/* ECHO//CITY — visual last-one-standing arena */
:root {
  --bg: #07060A;
  --bg2: #0E0D14;
  --ink: #F3F0E8;
  --mut: #8E8A9A;
  --line: #2A2736;
  --panel: rgba(10, 9, 16, 0.82);
  --amber: #E8A54B;
  --amber-dim: rgba(232, 165, 75, 0.2);
  --cyan: #4ED6C8;
  --ember: #C4473A;
  --ok: #7DDB8A;
  --danger: #E07068;
  --display: "Shippori Mincho", "Times New Roman", serif;
  --sans: Inter, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 var(--sans);
  overflow: hidden;
}
body {
  background:
    radial-gradient(ellipse 900px 520px at 12% -8%, rgba(232, 165, 75, 0.10), transparent 55%),
    radial-gradient(ellipse 700px 400px at 88% 100%, rgba(196, 71, 58, 0.08), transparent 50%),
    var(--bg);
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 2;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

#city {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--bg);
  padding: 8px 12px;
  z-index: 100;
}
.skip:focus { left: 8px; top: 8px; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px clamp(12px, 3vw, 28px);
  background: linear-gradient(180deg, rgba(7,6,10,0.92), rgba(7,6,10,0.35) 70%, transparent);
  pointer-events: none;
}
.topbar a, .topbar button { pointer-events: auto; }
.brand { display: flex; align-items: center; gap: 12px; pointer-events: auto; }
.mark {
  font: 700 26px/1 var(--display);
  color: var(--amber);
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  background: var(--bg2);
}
.kicker {
  margin: 0;
  font: 500 10px/1 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}
.brand h1 {
  margin: 3px 0 0;
  font: 700 16px/1 var(--display);
  letter-spacing: 0.04em;
}
.hud-stats {
  display: flex;
  gap: 18px;
  font-family: var(--mono);
  font-size: 12px;
}
.hud-stats .lab {
  color: var(--mut);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-right: 6px;
  font-size: 10px;
}
.hud-stats strong { color: var(--amber); font-weight: 500; }
.topnav { font: 500 12px/1 var(--mono); pointer-events: auto; }
.topnav a { color: var(--mut); text-decoration: none; padding: 4px; }
.topnav a:hover, .topnav a:focus-visible { color: var(--cyan); }
.topnav .sep { color: var(--line); margin: 0 4px; }

.killfeed {
  position: fixed;
  top: 72px;
  right: 16px;
  z-index: 5;
  width: min(280px, 42vw);
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: none;
}
.killfeed .item {
  background: rgba(10, 9, 16, 0.78);
  border-left: 2px solid var(--ember);
  padding: 8px 10px;
  font: 12px/1.35 var(--mono);
  color: var(--ink);
  animation: feedIn 0.45s var(--ease-out) both;
}
.killfeed .item strong { color: var(--amber); }
.killfeed .item .loser { color: var(--danger); text-decoration: line-through; }
@keyframes feedIn {
  from { opacity: 0; transform: translateX(12px); }
  to { opacity: 1; transform: none; }
}

.overlay {
  position: fixed;
  z-index: 8;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(560px, calc(100% - 28px));
  max-height: min(86vh, 720px);
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--amber);
  padding: clamp(20px, 4vw, 32px);
  backdrop-filter: blur(16px);
  box-shadow: 0 40px 100px rgba(0,0,0,0.55);
  animation: panelIn 0.65s var(--ease-out) both;
}
.overlay[hidden] { display: none !important; }
.overlay.proof { border-top-color: var(--cyan); width: min(640px, calc(100% - 28px)); }
.overlay.champ { text-align: center; border-top-color: var(--ok); }
@keyframes panelIn {
  from { opacity: 0; transform: translate(-50%, -46%); }
  to { opacity: 1; transform: translate(-50%, -50%); }
}

.eyebrow {
  margin: 0 0 10px;
  font: 500 11px/1 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mut);
}
.eyebrow.amber { color: var(--amber); }
.eyebrow.cyan { color: var(--cyan); }

h2 {
  margin: 0 0 12px;
  font: 700 clamp(26px, 5vw, 38px)/1.12 var(--display);
}
.lede { color: var(--mut); margin: 0 0 22px; }
.hint, .disclaimer { color: var(--mut); font-size: 13px; margin: 12px 0 0; }
.mono { font-family: var(--mono); font-size: 12px; }
.hash { word-break: break-all; color: var(--cyan); margin: 12px 0 20px; }

.gate-form label {
  display: block;
  font: 500 12px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mut);
  margin-bottom: 10px;
}
.gate-row { display: flex; gap: 10px; flex-wrap: wrap; }
input[type="text"], #share-url {
  flex: 1 1 180px;
  min-width: 0;
  background: var(--bg2);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 12px 14px;
  font: 15px/1.3 var(--sans);
  outline: none;
}
input:focus-visible, #share-url:focus-visible {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(78,214,200,0.2);
}

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--bg2);
  color: var(--ink);
  font: 600 12px/1 var(--sans);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 13px 16px;
  cursor: pointer;
  min-height: 44px;
  transition: border-color 0.2s, background 0.2s, transform 0.2s var(--ease-out);
}
.btn:hover { border-color: var(--mut); }
.btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }
.btn.primary {
  background: linear-gradient(180deg, #1a1810, #12100c);
  border-color: var(--amber);
  color: var(--amber);
}
.btn.primary:hover { background: var(--amber-dim); transform: translateY(-1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.error { margin-top: 12px; color: var(--danger); font-size: 14px; }
.status {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9;
  padding: 10px 14px;
  border: 1px solid var(--line);
  background: rgba(10,9,16,0.92);
  font: 12px/1.4 var(--mono);
  color: var(--cyan);
  max-width: min(90vw, 480px);
}
.status[data-kind="error"] { color: var(--danger); }

.banner {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 7;
  margin: 0;
  padding: 10px 18px;
  background: rgba(10,9,16,0.85);
  border: 1px solid var(--line);
  border-top: 2px solid var(--ember);
  font: 700 15px/1.3 var(--display);
  text-align: center;
  max-width: min(90vw, 520px);
  animation: panelIn 0.4s var(--ease-out) both;
}

.champ-card {
  display: flex;
  gap: 16px;
  text-align: left;
  padding: 14px;
  border: 1px solid var(--line);
  background: rgba(7,6,10,0.55);
  margin: 0 auto 22px;
  max-width: 360px;
}
.champ-card .portrait {
  width: 80px; height: 80px;
  border: 1px solid var(--line);
  background: var(--bg2);
  flex-shrink: 0;
}
.traits { margin: 8px 0 0; display: grid; gap: 4px; }
.traits > div {
  display: grid;
  grid-template-columns: 56px 1fr 36px;
  gap: 6px;
  align-items: center;
  font-size: 11px;
}
.traits dt { margin: 0; color: var(--mut); font-family: var(--mono); font-size: 10px; text-transform: uppercase; }
.traits .bar { height: 4px; background: var(--line); }
.traits .bar > i { display: block; height: 100%; background: var(--cyan); width: 0; transition: width 0.5s var(--ease-out); }
.traits dd { margin: 0; font-family: var(--mono); text-align: right; }

.explain { margin: 0 0 20px; padding-left: 1.1em; color: var(--mut); }
.explain li { margin-bottom: 6px; }
.explain li::marker { color: var(--cyan); }
.subhead { margin: 0 0 10px; font: 700 16px/1.2 var(--display); }
.table-wrap { overflow-x: auto; margin-bottom: 16px; border: 1px solid var(--line); }
.event-table { width: 100%; border-collapse: collapse; font: 12px/1.4 var(--mono); }
.event-table th, .event-table td {
  text-align: left; padding: 7px 9px; border-bottom: 1px solid var(--line); vertical-align: top;
}
.event-table th {
  color: var(--mut); font-weight: 500; text-transform: uppercase;
  letter-spacing: 0.06em; font-size: 10px; background: rgba(7,6,10,0.7);
}
.event-table .loser { color: var(--danger); }
.event-table .winner { color: var(--ok); }
.share-row { margin-bottom: 18px; }
.share-row label {
  display: block; margin-bottom: 8px;
  font: 500 11px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut);
}
.proof-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }

@media (max-width: 640px) {
  .topnav { display: none; }
  .hud-stats { gap: 10px; font-size: 11px; }
  .killfeed { width: min(220px, 48vw); top: 64px; right: 8px; }
  .overlay { max-height: 78vh; top: auto; bottom: 12px; transform: translate(-50%, 0); }
  @keyframes panelIn {
    from { opacity: 0; transform: translate(-50%, 16px); }
    to { opacity: 1; transform: translate(-50%, 0); }
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .noise { display: none; }
}