/* ==========================================================================
   PAPELEST — Sistema de diseño
   Maquetas papercraft de coches y motorsport, listas para imprimir.
   Paleta oscura + acentos técnicos, tarjetas con esquinas tipo HUD.
   ========================================================================== */

/* -- Fuentes ------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* -- Variables ------------------------------------------------------------ */
:root {
  /* Color: superficies */
  --color-bg: #0a0c10;
  --color-bg-elevated: #12151b;
  --color-bg-elevated-2: #191d25;
  --color-border: #262b35;
  --color-border-strong: #3a4150;

  /* Color: texto */
  --color-text: #e8eaed;
  --color-text-muted: #9aa1ad;
  --color-text-dim: #656d7a;

  /* Color: acentos */
  --color-accent: #00e5c8;        /* cian técnico — telemetría */
  --color-accent-dark: #00a693;
  --color-accent-2: #ff3860;      /* rojo carrera — CTA / descarga */
  --color-accent-2-dark: #d4264c;
  --color-amber: #ffb020;         /* ámbar — dificultad / avisos */

  /* Categorías (usado en badges) */
  --color-cat-f1: #ff3860;
  --color-cat-rally: #ffb020;
  --color-cat-gt: #00e5c8;
  --color-cat-calle: #7c8cff;

  /* Tipografía */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Espaciado */
  --space-1: 0.4rem;
  --space-2: 0.8rem;
  --space-3: 1.2rem;
  --space-4: 1.6rem;
  --space-5: 2.4rem;
  --space-6: 4rem;

  /* Otros */
  --radius: 2px;
  --hud-size: 14px;
  --max-width: 1180px;
  --transition: 150ms ease;
}

/* -- Reset ----------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure { margin: 0; }
ul { list-style: none; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

body {
  background-color: var(--color-bg);
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 48px 48px;
  background-attachment: fixed;
  background-position: center;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* La cuadrícula de fondo es muy sutil: se aplica sobre el color base, no un patrón visible */
body {
  background-image: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

code, .mono { font-family: var(--font-mono); }

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* -- Encabezado de sección con etiqueta mono ------------------------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--color-accent);
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 12, 16, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-3);
  flex-wrap: wrap;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
}
.logo span { color: var(--color-accent); }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.9rem;
}

.site-nav a {
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.site-nav a:hover,
.site-nav a[aria-current="page"] { color: var(--color-text); }

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  border: 1px solid var(--color-border-strong);
  padding: 4px 10px;
  border-radius: var(--radius);
  transition: border-color var(--transition), color var(--transition);
}
.lang-switch:hover { color: var(--color-accent); border-color: var(--color-accent); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-block: var(--space-6) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.hero::before {
  content: "";
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  margin-bottom: var(--space-3);
}

.hero .eyebrow { justify-content: center; }

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  max-width: 16ch;
  margin-block: var(--space-3) var(--space-3);
  margin-inline: auto;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-accent);
}

.hero p {
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-inline: auto;
  font-size: 1.05rem;
}

/* ==========================================================================
   Buscador
   ========================================================================== */
.search-box {
  position: relative;
  max-width: 420px;
  margin-inline: auto;
}

.search-box svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  stroke: var(--color-text-dim);
  fill: none;
  stroke-width: 2;
  pointer-events: none;
  transition: stroke var(--transition);
}

.search-box input {
  width: 100%;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 11px 14px 11px 40px;
  border-radius: var(--radius);
}

.search-box input::placeholder { color: var(--color-text-dim); }

.search-box input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.search-box input:focus + svg { stroke: var(--color-accent); }

/* ==========================================================================
   Filtros
   ========================================================================== */
.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-4);
}

.filters__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.filter-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-strong);
  padding: 8px 16px;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.filter-tag:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.filter-tag.is-active {
  color: var(--color-bg);
  background: var(--color-accent);
  border-color: var(--color-accent);
  font-weight: 700;
}

/* ==========================================================================
   Grid de tarjetas
   ========================================================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
  padding-block: var(--space-4) var(--space-6);
}

.grid[hidden] { display: none; }

.empty-state {
  display: none;
  padding-block: var(--space-6);
  text-align: center;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
.empty-state.is-visible { display: block; }

/* -- Tarjeta con esquinas HUD ---------------------------------------------- */
.card {
  position: relative;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  padding: var(--space-1);
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

/* Esquinas tipo HUD: marcas en dos esquinas opuestas */
.card::before,
.card::after {
  content: "";
  position: absolute;
  width: var(--hud-size);
  height: var(--hud-size);
  border: 2px solid var(--color-accent);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.card::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}
.card::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}
.card:hover::before,
.card:hover::after,
.card:focus-within::before,
.card:focus-within::after { opacity: 1; }

.card__link {
  display: block;
  color: inherit;
}

.card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-bg-elevated-2);
  border: 1px solid var(--color-border);
}
.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease;
}
.card:hover .card__media img { transform: scale(1.04); }

.card__body {
  padding: var(--space-3) var(--space-2) var(--space-2);
}

.card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-1);
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 8px;
  border: 1px solid currentColor;
  border-radius: var(--radius);
}
.badge--f1 { color: var(--color-cat-f1); }
.badge--rally { color: var(--color-cat-rally); }
.badge--gt { color: var(--color-cat-gt); }
.badge--calle { color: var(--color-cat-calle); }

.card__difficulty {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--color-text-dim);
}

.card__title {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.card__excerpt {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

/* ==========================================================================
   Botones
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.btn--primary {
  background: var(--color-accent-2);
  color: #fff;
}
.btn--primary:hover { background: var(--color-accent-2-dark); }

.btn--ghost {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.btn--ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ==========================================================================
   Ficha de maqueta
   ========================================================================== */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-dim);
  padding-block: var(--space-3);
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-accent); }

.model-hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-5);
  padding-block: var(--space-3) var(--space-5);
  align-items: start;
}

@media (max-width: 860px) {
  .model-hero { grid-template-columns: 1fr; }
}

.model-hero__media {
  position: relative;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
}
.model-hero__media::before,
.model-hero__media::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-accent);
}
.model-hero__media::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.model-hero__media::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.model-hero__tags {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.model-hero h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: var(--space-2);
}

.model-hero__description {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin-bottom: var(--space-4);
}
.spec-table tr { border-bottom: 1px solid var(--color-border); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table th, .spec-table td {
  text-align: left;
  padding: 10px 0;
  font-weight: 400;
}
.spec-table th { color: var(--color-text-dim); width: 45%; }
.spec-table td { color: var(--color-text); }

.model-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.model-hero__filesize {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  align-self: center;
}

.model-section {
  padding-block: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.model-section h2 {
  font-size: 1.3rem;
  margin-bottom: var(--space-3);
}
.model-section p {
  color: var(--color-text-muted);
  max-width: 68ch;
}
.model-section ul {
  color: var(--color-text-muted);
  display: grid;
  gap: var(--space-1);
}
.model-section li::before {
  content: "// ";
  font-family: var(--font-mono);
  color: var(--color-accent);
}

/* ==========================================================================
   Ad slot
   ========================================================================== */
.ad-slot {
  border: 1px dashed var(--color-border-strong);
  background: var(--color-bg-elevated);
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 100px;
  margin-block: var(--space-4);
}

.ad-slot--wide { min-height: 120px; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-5);
  margin-top: var(--space-6);
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.85rem;
  color: var(--color-text-dim);
}
.site-footer a { color: var(--color-text-muted); }
.site-footer a:hover { color: var(--color-accent); }
.site-footer__links {
  display: flex;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}