/* Simple Chess — constructivist chess-campaign poster.
   Own-world: vermillion / warm ink / aged paper. One condensed grotesque.
   Flat fields, hard edges, offset print blocks. No gradients, no glass. */

@font-face {
  font-family: "Oswald";
  src: url("fonts/oswald-latin.woff2") format("woff2");
  font-weight: 200 700;
  font-display: swap;
}

:root {
  --red: #c63a21;
  --red-deep: #a92e18;
  --ink: #191410;
  --paper: #f2e6c8;
  --paper-dim: #e5d6b2; /* tinted secondary surface, never gray */
  --ink-soft: #4c4237; /* secondary text on paper */
  --paper-soft: #e8cfb4; /* secondary text on red — tinted, not gray */
  --light-sq: #ecdfbe;
  --dark-sq: #b0562e;
  --hl-from: rgba(198, 58, 33, 0.34);
  --hl-to: rgba(198, 58, 33, 0.5);
  --hl-dot: rgba(25, 20, 16, 0.38);
  --hl-check: rgba(198, 58, 33, 0.85);
  --shadow: 4px 4px 0 var(--ink);
  --display: "Oswald", "Arial Narrow", sans-serif;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
/* Night play: ink ground, paper type, same red. Same world after dark. */
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #221c15;
    --paper-dim: #2e261c;
    --ink: #f2e6c8;
    --ink-soft: #cbbb97;
    --paper-soft: #e8cfb4;
    --light-sq: #cdbd97;
    --dark-sq: #97431f;
    --shadow: 4px 4px 0 rgba(0, 0, 0, 0.55);
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
}
section { width: 100%; }

/* ---------- The poster (landing / waiting / joining) ---------- */
#landing, #waiting, #joining { flex: 1; display: flex; }
.poster {
  position: relative;
  overflow: hidden;
  background: var(--red);
  color: var(--paper);
  width: 100%;
  min-height: 100dvh;
  padding: clamp(20px, 5vw, 56px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 20px;
}
@media (prefers-color-scheme: dark) {
  .poster { color: #f2e6c8; }
}
.wedge {
  position: absolute;
  top: -12vh;
  right: -28vw;
  width: 75vw;
  height: 55vh;
  background: #191410;
  transform: rotate(18deg);
  pointer-events: none;
}
.mark {
  position: absolute;
  right: max(3vw, 10px);
  top: 3vh;
  width: clamp(120px, 30vw, 400px);
  transform: rotate(-6deg);
  pointer-events: none;
}
.mark svg { width: 100%; height: auto; filter: none; }

.masthead { position: relative; z-index: 1; }
h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(3.2rem, 14vw, 6rem);
  line-height: 0.92;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin: 0 0 14px;
}
.tagline {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(1.05rem, 3.6vw, 1.4rem);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.45;
  color: var(--paper-soft);
  margin: 0;
  max-width: 30ch;
}
.poster-h2 {
  position: relative;
  z-index: 1;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.4rem, 9vw, 4.2rem);
  line-height: 0.95;
  text-transform: uppercase;
  margin: 0;
}
.explain {
  position: relative;
  z-index: 1;
  font-family: var(--display);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.5;
  color: var(--paper-soft);
  margin: 0;
}

/* Paper control panel on the red field */
.panel {
  position: relative;
  z-index: 1;
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 460px;
}
.tc-set { border: none; margin: 0; padding: 0; }
.tc-set legend {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.8rem;
  color: var(--ink-soft);
  padding: 0 0 8px;
}
.tc-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.tc {
  font-family: var(--display);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.95rem;
  line-height: 1.1;
  padding: 10px 2px;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
}
.tc small { font-size: 0.65rem; letter-spacing: 0.06em; color: var(--ink-soft); }
.tc.selected { background: var(--ink); color: var(--paper); }
.tc.selected small { color: var(--paper-soft); }
.tc:hover:not(.selected) { background: var(--paper-dim); }

/* Print-block buttons */
button { font: inherit; cursor: pointer; border-radius: 0; }
.block-btn {
  font-family: var(--display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 1rem;
  padding: 12px 18px;
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
  transition: transform 0.06s ease-out, box-shadow 0.06s ease-out;
}
.block-btn:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--ink); }
.block-btn:active { transform: translate(3px, 3px); box-shadow: 1px 1px 0 var(--ink); }
.block-btn.primary { background: var(--ink); color: var(--paper); }
.block-btn.big { font-size: 1.25rem; padding: 16px 20px; }
#waiting .block-btn { box-shadow: 4px 4px 0 rgba(0,0,0,0.45); border-color: var(--ink); }
.quiet-btn {
  position: relative;
  z-index: 1;
  background: none;
  border: none;
  color: var(--paper-soft);
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 10px;
  align-self: center;
}
.quiet-btn:hover { color: var(--paper); }
#game .quiet-btn { color: var(--ink-soft); }
#game .quiet-btn:hover { color: var(--ink); }

.fineprint {
  position: relative;
  z-index: 1;
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  color: var(--paper-soft);
  margin: 0;
}

/* Waiting screen pieces */
.qr {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}
.qr svg {
  width: min(62vw, 260px);
  height: auto;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
  background: #fff;
}
.linkbox {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 10px;
  max-width: 460px;
  width: 100%;
  align-self: center;
}
.linkbox input {
  flex: 1;
  min-width: 0;
  font-family: var(--body);
  font-size: 0.9rem;
  padding: 12px;
  border: 3px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
}
#waiting .poster { align-items: center; text-align: center; }
#joining .poster { align-items: center; text-align: center; }
.status-line {
  position: relative;
  z-index: 1;
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--paper);
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}
.pulse {
  width: 12px; height: 12px;
  background: var(--paper);
  animation: stamp 1s steps(2, jump-none) infinite;
}
@keyframes stamp { 50% { opacity: 0.2; } }

/* ---------- The game — quiet paper board ---------- */
#game { padding: 12px 16px 20px; }
.game-layout {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: min(92vw, calc(100dvh - 220px), 640px);
  margin: 0 auto;
}
#board-wrap { position: relative; width: 100%; }
#board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  width: 100%;
  aspect-ratio: 1;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.sq { position: relative; display: flex; align-items: center; justify-content: center; }
.sq.light { background: var(--light-sq); }
.sq.dark { background: var(--dark-sq); }
.sq.hl-from { background-image: linear-gradient(var(--hl-from), var(--hl-from)); }
.sq.hl-to { background-image: linear-gradient(var(--hl-to), var(--hl-to)); }
.sq.hl-check { background-image: radial-gradient(var(--hl-check), transparent 72%); }
.sq.hl-dest::after {
  content: "";
  position: absolute;
  width: 26%; height: 26%;
  background: var(--hl-dot);
}
.sq.hl-dest.has-piece::after {
  width: 100%; height: 100%;
  background: transparent;
  border: 4px solid var(--hl-dot);
}
.sq .coord {
  position: absolute;
  font-family: var(--display);
  font-size: clamp(8px, 1.7vw, 12px);
  font-weight: 600;
  opacity: 0.6;
  pointer-events: none;
}
.sq .coord.file { right: 3px; bottom: 1px; }
.sq .coord.rank { left: 3px; top: 1px; }
.piece { width: 88%; height: 88%; pointer-events: none; }
.piece.dragging { opacity: 0.3; }
#drag-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 50;
  width: 64px; height: 64px;
  transform: translate(-50%, -55%);
}

/* Clocks: flat print blocks; the running clock turns red. */
.clock-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.player-tag {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.clock {
  font-family: var(--display);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1;
  padding: 6px 12px;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  min-width: 5.2ch;
  text-align: center;
}
.clock.active { background: var(--red); border-color: var(--red-deep); color: #f2e6c8; }
.clock.low { background: var(--ink); border-color: var(--ink); color: #f2e6c8; }
.clock.hidden { visibility: hidden; }

.under-board {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.under-board .spacer { flex: 1; }
.conn { color: var(--red); transition: color 0.3s; font-size: 0.8rem; }
.conn.ok { color: #2c6e31; }
.conn.relay { color: #a96f14; }
.mini {
  font-family: var(--display);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--ink);
  padding: 6px 12px;
  font-size: 0.8rem;
}
.mini:hover { background: var(--paper-dim); }
.mini.danger { color: var(--red-deep); border-color: var(--red-deep); }
.mini.danger:hover { background: var(--red); border-color: var(--red); color: #f2e6c8; }

.movelist {
  font-family: var(--body);
  font-size: 0.85rem;
  color: var(--ink-soft);
  line-height: 1.7;
  max-height: 66px;
  overflow-y: auto;
  padding: 0 2px;
}
.movelist b { color: var(--ink); font-weight: 700; }

/* Promotion picker */
.promo {
  position: absolute;
  inset: 0;
  background: rgba(25, 20, 16, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  z-index: 20;
}
.promo button {
  width: 18%;
  aspect-ratio: 1;
  background: var(--paper);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
}
.promo button:hover { background: var(--paper-dim); }
.promo button .piece, .promo button svg { width: 90%; height: 90%; }

/* End-of-game overlay */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(25, 20, 16, 0.45);
  z-index: 30;
}
.overlay-card {
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--ink);
  box-shadow: 6px 6px 0 var(--ink);
  padding: 24px 30px;
  text-align: center;
  max-width: 86%;
}
.overlay-card h3 {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 1.7rem;
  line-height: 1.05;
  margin: 0 0 6px;
}
.overlay-card p {
  margin: 0 0 16px;
  color: var(--ink-soft);
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.9rem;
}
.overlay-buttons { display: flex; gap: 12px; justify-content: center; align-items: center; }

#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--paper);
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 10px 18px;
  font-size: 0.9rem;
  z-index: 100;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.4);
}
@media (prefers-color-scheme: dark) {
  #toast { background: #f2e6c8; color: #191410; border-color: #191410; }
}

/* Focus: visible everywhere, in-world */
:focus-visible { outline: 3px solid var(--red); outline-offset: 2px; }
.poster :focus-visible { outline-color: var(--paper); }

/* Larger screens: poster becomes a broadside, game centers */
@media (min-width: 700px) {
  .poster { align-items: flex-start; padding-top: 10vh; }
  #waiting .poster, #joining .poster { align-items: center; }
  .panel { min-width: 420px; }
}
@media (prefers-reduced-motion: reduce) {
  .pulse { animation: none; }
  .block-btn { transition: none; }
}

/* The masses: a frieze of pawns along the poster baseline. */
.frieze {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  display: flex;
  justify-content: center;
  gap: 0;
  pointer-events: none;
}
.frieze svg { width: clamp(34px, 7vw, 64px); height: auto; flex: none; }
@media (max-width: 700px) { .frieze svg:nth-child(n+9) { display: none; } }

/* Account row + optional sign-in */
.account-row {
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  color: var(--paper-soft);
  display: flex;
  align-items: center;
  gap: 4px;
}
.account-row .quiet-btn { padding: 4px 6px; font-size: 0.8rem; align-self: auto; }
.account-row b { color: var(--paper); }
#account-info { display: inline-flex; align-items: center; gap: 4px; }

.auth-panel {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(25, 20, 16, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.auth-card { width: 100%; max-width: 380px; text-align: left; }
.auth-title {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 1.3rem;
  margin: 0;
}
.auth-sub { margin: 0 0 4px; color: var(--ink-soft); font-size: 0.85rem; }
.auth-card input {
  font: inherit;
  padding: 10px 12px;
  border: 3px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  width: 100%;
}
.auth-error { margin: 0; color: var(--red-deep); font-size: 0.85rem; font-weight: 600; }
.auth-card .quiet-btn { color: var(--ink-soft); }

/* Move review */
.mini.live { background: var(--red); border-color: var(--red-deep); color: #f2e6c8; }
.movelist .mv { cursor: pointer; padding: 1px 2px; }
.movelist .mv:hover { background: var(--paper-dim); }
.movelist .mv.current { background: var(--ink); color: var(--paper); }