-out);
    }
    .navbar__mobile.open a { opacity: 1; transform: translateY(0); }
    .navbar__mobile.open a:nth-child(1) { transition-delay: 0.06s; }
    .navbar__mobile.open a:nth-child(2) { transition-delay: 0.12s; }
    .navbar__mobile.open a:nth-child(3) { transition-delay: 0.18s; }
    .navbar__mobile.open a:nth-child(4) { transition-delay: 0.24s; }
    .navbar__mobile.open a:nth-child(5) { transition-delay: 0.30s; }
    .navbar__mobile a:hover { color: var(--gold); }


    /* ─── 4. BOTÓN VOLVER ────────────────────────────────────── */
    /* Aparece justo debajo de la navbar, sobre el hero.
       Siempre apunta a index.html#proyectos. */
    .btn-back {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-sans);
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--white);
      padding: 12px 20px;
      background: rgba(28,28,28,0.55);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255,255,255,0.2);
      position: absolute;
      top: 20px;
      left: 40px;
      z-index: 10;
      transition: background var(--t-fast), border-color var(--t-fast), transform 160ms ease-out;
      animation: detailFadeIn 0.6s var(--ease-out) 0.1s both;
    }
    .btn-back:hover  { background: rgba(184,155,94,0.75); border-color: transparent; }
    .btn-back:active { transform: scale(0.97); }
    .btn-back svg { flex-shrink: 0; }


    /* ─── 5. HERO DEL PROYECTO ───────────────────────────────── */
    /* Imagen principal a pantalla completa con overlay gradiente. */
    .detail-hero {
      position: relative;
      height: 82vh;
      min-height: 480px;
      overflow: hidden;
      margin-top: 80px; /* offset de la navbar compacta (52px logo + 28px padding) */
    }

    .detail-hero__img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: center;
    }

    .detail-hero__overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(
        to top,
        rgba(10,10,10,0.75) 0%,
        rgba(10,10,10,0.2) 60%,
        transparent 100%
      );
    }

    /* Tag de categoría sobre el hero */
    .detail-hero__tag {
      position: absolute;
      top: 32px; right: 40px;
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: var(--gold);
      background: rgba(10,10,10,0.6);
      backdrop-filter: blur(4px);
      padding: 8px 16px;
      animation: detailFadeIn 0.7s var(--ease-out) 0.15s both;
    }

    /* Hero entrada */
    @keyframes detailFadeUp {
      from { opacity: 0; transform: translateY(24px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    @keyframes detailFadeIn {
      from { opacity: 0; }
      to   { opacity: 1; }
    }

    /* Título e info dentro del hero (esquina inferior izquierda) */
    .detail-hero__caption {
      position: absolute;
      bottom: 0; left: 0; right: 0;
      padding: 48px 40px;
      z-index: 2;
    }

    .detail-hero__title {
      font-family: var(--font-serif);
      font-style: italic;
      font-size: clamp(1.6rem, 3.5vw, 2.8rem);
      font-weight: 400;
      color: var(--white);
      line-height: 1.15;
      margin-bottom: 10px;
      animation: detailFadeUp 0.8s var(--ease-out) 0.25s both;
    }

    .detail-hero__meta {
      font-size: 12px;
      font-weight: 500;
      letter-spacing: 0.16em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.55);
      animation: detailFadeUp 0.7s var(--ease-out) 0.42s both;
    }


    /* ─── 6. INFORMACIÓN DEL PROYECTO ───────────────────────── */
    /* 2 columnas: descripción izquierda, características derecha.
       Fondo crema. */
    .detail-info {
      padding: 100px 0;
      background: var(--cream);
    }

    .detail-info__grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 80px;
      align-items: start;
    }

    .detail-info__label {
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: var(--gold);
      margin-bottom: 16px;
    }

    .detail-info__quote {
      font-family: var(--font-serif);
      font-style: italic;
      font-size: clamp(1.4rem, 2.5vw, 2rem);
      font-weight: 400;
      color: var(--dark);
      line-height: 1.4;
      margin-bottom: 28px;
    }

    .detail-info__desc {
      font-size: 0.975rem;
      line-height: 1.8;
      color: var(--text-body);
    }

    /* Columna derecha: datos + features */
    .detail-info__meta-block {
      display: flex;
      flex-direction: column;
      gap: 32px;
    }

    .detail-info__data {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      padding-bottom: 32px;
      border-bottom: 1px solid rgba(184,155,94,0.25);
    }

    .data-item__key {
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.16em;
      text-transform: uppercase;
      color: var(--text-muted);
      margin-bottom: 6px;
    }

    .data-item__val {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--dark);
    }

    /* Lista de características del proyecto */
    .detail-features__title {
      font-family: var(--font-serif);
      font-size: 1.1rem;
      font-weight: 400;
      color: var(--dark);
      margin-bottom: 20px;
    }

    .detail-features__list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .detail-features__list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.9rem;
      line-height: 1.6;
      color: var(--text-body);
      opacity: 0;
      transform: translateX(-16px);
      transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
    }
    .detail-features__list.visible li { opacity: 1; transform: translateX(0); }
    .detail-features__list.visible li:nth-child(1) { transition-delay: 0.05s; }
    .detail-features__list.visible li:nth-child(2) { transition-delay: 0.12s; }
    .detail-features__list.visible li:nth-child(3) { transition-delay: 0.19s; }
    .detail-features__list.visible li:nth-child(4) { transition-delay: 0.26s; }
    .detail-features__list.visible li:nth-child(5) { transition-delay: 0.33s; }

    /* Guion dorado antes de cada característica */
    .detail-features__list li::before {
      content: '—';
      color: var(--gold);
      flex-shrink: 0;
      font-weight: 600;
    }


    /* ─── 7. GALERÍA DE FOTOS ───────────────────────────────── */
    .detail-gallery {
      background: var(--dark-mid, #2A2A2A);
      padding: 80px 0;
    }

    .detail-gallery__label {
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: rgba(184,155,94,0.7);
      margin-bottom: 32px;
      text-align: center;
    }

    .detail-gallery__grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 4px;
    }

    .detail-gallery__photo {
      overflow: hidden;
      aspect-ratio: 4 / 3;
      cursor: zoom-in;
    }

    .detail-gallery__photo img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.9s cubic-bezier(0.23, 1, 0.32, 1);
    }

    @media (hover: hover) and (pointer: fine) {
      .detail-gallery__photo:hover img { transform: scale(1.06); }
    }


    /* ─── 8. CTA SOLICITAR ───────────────────────────────────── */
    .detail-cta {
      padding: 100px 0;
      background: var(--cream);
      text-align: center;
    }

    .detail-cta__label {
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: var(--gold);
      margin-bottom: 16px;
    }

    .detail-cta__title {
      font-family: var(--font-serif);
      font-style: italic;
      font-size: clamp(1.8rem, 3vw, 2.5rem);
      font-weight: 400;
      color: var(--dark);
      line-height: 1.2;
      margin-bottom: 40px;
    }

    .detail-cta__actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* Botón primario */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-sans);
      font-size: 13px;
      font-weight: 500;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--white);
      background: var(--dark);
      padding: 16px 36px;
      transition: background var(--t-fast), transform 160ms ease-out;
    }
    .btn-primary:hover  { background: var(--gold); }
    .btn-primary:active { transform: scale(0.97); }

    /* Botón outline */
    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-sans);
      font-size: 13px;
      font-weight: 500;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--dark);
      border: 1.5px solid var(--dark);
      padding: 15px 35px;
      transition: background var(--t-fast), color var(--t-fast), transform 160ms ease-out;
    }
    .btn-outline:hover  { background: var(--dark); color: var(--white); }
    .btn-outline:active { transform: scale(0.97); }


    /* ─── 9. FOOTER (mínimo) ─────────────────────────────────── */
    .footer-min {
      background: var(--dark);
      padding: 40px 0;
    }

    .footer-min__inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .footer-min img { height: 60px; }

    .footer-min__copy {
      font-size: 12px;
      color: rgba(255,255,255,0.25);
    }

    .footer-min__cats {
      font-size: 11px;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.2);
    }


    /* ─── 10. ESTADO DE ERROR (id inválido) ──────────────────── */
    /* Se muestra si el ?id= no existe en el objeto de proyectos. */
    .error-state {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 40px;
      margin-top: 76px;
    }

    .error-state__number {
      font-family: var(--font-serif);
      font-size: 8rem;
      font-weight: 600;
      color: rgba(184,155,94,0.15);
      line-height: 1;
      margin-bottom: 24px;
    }

    .error-state__title {
      font-family: var(--font-serif);
      font-style: italic;
      font-size: 2rem;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .error-state__desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 40px;
    }


    /* ─── 11. RESPONSIVE ──────────────────────────────────────── */

    @media (max-width: 1024px) {
      .container { padding: 0 28px; }
      .detail-info__grid { gap: 48px; }
      .btn-back { left: 28px; }
      .detail-hero__caption { padding: 40px 28px; }
    }

    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .navbar__links { display: none; }
      .navbar__burger { display: flex; }

      .btn-back { top: 16px; left: 20px; padding: 10px 16px; font-size: 11px; }

      .detail-hero { height: 65vh; }
      .detail-hero__caption { padding: 32px 20px; }
      .detail-hero__tag { top: 20px; right: 20px; }

      .detail-info { padding: 64px 0; }
      .detail-info__grid { grid-template-columns: 1fr; gap: 48px; }

      .detail-info__data { grid-template-columns: 1fr 1fr; }

      .detail-gallery { padding: 56px 0; }
      .detail-gallery__grid { grid-template-columns: repeat(2, 1fr); }

      .detail-cta { padding: 64px 0; }

      .footer-min__inner { flex-direction: column; text-align: center; gap: 12px; }
      .footer-min__cats { display: none; }
    }

    @media (max-width: 480px) {
      .detail-hero__title { font-size: 1.4rem; }
      .detail-info__data { grid-template-columns: 1fr; }
      .detail-cta__actions { flex-direction: column; align-items: stretch; }
      .btn-primary, .btn-outline { justify-content: center; }
      .detail-gallery__grid { grid-template-columns: 1fr; }
    }


    /* ─── LIGHTBOX ──────────────────────────────────────────────── */
    .lightbox {
      position: fixed;
      inset: 0;
      z-index: 2000;
      background: rgba(0, 0, 0, 0.93);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 24px;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.32s cubic-bezier(0.23, 1, 0.32, 1), visibility 0.32s;
      cursor: zoom-out;
    }
    .lightbox.open {
      opacity: 1;
      visibility: visible;
    }
    .lightbox__img {
      max-width: 90vw;
      max-height: 88vh;
      object-fit: contain;
      box-shadow: 0 40px 100px rgba(0,0,0,0.6);
      transform: scale(0.94);
      transition: transform 0.38s cubic-bezier(0.23, 1, 0.32, 1);
    }
    .lightbox.open .lightbox__img {
      transform: scale(1);
    }
    .lightbox__close {
      position: absolute;
      top: 20px;
      right: 28px;
      font-size: 36px;
      font-weight: 300;
      line-height: 1;
      color: rgba(255,255,255,0.6);
      background: none;
      border: none;
      cursor: pointer;
      font-family: inherit;
      transition: color 0.18s ease-out, transform 0.22s ease-out;
    }
    .lightbox__close:hover {
      color: var(--gold);
      transform: rotate(90deg);
    }
    .lightbox__prev,
    .lightbox__next {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(255,255,255,0.08);
      border: 1.5px solid rgba(255,255,255,0.25);
      color: #fff;
      font-size: 1.4rem;
      width: 52px;
      height: 52px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: background 0.2s, border-color 0.2s;
      z-index: 10;
    }
    .lightbox__prev { left: 24px; }
    .lightbox__next { right: 24px; }
    .lightbox__prev:hover,
    .lightbox__next:hover { background: rgba(184,155,94,0.35); border-color: #B89B5E; }