/* Aincrad Rewritten — promo site
   Palette: night sky over the floating castle + SAO system-window language.
   Frosted white-glass panels, system amber, login-circle cyan. */

@font-face {
  font-family: "SAOUI";
  src: url("../assets/fonts/web/saoui-regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "SAOUI";
  src: url("../assets/fonts/web/saoui-bold.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "Rajdhani";
  src: url("../assets/fonts/web/rajdhani-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Rajdhani";
  src: url("../assets/fonts/web/rajdhani-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Rajdhani";
  src: url("../assets/fonts/web/rajdhani-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Source Sans 3";
  src: url("../assets/fonts/web/source-sans-400-600.woff2") format("woff2");
  font-weight: 400 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Source Sans 3";
  src: url("../assets/fonts/web/source-sans-italic-400.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

:root {
  --void: #070b13;
  --void-2: #0b1220;
  --glass: rgba(226, 237, 250, 0.05);
  --glass-2: rgba(230, 240, 252, 0.09);
  --line: rgba(168, 196, 226, 0.16);
  --line-soft: rgba(168, 196, 226, 0.09);
  --amber: #f2a340;
  --cyan: #5cc4f0;
  --ink: #e3ebf5;
  --dim: #8b9bb0;
  --display: "SAOUI", "Rajdhani", sans-serif;
  --ui: "Rajdhani", sans-serif;
  --body: "Source Sans 3", sans-serif;
}

* { box-sizing: border-box; margin: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--void);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--cyan); }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

main:focus { outline: none; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 8px 14px;
  transform: translateY(calc(-100% - 12px));
  background: var(--amber);
  color: #14100a;
  font-family: var(--ui);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}
.skip-link:focus { transform: translateY(0); }

.wrap {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- type ---------- */

h1, h2, h3 {
  font-family: var(--ui);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

h2 {
  font-family: var(--display);
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 10px 0 28px;
}

.eyebrow,
.nav-mark,
.nav-links,
.sys-head,
.hero-tag,
.btn,
.stats span,
.feed-link,
.log-signal,
.pillars dt,
.route-state {
  font-family: var(--ui);
  text-transform: uppercase;
}

.eyebrow,
.section-lede,
.stats span,
.feed-link,
.log-signal,
.log-copy,
.pillars dd,
.roadmap-lede,
.route-state,
.route li > div > p:last-child,
.footer {
  color: var(--dim);
}

.eyebrow {
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.22em;
}

.section-lede,
.roadmap-lede {
  max-width: 62ch;
}

.section-lede {
  margin-bottom: 34px;
}
.section-lede em, .section-lede strong { color: var(--ink); }

/* ---------- nav ---------- */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: linear-gradient(rgba(7, 11, 19, 0.92), rgba(7, 11, 19, 0.75) 70%, transparent);
}

.nav-mark {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.14em;
}
.nav-mark em { font-style: normal; color: var(--dim); }
.nav-nvg { height: 16px; width: auto; filter: invert(0.9); opacity: 0.85; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.1em;
}
.nav-links a { color: var(--dim); text-decoration: none; transition: color 0.15s; }
.nav-links a:hover { color: var(--ink); }
.nav-links a[aria-current="page"] { color: var(--ink); }

/* ---------- hero ---------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 110px 24px 90px;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(92, 196, 240, 0.09), transparent 60%),
    var(--void);
}

.hero-circle {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}
.hero-circle img {
  width: min(120vmin, 980px);
  opacity: 0.14;
  animation: spin 140s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hero-inner {
  position: relative;
  text-align: center;
  max-width: 760px;
  animation: rise 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
}

/* SAO system-window framing for the hero */
.sys-window {
  background: var(--glass-2);
  border-radius: 16px;
  padding: 0 48px 46px;
  backdrop-filter: blur(10px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}
.sys-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin: 0 -48px 40px;
  padding: 16px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(230, 240, 252, 0.05);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--ink);
  text-align: left;
}
.sys-head span { color: var(--dim); letter-spacing: 0.12em; }

.hero-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(3rem, 9vw, 6rem);
  line-height: 0.95;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-shadow: 0 0 50px rgba(226, 237, 250, 0.22);
}

.hero-tag {
  margin-top: 22px;
  font-weight: 500;
  font-size: clamp(1.1rem, 2.4vw, 1.45rem);
  letter-spacing: 0.03em;
  color: var(--dim);
  text-transform: none;
}
.hero-tag strong { color: var(--ink); font-weight: 700; }

.hero-copy {
  margin: 18px auto 0;
  max-width: 56ch;
  color: var(--dim);
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.landing-actions {
  align-items: center;
  gap: 14px 22px;
}
.landing-link {
  color: var(--dim);
  font-family: var(--ui);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
}
.landing-link:hover { color: var(--ink); }

.btn {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-decoration: none;
  padding: 12px 28px;
  border-radius: 3px;
  transition: background 0.15s, color 0.15s;
}
.btn-solid { background: var(--amber); color: #14100a; }
.btn-solid:hover { background: #ffbb5e; }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover { background: var(--glass-2); }

/* ---------- sections ---------- */

.section { padding: 96px 0; }
.section-alt {
  background: var(--void-2);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.sys-window,
.log-entry {
  border: 1px solid var(--line);
}

.log-entry {
  background: var(--glass);
  border-radius: 10px;
}

/* concept */

.concept-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: start;
}
.concept-text p + p { margin-top: 16px; }
.concept-text em { color: var(--amber); font-style: normal; }

.stats {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  overflow: hidden;
}
.stats li {
  background: var(--void);
  padding: 18px 22px;
  display: flex;
  align-items: baseline;
  gap: 16px;
}
.stats b {
  font-family: var(--display);
  font-size: 2rem;
  color: var(--ink);
  min-width: 2.2ch;
  text-align: right;
}
.stats span {
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
}

/* ---------- system log ---------- */

.log-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}
.log-heading .content-page-title { margin-bottom: 0; }
.feed-link {
  flex: 0 0 auto;
  margin-bottom: 5px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-decoration: none;
}
.feed-link::before { content: "◉ "; color: var(--amber); }
.feed-link:hover { color: var(--ink); }
.log-entry {
  margin-top: 32px;
  overflow: hidden;
}
.log-entry header {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 24px;
  align-items: center;
  padding: 22px 26px;
  border-bottom: 1px solid var(--line);
  background: rgba(230, 240, 252, 0.04);
}
.log-number {
  font-family: var(--display);
  font-size: 2rem;
  line-height: 1;
  color: var(--amber);
  text-decoration: none;
}
.log-signal {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.17em;
}
.log-signal time { white-space: nowrap; }
.log-entry h2 {
  margin-top: 3px;
  margin-bottom: 0;
  font-family: var(--ui);
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.log-copy {
  max-width: 68ch;
  padding: 26px;
}
.log-copy p + p { margin-top: 14px; }

/* ---------- internal pages ---------- */

.content-page {
  min-height: 100vh;
  background:
    radial-gradient(900px 520px at 50% 0, rgba(92, 196, 240, 0.06), transparent 70%),
    var(--void);
}
.content-page > .section:first-child { padding-top: 116px; }
.content-page-title {
  max-width: 15ch;
  margin: 10px 0 34px;
  font-family: var(--display);
  font-size: clamp(2.5rem, 6vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.log-page .wrap { max-width: 900px; }

.page-back {
  display: inline-block;
  margin-bottom: 42px;
  color: var(--dim);
  font-family: var(--ui);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
}
.page-back:hover { color: var(--ink); }

/* ---------- pillars ---------- */

.pillars {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 56px;
  border-top: 1px solid var(--line-soft);
}
.pillars > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-soft);
}
.pillars dt {
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.08em;
  color: var(--ink);
}
.pillars dd {
  margin: 0;
  font-size: 0.98rem;
  max-width: 46ch;
}
/* The contribute wrap is 760px, too narrow to read as two columns. */
.contribute-quiet .pillars {
  grid-template-columns: 1fr;
}

/* ---------- project backdrops ---------- */

.project-backdrop {
  position: relative;
  overflow: hidden;
}
.project-backdrop::before,
.project-backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.project-backdrop::before {
  background-image: var(--backdrop-image);
  background-position: var(--backdrop-position, center);
  background-size: cover;
  opacity: var(--backdrop-opacity, 0.36);
  filter: saturate(0.78);
  transform: scale(1.02);
}
.project-backdrop::after {
  background:
    linear-gradient(90deg, rgba(7, 11, 19, 0.97) 0%, rgba(7, 11, 19, 0.86) 45%, rgba(7, 11, 19, 0.38) 100%),
    linear-gradient(180deg, var(--void) 0%, transparent 18%, transparent 82%, var(--void) 100%);
}
.project-backdrop > .wrap {
  position: relative;
  z-index: 1;
}
.backdrop-castle {
  --backdrop-image: url("../assets/img/aincrad-castle.webp");
  --backdrop-position: center;
}

/* ---------- roadmap ---------- */

.roadmap-lede {
  font-size: 1.15rem;
  line-height: 1.7;
}

.route {
  list-style: none;
  padding: 0;
  margin-top: 44px;
  border-top: 1px solid var(--line);
}
.route li {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 28px;
  position: relative;
  padding: 26px 0;
  border-bottom: 1px solid var(--line-soft);
}
.route-marker {
  font-family: var(--display);
  font-size: 2.2rem;
  line-height: 1;
  letter-spacing: 0.04em;
  color: #4d6078;
}
.route li::before {
  content: "";
  position: absolute;
  left: 83px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line-soft);
}
.route-state {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}
.route h3 {
  margin: 3px 0 5px;
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.route li > div > p:last-child {
  max-width: 60ch;
}

/* ---------- contribute ---------- */

.contact-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 26px;
}
.contribute-quiet .wrap { max-width: 760px; }
.contribute-quiet h2 { font-size: clamp(1.5rem, 3vw, 2rem); }

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--line-soft);
  padding: 44px 0 56px;
  font-size: 0.88rem;
}
.footer p + p { margin-top: 12px; }
.footer a { color: var(--dim); }
.footer a:hover { color: var(--ink); }

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .concept-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 640px) {
  .nav { padding: 12px 16px; }
  .nav-mark { gap: 0; }
  .nav-mark span { display: none; }
  .nav-links { gap: 13px; font-size: 0.74rem; }
  .pillars { grid-template-columns: 1fr; gap: 0; }
  .project-backdrop::after {
    background:
      linear-gradient(90deg, rgba(7, 11, 19, 0.94), rgba(7, 11, 19, 0.78)),
      linear-gradient(180deg, var(--void), transparent 20%, transparent 80%, var(--void));
  }
  .sys-window { padding: 0 22px 34px; }
  .sys-head { margin: 0 -22px 30px; padding: 14px 18px; }
  .landing-actions { flex-direction: column; }
  .section { padding: 68px 0; }
  .route li { grid-template-columns: 58px 1fr; gap: 18px; }
  .route li::before { left: 55px; }
  .log-heading { align-items: start; }
  .log-entry header { grid-template-columns: 52px 1fr; gap: 16px; padding: 20px; }
  .log-copy { padding: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-circle img { animation: none; }
  .hero-inner { animation: none; }
}