/* =========================================================
   S.T.A.L.K.E.R. 2: Heart of Chornobyl — hoja de estilos
   Sistema de diseño: PDA / contador Geiger / señal de fósforo
   ========================================================= */

:root{
  /* color */
  --color-bg:        #14160f;
  --color-surface:   #1b1f15;
  --color-surface-2: #20251a;
  --color-border:    #34392a;
  --color-text:      #e9e6d6;
  --color-text-dim:  #9a9c87;
  --color-green:     #c4e538;
  --color-green-dim: #7a9a2a;
  --color-rust:      #cc7a32;
  --color-red:       #c2402c;

  /* type */
  --font-display: "Big Shoulders Stencil", sans-serif;
  --font-body:    "Archivo", sans-serif;
  --font-mono:    "JetBrains Mono", monospace;

  /* layout */
  --maxw: 1180px;
  --pad: clamp(1.25rem, 4vw, 3rem);
  --radius: 2px;
}

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

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  background:var(--color-bg);
  color:var(--color-text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img,svg{ display:block; max-width:100%; }

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

ul,dl{ margin:0; padding:0; list-style:none; }

h1,h2,h3{
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:0.02em;
  margin:0;
  text-transform:uppercase;
}

p{ margin:0 0 1em; }
p:last-child{ margin-bottom:0; }

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

/* faint background grid + grain, gives the whole page a HUD feel */
body{
  background-image:
    linear-gradient(rgba(196,229,56,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196,229,56,0.025) 1px, transparent 1px);
  background-size:48px 48px;
}

.noise-overlay{
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:999;
  opacity:0.035;
  mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* =========================================================
   HEADER
   ========================================================= */

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(20,22,15,0.88);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--color-border);
}

.header-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0.85rem var(--pad);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
}

.brand{
  display:flex;
  align-items:center;
  gap:0.6rem;
  color:var(--color-text);
}

.brand-mark{ color:var(--color-green); flex:none; }

.brand-text{
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.05rem;
  letter-spacing:0.03em;
  line-height:1.1;
  display:flex;
  flex-direction:column;
}

.brand-text small{
  font-family:var(--font-mono);
  font-weight:500;
  font-size:0.58rem;
  letter-spacing:0.18em;
  color:var(--color-text-dim);
}

.primary-nav{
  display:flex;
  gap:1.75rem;
}

.primary-nav a{
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:var(--color-text-dim);
  position:relative;
  padding:0.3rem 0;
  transition:color 0.2s ease;
}

.primary-nav a::after{
  content:"";
  position:absolute;
  left:0; bottom:-2px;
  width:0%;
  height:1px;
  background:var(--color-green);
  transition:width 0.2s ease;
}

.primary-nav a:hover,
.primary-nav a.is-active{
  color:var(--color-green);
}

.primary-nav a:hover::after,
.primary-nav a.is-active::after{
  width:100%;
}

.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:38px;
  height:38px;
  background:transparent;
  border:1px solid var(--color-border);
  cursor:pointer;
}

.nav-toggle span{
  display:block;
  height:2px;
  margin:0 7px;
  background:var(--color-text);
  transition:transform 0.25s ease, opacity 0.25s ease;
}

/* =========================================================
   HERO
   ========================================================= */

.hero{
  position:relative;
  overflow:hidden;
  padding:clamp(3.5rem, 9vw, 6.5rem) var(--pad) clamp(2.5rem, 6vw, 4rem);
  display:grid;
  grid-template-columns:1fr;
  gap:2.5rem;
  border-bottom:1px solid var(--color-border);
  background:
    radial-gradient(ellipse at 18% -10%, rgba(196,229,56,0.10), transparent 55%),
    radial-gradient(ellipse at 90% 10%, rgba(204,122,50,0.08), transparent 50%);
}

.scanlines{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,0.022) 0px,
    rgba(255,255,255,0.022) 1px,
    transparent 1px,
    transparent 3px
  );
}

.hero-inner{ max-width:760px; position:relative; }

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:0.5rem;
  font-family:var(--font-mono);
  font-size:0.72rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--color-text-dim);
  margin-bottom:1.4rem;
}

.signal-dot{
  width:7px; height:7px;
  border-radius:50%;
  background:var(--color-green);
  box-shadow:0 0 6px var(--color-green);
  animation:pulse 1.8s ease-in-out infinite;
}

@keyframes pulse{
  0%,100%{ opacity:1; }
  50%{ opacity:0.25; }
}

.hero-title{
  display:flex;
  flex-direction:column;
  line-height:0.92;
}

.hero-title .line-1{
  font-size:clamp(2.6rem, 9vw, 5.2rem);
  color:var(--color-text);
}

.hero-title .line-2{
  font-size:clamp(1.5rem, 5vw, 2.7rem);
  color:var(--color-green);
  margin-top:0.2rem;
}

.hero-tagline{
  margin-top:1.6rem;
  max-width:54ch;
  font-size:clamp(0.98rem, 1.4vw, 1.08rem);
  color:var(--color-text-dim);
}

.hero-meta{
  margin-top:2.2rem;
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(140px, 1fr));
  gap:1px;
  background:var(--color-border);
  border:1px solid var(--color-border);
  max-width:620px;
}

.meta-item{
  background:var(--color-surface);
  padding:0.7rem 0.9rem;
  display:flex;
  flex-direction:column;
  gap:0.25rem;
}

.meta-label{
  font-family:var(--font-mono);
  font-size:0.62rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--color-text-dim);
}

.meta-value{
  font-family:var(--font-mono);
  font-size:0.86rem;
  color:var(--color-text);
}

.scroll-cue{
  margin-top:2.6rem;
  display:inline-flex;
  align-items:center;
  gap:0.6rem;
  font-family:var(--font-mono);
  font-size:0.7rem;
  letter-spacing:0.14em;
  color:var(--color-green);
}

.scroll-cue svg{ animation:bob 1.6s ease-in-out infinite; }

@keyframes bob{
  0%,100%{ transform:translateY(0); }
  50%{ transform:translateY(4px); }
}

/* Geiger widget */
.geiger-widget{
  position:relative;
  justify-self:start;
  width:100%;
  max-width:300px;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  padding:1.1rem 1.2rem 1.3rem;
}

.geiger-head{
  display:flex;
  justify-content:space-between;
  font-family:var(--font-mono);
  font-size:0.66rem;
  letter-spacing:0.1em;
  color:var(--color-text-dim);
  margin-bottom:0.6rem;
}

.geiger-readout{
  font-family:var(--font-mono);
  font-size:2.6rem;
  font-weight:600;
  color:var(--color-green);
  text-shadow:0 0 12px rgba(196,229,56,0.45);
  letter-spacing:0.02em;
}

.geiger-gauge{ margin-top:1rem; }

.gauge-track{
  height:8px;
  background:var(--color-bg);
  border:1px solid var(--color-border);
  position:relative;
  overflow:hidden;
}

.gauge-track::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg, var(--color-green) 0%, var(--color-rust) 60%, var(--color-red) 100%);
  opacity:0.35;
}

.gauge-needle{
  position:absolute;
  top:0; bottom:0;
  left:0;
  width:3px;
  background:var(--color-text);
  box-shadow:0 0 6px rgba(233,230,214,0.8);
  transition:left 1.1s ease;
}

.gauge-labels{
  display:flex;
  justify-content:space-between;
  margin-top:0.4rem;
  font-family:var(--font-mono);
  font-size:0.58rem;
  letter-spacing:0.08em;
  color:var(--color-text-dim);
}

.geiger-ticks{
  margin-top:0.9rem;
  height:1.1rem;
  font-family:var(--font-mono);
  font-size:0.7rem;
  color:var(--color-green-dim);
  white-space:nowrap;
  overflow:hidden;
}

/* =========================================================
   SECTIONS — shared
   ========================================================= */

.section{ padding:clamp(3rem, 8vw, 5.5rem) var(--pad); border-bottom:1px solid var(--color-border); }
.section-alt{ background:var(--color-surface); }

.section-inner{ max-width:var(--maxw); margin:0 auto; }

.section-eyebrow{
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.16em;
  color:var(--color-green-dim);
  margin-bottom:0.6rem;
}

.section-title{
  font-size:clamp(1.7rem, 4vw, 2.4rem);
  margin-bottom:1.4rem;
}

.section-lede{
  max-width:64ch;
  color:var(--color-text-dim);
  font-size:1rem;
  margin-bottom:2.4rem;
}

/* reveal-on-scroll */
.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible{
  opacity:1;
  transform:translateY(0);
}

/* =========================================================
   ABOUT
   ========================================================= */

.about-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:clamp(2rem, 5vw, 3.5rem);
  align-items:start;
}

.about-text p{ color:var(--color-text-dim); }
.about-text p:first-child{ color:var(--color-text); }

.spec-panel{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-left:3px solid var(--color-green);
  padding:1.4rem 1.5rem;
}

.spec-title{
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--color-text-dim);
  margin-bottom:1rem;
}

.spec-row{
  display:flex;
  justify-content:space-between;
  gap:1rem;
  padding:0.55rem 0;
  border-top:1px solid var(--color-border);
  font-size:0.86rem;
}

.spec-row:first-child{ border-top:none; }

.spec-row dt{ color:var(--color-text-dim); }
.spec-row dd{ margin:0; text-align:right; font-family:var(--font-mono); font-size:0.78rem; }

/* =========================================================
   FEATURE GRID (La Zona)
   ========================================================= */

.feature-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:1px;
  background:var(--color-border);
  border:1px solid var(--color-border);
}

.feature-card{
  background:var(--color-bg);
  padding:1.6rem 1.4rem;
}

.feature-icon{
  width:34px; height:34px;
  color:var(--color-green);
  margin-bottom:1rem;
}

.feature-card h3{
  font-size:1.05rem;
  margin-bottom:0.5rem;
}

.feature-card p{
  color:var(--color-text-dim);
  font-size:0.9rem;
}

/* =========================================================
   A-LIFE PANEL
   ========================================================= */

.alife-panel{
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:clamp(2rem, 5vw, 3.5rem);
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-top:3px solid var(--color-green);
  padding:clamp(1.6rem, 4vw, 2.6rem);
}

.alife-text p{ color:var(--color-text-dim); }

.alife-list li{
  font-family:var(--font-mono);
  font-size:0.84rem;
  color:var(--color-text-dim);
  padding:0.8rem 0;
  border-top:1px solid var(--color-border);
}
.alife-list li:first-child{ border-top:none; padding-top:0; }

.alife-list li span{
  display:block;
  color:var(--color-green);
  font-weight:600;
  margin-bottom:0.2rem;
  letter-spacing:0.02em;
}

/* =========================================================
   FACTIONS
   ========================================================= */

.faction-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(260px, 1fr));
  gap:1.1rem;
}

.faction-card{
  background:var(--color-bg);
  border:1px solid var(--color-border);
  border-left:3px solid var(--accent, var(--color-green));
  padding:1.3rem 1.4rem;
  transition:transform 0.2s ease, border-color 0.2s ease;
}

.faction-card:hover{
  transform:translateY(-3px);
}

.faction-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:0.62rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--accent, var(--color-green));
  border:1px solid var(--accent, var(--color-green));
  padding:0.15rem 0.5rem;
  margin-bottom:0.8rem;
}

.faction-card h3{
  font-size:1.15rem;
  margin-bottom:0.5rem;
}

.faction-card p{
  color:var(--color-text-dim);
  font-size:0.88rem;
}

/* =========================================================
   TIMELINE (Lanzamiento)
   ========================================================= */

.timeline{
  display:flex;
  flex-direction:column;
}

.timeline-item{
  display:grid;
  grid-template-columns:160px 1fr;
  gap:1.5rem;
  padding:1.6rem 0;
  border-top:1px solid var(--color-border);
}
.timeline-item:first-child{ border-top:none; }

.timeline-date{
  font-family:var(--font-mono);
  font-size:0.82rem;
  color:var(--color-green);
  letter-spacing:0.03em;
}

.timeline-body h3{
  font-size:1.05rem;
  margin-bottom:0.5rem;
}

.timeline-body p{
  color:var(--color-text-dim);
  font-size:0.92rem;
  max-width:62ch;
}

/* =========================================================
   FOOTER
   ========================================================= */

.site-footer{
  padding:2rem var(--pad);
}

.footer-inner{
  max-width:var(--maxw);
  margin:0 auto;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:1rem;
}

.footer-disclaimer{
  color:var(--color-text-dim);
  font-size:0.78rem;
  max-width:56ch;
}

.footer-sync{
  font-family:var(--font-mono);
  font-size:0.72rem;
  color:var(--color-text-dim);
  white-space:nowrap;
}

/* =========================================================
   GALERÍA
   ========================================================= */

.gallery-filters{
  display:flex;
  flex-wrap:wrap;
  gap:0.6rem;
  margin-bottom:2rem;
}

.filter-pill{
  font-family:var(--font-mono);
  font-size:0.72rem;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--color-text-dim);
  background:var(--color-bg);
  border:1px solid var(--color-border);
  padding:0.45rem 0.9rem;
  cursor:pointer;
  transition:color 0.2s ease, border-color 0.2s ease;
}

.filter-pill:hover{
  color:var(--color-text);
  border-color:var(--color-text-dim);
}

.filter-pill.is-active{
  color:var(--color-bg);
  background:var(--color-green);
  border-color:var(--color-green);
}

.gallery-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:1px;
  background:var(--color-border);
  border:1px solid var(--color-border);
}

.gallery-card{
  margin:0;
  position:relative;
  background:var(--color-bg);
  overflow:hidden;
  cursor:pointer;
}

.gallery-card img{
  width:100%;
  height:100%;
  aspect-ratio:16/6;
  object-fit:cover;
  display:block;
  transition:transform 0.5s ease, filter 0.5s ease;
  filter:saturate(0.92) contrast(1.02);
}

.gallery-card:hover img{
  transform:scale(1.04);
  filter:saturate(1.05) contrast(1.05);
}

.gallery-card figcaption{
  position:absolute;
  left:0; right:0; bottom:0;
  padding:0.6rem 0.8rem;
  background:linear-gradient(to top, rgba(0,0,0,0.78), transparent);
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--color-text);
  display:flex;
  align-items:center;
  gap:0.55rem;
}

.cap-tag{
  font-size:0.6rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--color-green);
  border:1px solid var(--color-green);
  padding:0.1rem 0.4rem;
}

.gallery-card[hidden]{ display:none; }

/* =========================================================
   LIGHTBOX
   ========================================================= */

.lightbox{
  position:fixed;
  inset:0;
  z-index:1000;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(10,11,7,0.94);
  opacity:0;
  visibility:hidden;
  transition:opacity 0.25s ease;
  padding:4rem 1.2rem;
}

.lightbox.is-open{
  opacity:1;
  visibility:visible;
}

.lightbox-figure{
  margin:0;
  max-width:min(1100px, 92vw);
  width:100%;
}

.lightbox-figure img{
  width:100%;
  height:auto;
  border:1px solid var(--color-border);
  display:block;
}

.lightbox-figure figcaption{
  margin-top:0.8rem;
  font-family:var(--font-mono);
  font-size:0.82rem;
  color:var(--color-text-dim);
  text-align:center;
}

.lightbox-close,
.lightbox-nav{
  position:absolute;
  background:transparent;
  border:1px solid var(--color-border);
  color:var(--color-text);
  cursor:pointer;
  font-family:var(--font-mono);
  transition:color 0.2s ease, border-color 0.2s ease;
}

.lightbox-close:hover,
.lightbox-nav:hover{
  color:var(--color-green);
  border-color:var(--color-green);
}

.lightbox-close{
  top:1.2rem;
  right:1.2rem;
  width:38px;
  height:38px;
  font-size:1rem;
}

.lightbox-nav{
  top:50%;
  transform:translateY(-50%);
  width:44px;
  height:64px;
  font-size:1.6rem;
}

.lightbox-prev{ left:1.2rem; }
.lightbox-next{ right:1.2rem; }

/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 980px){
  .hero{ grid-template-columns:1fr; }
  .geiger-widget{ max-width:360px; }
  .about-grid{ grid-template-columns:1fr; }
  .alife-panel{ grid-template-columns:1fr; }
  .feature-grid{ grid-template-columns:repeat(2, 1fr); }
}

@media (max-width: 700px){
  .gallery-grid{ grid-template-columns:1fr; }
  .gallery-card img{ aspect-ratio:16/9; }
}

@media (max-width: 760px){
  .primary-nav{
    position:absolute;
    top:100%; left:0; right:0;
    background:var(--color-bg);
    border-bottom:1px solid var(--color-border);
    flex-direction:column;
    gap:0;
    max-height:0;
    overflow:hidden;
    transition:max-height 0.3s ease;
  }
  .primary-nav[data-state="open"]{ max-height:320px; }
  .primary-nav a{
    padding:0.9rem var(--pad);
    border-top:1px solid var(--color-border);
  }
  .primary-nav a::after{ display:none; }

  .nav-toggle{ display:flex; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

  .timeline-item{ grid-template-columns:1fr; gap:0.4rem; }

  .lightbox{ padding:3.5rem 0.6rem; }
  .lightbox-nav{ width:36px; height:52px; font-size:1.3rem; }
  .lightbox-prev{ left:0.3rem; }
  .lightbox-next{ right:0.3rem; }
  .lightbox-close{ top:0.6rem; right:0.6rem; width:34px; height:34px; }
}

@media (max-width: 600px){
  .feature-grid{ grid-template-columns:1fr; }
  .hero-meta{ grid-template-columns:repeat(2, 1fr); }
}

/* respect reduced motion */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .signal-dot, .scroll-cue svg{ animation:none; }
  .reveal{ transition:none; opacity:1; transform:none; }
  .gauge-needle{ transition:none; }
}