/* Arcane Spire — shared site theme. Palette mirrors the in-game AppColors
   (lib/ui/kit.dart); display face is Chakra Petch, same as the game wordmark. */

:root {
  --bg:      #0B0E17;
  --bg2:     #0d1120;
  --panel:   #131A2B;
  --panel-hi:#1B2336;
  --stroke:  #273349;
  --ink:     #E7ECF5;
  --muted:   #94A3B8;
  --cyan:    #6EE7FF;
  --green:   #34D399;
  --amber:   #FCD34D;
  --gold:    #FACC15;
  --red:     #F87171;
  --violet:  #A78BFA;
  --purple:  #C084FC;
  --blue:    #60A5FA;
  --pink:    #F472B6;

  --wrap: 1120px;
  --radius: 16px;
  --font-display: 'Chakra Petch', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background-color: var(--bg);
  /* Layered nebula glows + a sparse starfield, pure CSS (no assets). */
  background-image:
    radial-gradient(1100px 620px at 78% -8%, rgba(110,231,255,0.10), transparent 60%),
    radial-gradient(900px 560px at 12% 8%, rgba(167,139,250,0.10), transparent 60%),
    radial-gradient(760px 620px at 50% 118%, rgba(52,211,153,0.08), transparent 60%),
    radial-gradient(2px 2px at 20% 30%, rgba(255,255,255,0.55), transparent 40%),
    radial-gradient(2px 2px at 68% 18%, rgba(255,255,255,0.40), transparent 40%),
    radial-gradient(1.5px 1.5px at 85% 62%, rgba(255,255,255,0.45), transparent 40%),
    radial-gradient(1.5px 1.5px at 33% 72%, rgba(255,255,255,0.35), transparent 40%),
    radial-gradient(1.5px 1.5px at 52% 44%, rgba(255,255,255,0.30), transparent 40%),
    radial-gradient(2px 2px at 8% 84%, rgba(255,255,255,0.40), transparent 40%);
  background-attachment: fixed;
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 22px; }

/* ---- top nav ---------------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,14,23,0.72);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--stroke);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700; font-size: 20px; letter-spacing: 2px;
  text-transform: uppercase; display: inline-flex; gap: 8px; align-items: center;
}
.brand .a { color: var(--gold); }
.brand .s { color: var(--cyan); }
.brand .spark { color: var(--gold); filter: drop-shadow(0 0 6px rgba(250,204,21,0.6)); }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a {
  color: var(--muted); font-size: 14px; font-weight: 600; letter-spacing: 0.3px;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); text-decoration: none; }

/* ---- buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; font-size: 14px;
  padding: 13px 24px; border-radius: 12px; border: 1px solid transparent;
  cursor: pointer; transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  color: #06210f;
  background: linear-gradient(180deg, #4ade80, #22c55e);
  box-shadow: 0 6px 22px rgba(52,211,153,0.35);
}
.btn-ghost {
  color: var(--cyan); background: rgba(110,231,255,0.06);
  border-color: rgba(110,231,255,0.45);
}
.btn-ghost:hover { background: rgba(110,231,255,0.12); }

/* ---- hero ------------------------------------------------------------- */
.hero { text-align: center; padding: 92px 0 64px; position: relative; }
.eyebrow {
  font-family: var(--font-display); text-transform: uppercase;
  letter-spacing: 6px; font-size: 13px; color: var(--muted); margin-bottom: 22px;
}
.wordmark {
  font-family: var(--font-display); font-weight: 700; text-transform: uppercase;
  letter-spacing: 6px; line-height: 1.05;
  font-size: clamp(44px, 9vw, 96px);
}
.wordmark .a { color: var(--gold); text-shadow: 0 0 34px rgba(250,204,21,0.35); }
.wordmark .s { color: var(--cyan); text-shadow: 0 0 34px rgba(110,231,255,0.35); }
.hero-sub {
  max-width: 640px; margin: 26px auto 0; color: var(--muted); font-size: 18px;
}
.hero-cta { margin-top: 38px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 16px; font-size: 13px; color: var(--muted); }

/* thin divider */
.rule { height: 1px; background: linear-gradient(90deg, transparent, var(--stroke), transparent); border: 0; margin: 8px 0; }

/* ---- generic section -------------------------------------------------- */
.section { padding: 64px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 44px; }
.section-head h2 {
  font-family: var(--font-display); text-transform: uppercase; letter-spacing: 2px;
  font-size: clamp(26px, 4vw, 36px); font-weight: 700;
}
.section-head p { color: var(--muted); margin-top: 12px; font-size: 16px; }

/* ---- cards ------------------------------------------------------------ */
.grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: linear-gradient(180deg, var(--panel), var(--bg2));
  border: 1px solid var(--stroke); border-radius: var(--radius);
  padding: 24px; transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-3px); border-color: rgba(110,231,255,0.4); box-shadow: 0 14px 34px rgba(0,0,0,0.4); }
.card .ic {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  font-size: 22px; margin-bottom: 16px; border: 1px solid var(--stroke);
}
.card h3 { font-family: var(--font-display); font-size: 18px; letter-spacing: 0.5px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15px; }

/* world chips */
.world {
  display: flex; align-items: center; gap: 14px;
  background: linear-gradient(180deg, var(--panel), var(--bg2));
  border: 1px solid var(--stroke); border-radius: 14px; padding: 16px 18px;
}
.world .dot { width: 30px; height: 30px; border-radius: 9px; flex: 0 0 auto; border: 1px solid rgba(255,255,255,0.14); }
.world .n { font-family: var(--font-display); font-weight: 600; letter-spacing: 0.4px; }
.world .d { color: var(--muted); font-size: 13px; }
.world .lock { margin-left: auto; color: var(--gold); font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; }

/* ---- footer ----------------------------------------------------------- */
.footer { border-top: 1px solid var(--stroke); margin-top: 40px; padding: 40px 0 56px; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; align-items: center; }
.footer .brand { font-size: 17px; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); font-size: 14px; font-weight: 600; }
.footer-links a:hover { color: var(--ink); text-decoration: none; }
.footer-copy { color: var(--muted); font-size: 13px; width: 100%; margin-top: 8px; }

/* ---- legal (privacy / terms) ------------------------------------------ */
.legal { padding: 56px 0 24px; }
.legal-head { max-width: 820px; margin: 0 auto 34px; }
.legal-head h1 {
  font-family: var(--font-display); text-transform: uppercase; letter-spacing: 2px;
  font-size: clamp(30px, 5vw, 46px); font-weight: 700;
}
.legal-head .updated { color: var(--muted); font-size: 14px; margin-top: 10px; }
.legal-body {
  max-width: 820px; margin: 0 auto;
  background: linear-gradient(180deg, var(--panel), var(--bg2));
  border: 1px solid var(--stroke); border-radius: var(--radius);
  padding: 34px 38px;
}
.legal-body h2 {
  font-family: var(--font-display); font-size: 20px; letter-spacing: 0.6px;
  margin: 30px 0 10px; color: var(--cyan);
}
.legal-body h2:first-child { margin-top: 0; }
.legal-body h3 { font-size: 16px; margin: 20px 0 6px; color: var(--ink); }
.legal-body p, .legal-body li { color: #cbd5e1; font-size: 15.5px; }
.legal-body p { margin: 10px 0; }
.legal-body ul { margin: 10px 0 10px 22px; }
.legal-body li { margin: 6px 0; }
.legal-body strong { color: var(--ink); }
.legal-body a { color: var(--cyan); }
.legal-note {
  max-width: 820px; margin: 18px auto 0; font-size: 13px; color: var(--muted);
  border-left: 2px solid var(--stroke); padding-left: 14px;
}

/* ---- hero scene (real game art) --------------------------------------- */
.hero { position: relative; overflow: hidden; padding: 74px 0 78px; }
.hero-bg { position: absolute; inset: 0; z-index: -2;
  background: url('assets/worlds/core.png') center top / cover no-repeat; opacity: 0.5; }
.hero-bg::after { content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,14,23,0.55) 0%, rgba(11,14,23,0.80) 58%, var(--bg) 100%); }
.hero-glow { position: absolute; z-index: -2; width: 620px; height: 620px; left: 50%; top: -140px;
  transform: translateX(-50%); border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle, rgba(250,204,21,0.16), transparent 62%); }

.hero-logo { width: 108px; height: 108px; border-radius: 26px; margin: 0 auto 20px; display: block;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.12), 0 18px 54px rgba(250,204,21,0.30);
  animation: bob 6s ease-in-out infinite; }
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

/* floating planet-turrets pulled from the game */
.orbit { position: absolute; z-index: -1; pointer-events: none; }
.orbit img { width: 100%; height: auto; display: block; }
.orbit.p1 { width: 132px; top: 14%; left: 5%;  filter: drop-shadow(0 0 26px rgba(250,204,21,0.35)); animation: floatA 9s ease-in-out infinite; }
.orbit.p2 { width: 96px;  top: 24%; right: 7%; filter: drop-shadow(0 0 24px rgba(110,231,255,0.35)); animation: floatB 11s ease-in-out infinite; }
.orbit.p3 { width: 74px;  bottom: 12%; left: 13%; filter: drop-shadow(0 0 20px rgba(167,139,250,0.35)); animation: floatB 13s ease-in-out infinite; }
.orbit.p4 { width: 66px;  bottom: 20%; right: 14%; filter: drop-shadow(0 0 20px rgba(52,211,153,0.35)); animation: floatA 12s ease-in-out infinite; }
@keyframes floatA { 0%,100% { transform: translateY(0) rotate(0); } 50% { transform: translateY(-22px) rotate(6deg); } }
@keyframes floatB { 0%,100% { transform: translateY(0) rotate(0); } 50% { transform: translateY(18px) rotate(-5deg); } }
@media (prefers-reduced-motion: reduce) { .hero-logo, .orbit { animation: none !important; } }

.badges { margin-top: 22px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.chip { font-family: var(--font-display); font-size: 12px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--muted); border: 1px solid var(--stroke); border-radius: 999px; padding: 7px 14px;
  background: rgba(19,26,43,0.6); }

/* ---- world thumbnail cards (real backgrounds) ------------------------- */
.worlds-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.world-card { position: relative; aspect-ratio: 4 / 5; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--stroke); background-size: cover; background-position: center;
  display: flex; align-items: flex-end; transition: transform .15s ease, border-color .15s ease; }
.world-card:hover { transform: translateY(-4px); border-color: rgba(110,231,255,0.5); }
.world-card::before { content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 38%, rgba(11,14,23,0.92)); }
.world-card .label { position: relative; padding: 13px 14px; width: 100%; }
.world-card .n { font-family: var(--font-display); font-weight: 700; letter-spacing: 0.4px; font-size: 15px; }
.world-card .d { color: var(--muted); font-size: 12px; }
.world-card .prem { position: absolute; top: 10px; right: 10px; z-index: 2;
  font-size: 10px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: #221a02;
  background: var(--gold); border-radius: 6px; padding: 3px 8px; }

/* ---- preview band (phone mockup, real art) ---------------------------- */
.preview { display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: center; }
.preview .copy h2 { font-family: var(--font-display); text-transform: uppercase; letter-spacing: 2px;
  font-size: clamp(26px, 4vw, 36px); }
.preview .copy p { color: var(--muted); margin: 14px 0; font-size: 16px; max-width: 46ch; }
.preview .copy .list { list-style: none; margin-top: 16px; }
.preview .copy .list li { padding: 7px 0 7px 26px; position: relative; color: #cbd5e1; }
.preview .copy .list li::before { content: '▸'; position: absolute; left: 0; color: var(--cyan); }
.device { justify-self: center; width: 300px; padding: 12px; border-radius: 38px;
  background: linear-gradient(180deg, #0e1424, #05070d); border: 1px solid var(--stroke);
  box-shadow: 0 34px 90px rgba(0,0,0,0.6), inset 0 0 0 1px rgba(255,255,255,0.04); }
.device .screen { position: relative; border-radius: 27px; overflow: hidden; aspect-ratio: 9 / 19.5;
  background: #05070d url('assets/worlds/skyport.png') center / cover; }
.device .screen::after { content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,14,23,0.15), rgba(11,14,23,0.55)); }
.device .scr-title { position: absolute; top: 16px; left: 0; right: 0; z-index: 2; text-align: center;
  font-family: var(--font-display); font-weight: 700; letter-spacing: 3px; font-size: 15px; }
.device .scr-title .a { color: var(--gold); } .device .scr-title .s { color: var(--cyan); }
.device .turret { position: absolute; z-index: 2; left: 16px; width: 46px; filter: drop-shadow(0 0 10px rgba(250,204,21,0.4)); }
.device .turret img { width: 100%; display: block; }
.device .t1 { top: 34%; } .device .t2 { top: 50%; left: 24px; } .device .t3 { top: 66%; }
.device .beam { position: absolute; z-index: 1; height: 3px; border-radius: 3px;
  background: linear-gradient(90deg, var(--cyan), transparent); box-shadow: 0 0 8px var(--cyan); }
.device .b1 { top: calc(34% + 22px); left: 60px; width: 120px; }
.device .b2 { top: calc(66% + 22px); left: 60px; width: 90px; }
.device .notch { position: absolute; z-index: 3; top: 8px; left: 50%; transform: translateX(-50%);
  width: 82px; height: 6px; border-radius: 4px; background: rgba(255,255,255,0.14); }

/* ---- responsive ------------------------------------------------------- */
@media (max-width: 900px) {
  .worlds-grid { grid-template-columns: repeat(2, 1fr); }
  .preview { grid-template-columns: 1fr; gap: 30px; }
  .preview .copy { text-align: center; }
  .preview .copy p { margin-left: auto; margin-right: auto; }
  .preview .copy .list { display: inline-block; text-align: left; }
  .orbit.p2, .orbit.p4 { display: none; }
}
@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 13px; }
  .grid-4 { grid-template-columns: 1fr; }
  .hero { padding: 60px 0 40px; }
  .legal-body { padding: 24px 20px; }
  .brand { font-size: 17px; }
}