/* =================================================================
   Oren Digital — shared styles
   Warm-dark studio identity. One amber accent, editorial serif
   display, grotesk body, mono meta. Built for static hosting.
   ================================================================= */

:root {
  /* Warm near-black palette */
  --bg:        #0b0a09;
  --bg-elev:   #131110;
  --ink:       #f4efe9;
  --ink-soft:  #b3aaa2;
  --ink-faint: #6f665f;
  --line:      rgba(244, 239, 233, 0.09);
  --line-strong: rgba(244, 239, 233, 0.16);

  /* Single accent: warm amber */
  --accent:      #eaa64d;
  --accent-soft: #f6cd92;
  --accent-glow: rgba(234, 166, 77, 0.22);

  /* Type */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Hanken Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Rhythm */
  --shell: min(1180px, 92vw);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
  line-height: 1.65;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* --- Atmosphere: radial glow + fine grain ----------------------- */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.atmosphere::before {
  /* warm glow drifting from upper-center */
  content: "";
  position: absolute;
  top: -28vh;
  left: 50%;
  width: 90vw;
  height: 90vh;
  transform: translateX(-50%);
  background: radial-gradient(
    closest-side,
    var(--accent-glow) 0%,
    rgba(234, 166, 77, 0.06) 42%,
    transparent 72%
  );
  filter: blur(8px);
}

.atmosphere::after {
  /* film grain */
  content: "";
  position: absolute;
  inset: -50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.035;
  mix-blend-mode: screen;
}

/* --- Layout shell ---------------------------------------------- */
.page {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  width: 100%;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

/* --- Site header ----------------------------------------------- */
.masthead {
  width: 100%;
}

.masthead .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: clamp(1.5rem, 3vw, 2.4rem);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
}

.brand__mark {
  width: 26px;
  height: 26px;
  flex: none;
}

.brand__name {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color 0.4s var(--ease);
}

.brand:hover .brand__name {
  color: var(--ink);
}

.nav {
  display: flex;
  gap: clamp(1.1rem, 2.5vw, 2.2rem);
}

.nav a {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-decoration: none;
  position: relative;
  padding-block: 0.2rem;
  transition: color 0.4s var(--ease);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}

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

.nav a:hover::after,
.nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

/* --- Hero (landing) -------------------------------------------- */
.hero {
  flex: 1 0 auto;
  display: flex;
  align-items: center;
}

.hero .shell {
  display: grid;
  gap: clamp(1.3rem, 2.4vw, 2rem);
  padding-block: clamp(1.5rem, 4vw, 3rem);
  max-width: min(940px, 92vw);
}

.headline {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 340;
  font-optical-sizing: auto;
  font-size: clamp(2.9rem, 9.5vw, 6.6rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-wrap: balance;
}

.headline em {
  font-style: italic;
  font-weight: 340;
  color: var(--accent-soft);
}

.lede {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(1.1rem, 1rem + 0.6vw, 1.45rem);
  line-height: 1.5;
  color: var(--ink-soft);
  text-wrap: balance;
}

.hero__meta {
  margin-top: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* --- Document / article pages ---------------------------------- */
.doc {
  flex: 1 0 auto;
}

.doc .shell {
  max-width: 64ch;
  padding-block: clamp(2.5rem, 7vw, 5.5rem);
}

.doc__kicker {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.1rem;
}

.doc h1 {
  font-family: var(--font-display);
  font-weight: 360;
  font-optical-sizing: auto;
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 1.6rem;
}

.doc h2 {
  font-family: var(--font-display);
  font-weight: 420;
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  letter-spacing: -0.01em;
  margin: 2.6rem 0 0.8rem;
}

.doc p,
.doc li {
  color: var(--ink-soft);
}

.doc a {
  color: var(--accent-soft);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.3s var(--ease);
}

.doc a:hover {
  color: var(--accent);
}

.doc ul {
  padding-left: 1.2rem;
}

.doc li {
  margin-block: 0.4rem;
}

.placeholder {
  display: block;
  margin-top: 2rem;
  padding: 1.1rem 1.3rem;
  border: 1px dashed var(--line-strong);
  border-radius: 12px;
  background: var(--bg-elev);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
}

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 2.4rem 0;
}

/* --- 404 -------------------------------------------------------- */
.lost {
  flex: 1 0 auto;
  display: flex;
  align-items: center;
}

.lost .shell {
  display: grid;
  gap: 1.4rem;
  padding-block: clamp(3rem, 9vw, 7rem);
  max-width: 30ch;
}

.lost .code {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(4rem, 16vw, 9rem);
  line-height: 0.9;
  color: var(--accent-soft);
  margin: 0;
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  width: max-content;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 0.25rem;
  transition: gap 0.4s var(--ease), color 0.3s var(--ease);
}

.back:hover {
  gap: 0.85rem;
  color: var(--accent-soft);
}

/* --- Footer ---------------------------------------------------- */
.foot {
  flex: none;
  border-top: 1px solid var(--line);
}

.foot .shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem 1.5rem;
  padding-block: clamp(1.6rem, 3vw, 2.2rem);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.foot a {
  color: var(--ink-faint);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

.foot a:hover {
  color: var(--ink-soft);
}

.foot__links {
  display: flex;
  gap: 1.4rem;
}

/* --- Entrance choreography ------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.9s var(--ease) forwards;
}

.reveal[data-d="1"] { animation-delay: 0.05s; }
.reveal[data-d="2"] { animation-delay: 0.18s; }
.reveal[data-d="3"] { animation-delay: 0.31s; }
.reveal[data-d="4"] { animation-delay: 0.44s; }
.reveal[data-d="5"] { animation-delay: 0.57s; }

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* --- Focus visibility ------------------------------------------ */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* --- Small screens --------------------------------------------- */
@media (max-width: 560px) {
  .masthead .shell {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .foot .shell {
    flex-direction: column;
    align-items: flex-start;
  }
}