/* =========================================================
   Twin of Death — styles.css
   Dark, cinematic, atmospheric. No external dependencies.
   ========================================================= */

:root {
  --black:        #05070b;
  --graphite:     #0b0f16;
  --graphite-2:   #11151d;
  --indigo:       #141a2b;
  --indigo-deep:  #0a0e1c;
  --silver:       #c8d0db;
  --silver-muted: #8b94a3;
  --blue-gray:    #6f7d90;
  --fog:          rgba(150, 168, 190, 0.06);
  --glow-color:   rgba(120, 150, 200, 0.16);

  --fz-title: clamp(2.8rem, 11vw, 8rem);
  --maxw: 760px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--black);
  color: var(--silver);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman",
               Georgia, serif;
  font-size: 18px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ---------- Accessibility helpers ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 100;
  padding: 0.6em 1em;
  background: var(--graphite-2);
  color: var(--silver);
  border: 1px solid rgba(143, 160, 181, 0.3);
  border-radius: 4px;
  text-decoration: none;
}
.skip-link:focus { left: 1rem; top: 1rem; }

:focus-visible {
  outline: 2px solid var(--blue-gray);
  outline-offset: 4px;
  border-radius: 2px;
}

/* =========================================================
   Atmosphere — procedural, CSS-only background layers
   ========================================================= */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% -10%, #0d1320 0%, var(--black) 55%),
    linear-gradient(180deg, var(--indigo-deep) 0%, var(--black) 70%);
}

/* Mouse-following soft glow */
.glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 70vmax;
  height: 70vmax;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at center,
              var(--glow-color) 0%,
              rgba(120, 150, 200, 0.05) 30%,
              transparent 60%);
  will-change: transform;
  transition: transform 1.4s var(--ease);
}

/* Drifting fog fields */
.fog {
  position: absolute;
  inset: -25%;
  background:
    radial-gradient(40% 30% at 30% 40%, var(--fog) 0%, transparent 60%),
    radial-gradient(50% 35% at 70% 60%, var(--fog) 0%, transparent 65%),
    radial-gradient(35% 25% at 50% 80%, var(--fog) 0%, transparent 60%);
  opacity: 0.9;
  filter: blur(8px);
}
.fog-a { animation: drift-a 46s linear infinite; }
.fog-b { animation: drift-b 63s linear infinite; opacity: 0.6; }

@keyframes drift-a {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(3%, -2%, 0) scale(1.06); }
  100% { transform: translate3d(0, 0, 0) scale(1); }
}
@keyframes drift-b {
  0%   { transform: translate3d(0, 0, 0) scale(1.05); }
  50%  { transform: translate3d(-4%, 3%, 0) scale(1); }
  100% { transform: translate3d(0, 0, 0) scale(1.05); }
}

/* Eclipse — faint cold moon, off-center */
.eclipse {
  position: absolute;
  top: 16%;
  left: 62%;
  width: 46vmin;
  height: 46vmin;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 38%,
              rgba(190, 205, 225, 0.10) 0%,
              rgba(120, 140, 170, 0.05) 38%,
              transparent 62%);
  box-shadow: 0 0 18vmin 4vmin rgba(110, 135, 175, 0.05);
  animation: breathe 14s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50%      { opacity: 1;   transform: scale(1.02); }
}

/* Distant ridge / mountain silhouette via layered gradients */
.ridge {
  position: absolute;
  left: -5%;
  right: -5%;
  bottom: 0;
  height: 42vh;
  background:
    radial-gradient(120% 100% at 20% 130%, #060912 0%, transparent 60%),
    radial-gradient(110% 100% at 78% 135%, #04060c 0%, transparent 58%),
    linear-gradient(180deg, transparent 0%, rgba(2, 3, 6, 0.9) 78%, var(--black) 100%);
  clip-path: polygon(
    0% 100%, 0% 70%, 8% 64%, 16% 72%, 24% 58%, 33% 66%,
    42% 50%, 52% 62%, 61% 47%, 70% 60%, 80% 52%, 90% 64%, 100% 56%, 100% 100%
  );
  opacity: 0.85;
}

/* Star-like particles, very sparse */
.stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(200, 214, 232, 0.7), transparent),
    radial-gradient(1px 1px at 28% 9%,  rgba(200, 214, 232, 0.5), transparent),
    radial-gradient(1px 1px at 47% 22%, rgba(200, 214, 232, 0.6), transparent),
    radial-gradient(1px 1px at 66% 12%, rgba(200, 214, 232, 0.45), transparent),
    radial-gradient(1px 1px at 81% 26%, rgba(200, 214, 232, 0.6), transparent),
    radial-gradient(1px 1px at 91% 8%,  rgba(200, 214, 232, 0.4), transparent),
    radial-gradient(1px 1px at 38% 33%, rgba(200, 214, 232, 0.4), transparent),
    radial-gradient(1px 1px at 73% 38%, rgba(200, 214, 232, 0.35), transparent);
  opacity: 0.55;
  animation: twinkle 9s ease-in-out infinite;
}
@keyframes twinkle {
  0%, 100% { opacity: 0.45; }
  50%      { opacity: 0.7; }
}

/* Procedural grain overlay (SVG fractal noise, inlined) */
.grain {
  position: absolute;
  inset: -50%;
  width: 200%;
  height: 200%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.04;
  mix-blend-mode: overlay;
  animation: grain-shift 1.1s steps(4) infinite;
}
@keyframes grain-shift {
  0%   { transform: translate(0, 0); }
  25%  { transform: translate(-4%, 2%); }
  50%  { transform: translate(3%, -3%); }
  75%  { transform: translate(-2%, 4%); }
  100% { transform: translate(0, 0); }
}

/* Cinematic vignette */
.vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 90% at 50% 45%,
              transparent 55%, rgba(0, 0, 0, 0.55) 100%);
}

/* =========================================================
   Hero / content
   ========================================================= */
.hero {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8vh 1.5rem 4vh;
}

.hero-inner {
  max-width: var(--maxw);
  text-align: center;
}

.eyebrow {
  margin: 0 0 1.8rem;
  font-size: 0.72rem;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--blue-gray);
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
}

.title {
  margin: 0;
  font-weight: 400;
  font-size: var(--fz-title);
  line-height: 0.98;
  letter-spacing: 0.02em;
  color: #e6ebf2;
  text-shadow:
    0 0 40px rgba(120, 150, 200, 0.18),
    0 0 90px rgba(80, 110, 160, 0.12);
}

.subtitle {
  margin: 1.6rem 0 0;
  font-size: clamp(1.05rem, 3.2vw, 1.5rem);
  font-style: italic;
  color: var(--silver);
  letter-spacing: 0.03em;
}

.manifesto {
  margin: 2.6rem auto 0;
  max-width: 50ch;
  font-size: clamp(0.98rem, 2.4vw, 1.12rem);
  color: var(--silver-muted);
  line-height: 1.85;
}

.closed {
  margin: 3rem 0 0;
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--silver);
}
.closed-mark {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue-gray);
  box-shadow: 0 0 10px 2px rgba(111, 125, 144, 0.6);
  animation: pulse 4.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.45; transform: scale(0.9); }
  50%      { opacity: 1;    transform: scale(1.15); }
}

.signal {
  margin: 1.1rem 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue-gray);
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  padding: 2.2rem 1.5rem 2.6rem;
  text-align: center;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.6em;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}
.footer-nav a {
  color: var(--silver-muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  transition: color 0.5s var(--ease);
}
.footer-nav a:hover { color: var(--silver); }
.dot { color: var(--blue-gray); opacity: 0.6; }
.copyright {
  margin: 1.1rem 0 0;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue-gray);
}

/* =========================================================
   Reveal animation
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  filter: blur(6px);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
  filter: blur(0);
  transition:
    opacity 1.6s var(--ease),
    transform 1.6s var(--ease),
    filter 1.6s var(--ease);
}
/* Staggered delays */
.reveal[data-delay="1"].is-visible { transition-delay: 0.10s; }
.reveal[data-delay="2"].is-visible { transition-delay: 0.30s; }
.reveal[data-delay="3"].is-visible { transition-delay: 0.65s; }
.reveal[data-delay="4"].is-visible { transition-delay: 0.95s; }
.reveal[data-delay="5"].is-visible { transition-delay: 1.30s; }
.reveal[data-delay="6"].is-visible { transition-delay: 1.60s; }
.reveal[data-delay="7"].is-visible { transition-delay: 1.90s; }

/* =========================================================
   Legal / document pages
   ========================================================= */
.doc {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
  padding: clamp(4rem, 10vh, 7rem) 1.6rem 4rem;
}
.doc-header { margin-bottom: 3rem; }
.doc-home {
  display: inline-block;
  margin-bottom: 2.4rem;
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue-gray);
  text-decoration: none;
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  transition: color 0.5s var(--ease);
}
.doc-home:hover { color: var(--silver); }
.doc-home::before { content: "← "; }

.doc h1 {
  margin: 0 0 0.5rem;
  font-weight: 400;
  font-size: clamp(1.9rem, 6vw, 3rem);
  letter-spacing: 0.02em;
  color: #e6ebf2;
}
.doc .updated {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue-gray);
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
}
.doc h2 {
  margin: 2.8rem 0 0.8rem;
  font-weight: 400;
  font-size: 1.28rem;
  letter-spacing: 0.02em;
  color: var(--silver);
}
.doc h2 .num {
  color: var(--blue-gray);
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.85em;
  margin-right: 0.5em;
}
.doc p, .doc li {
  color: var(--silver-muted);
  font-size: 1rem;
  line-height: 1.85;
}
.doc ul { padding-left: 1.4rem; }
.doc li { margin-bottom: 0.5rem; }
.doc strong { color: var(--silver); font-weight: 600; }
.doc a { color: var(--silver); }

.doc .lede {
  font-size: 1.08rem;
  color: var(--silver);
  line-height: 1.9;
}

.disclaimer {
  margin-top: 3.5rem;
  padding: 1.4rem 1.6rem;
  border: 1px solid rgba(143, 160, 181, 0.16);
  border-radius: 6px;
  background: rgba(17, 21, 29, 0.5);
  font-size: 0.9rem;
  color: var(--blue-gray);
}
.disclaimer p { font-size: 0.9rem; margin: 0; }

.doc-divider {
  margin: 3.5rem 0 0;
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(143, 160, 181, 0.22), transparent);
}

/* =========================================================
   404 page
   ========================================================= */
.error-page .hero-inner { max-width: 620px; }
.error-code {
  margin: 0 0 1rem;
  font-size: clamp(3.5rem, 16vw, 9rem);
  font-weight: 400;
  line-height: 1;
  color: #e6ebf2;
  letter-spacing: 0.04em;
  text-shadow: 0 0 50px rgba(120, 150, 200, 0.16);
}
.btn {
  display: inline-block;
  margin-top: 2.6rem;
  padding: 0.85em 2.6em;
  font-size: 0.8rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--silver);
  text-decoration: none;
  border: 1px solid rgba(143, 160, 181, 0.3);
  border-radius: 3px;
  background: rgba(17, 21, 29, 0.4);
  transition: border-color 0.5s var(--ease), color 0.5s var(--ease),
              background 0.5s var(--ease);
}
.btn:hover {
  color: #e6ebf2;
  border-color: rgba(143, 160, 181, 0.6);
  background: rgba(20, 26, 43, 0.6);
}

/* =========================================================
   Reduced motion
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .glow { transition: none; }
  .reveal { opacity: 1; transform: none; filter: none; }
}

/* =========================================================
   Small screens
   ========================================================= */
@media (max-width: 520px) {
  body { font-size: 17px; }
  .eyebrow { letter-spacing: 0.32em; }
  .closed { font-size: 0.82rem; letter-spacing: 0.12em; }
}