/* Gravity Drift — art direction: neon arcade, deep space, Orbitron display type. */
@font-face {
  font-family: "Orbitron";
  src: url("./orbitron.woff2") format("woff2");
  font-weight: 400 900;
  font-display: swap;
}

:root {
  --bg: #050218;
  --panel: rgba(10, 7, 34, 0.78);
  --line: #2a2560;
  --line-soft: #1b1745;
  --cyan: #4fd8ff;
  --cyan-soft: #9be8ff;
  --magenta: #ff4fd8;
  --text: #dfe8ff;
  --dim: #8b90c9;
  --danger: #ff5a6e;
  --radius: 12px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; height: 100%; overflow: hidden; background: var(--bg); }
body {
  font-family: "Orbitron", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  user-select: none;
  -webkit-user-select: none;
  /* container of the layout ladder (ancestors respond; #app itself is a child) */
  container-type: size;
  container-name: app;
}

#app {
  position: fixed; inset: 0;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: minmax(0, 1fr);
  grid-template-areas: "stage";
  overflow: hidden;
}
#app.playing {
  grid-template-rows: auto minmax(0, 1fr);
  grid-template-areas: "chrome" "stage";
}
/* ---- width ladder: container queries on #app (layout reacts to the BOX the
   game lives in — pane, window, or phone — not the viewport) ---- */

/* Mode P/N: narrow container (<= 860px), any pointer: HUD strip on top,
   well full-width below. Dock is added for touch only, further down. */
@container app (max-width: 860px) {
  #app.playing {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto minmax(0, 1fr);
    grid-template-areas: "chrome" "rail" "stage";
  }
  #app.playing .rail {
    flex-direction: row; flex-wrap: wrap; align-items: flex-start;
    padding: 8px; gap: 8px;
  }
  .rail .panel { padding: 8px; min-width: 0; }
  .rail .next canvas { width: 44px; height: 44px; }
  .stat b { font-size: 14px; }
}
/* Mode D: wide container + fine pointer: classic left rail */
@container app (min-width: 861px) {
  #app.playing {
    grid-template-columns: minmax(176px, 210px) minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr);
    grid-template-areas: "chrome chrome" "rail stage";
  }
}
/* ---- pointer rules: touch adds a dock + touch geometry; layout untouched ---- */
@media (pointer: coarse) {
  #app.playing .dock {
    display: grid; grid-area: dock;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    padding: 8px 12px max(10px, env(safe-area-inset-bottom, 0px));
    background: rgba(6, 4, 26, .9);
    border-top: 1px solid var(--line-soft);
    z-index: 20;
    pointer-events: auto;
    position: relative;
  }
  /* T1 phone portrait: stacked, dock at the bottom */
  @container app (max-width: 640px) {
    #app.playing {
      grid-template-columns: minmax(0, 1fr);
      grid-template-rows: auto auto minmax(0, 1fr) auto;
      grid-template-areas: "chrome" "rail" "stage" "dock";
    }
    /* compact mobile HUD: smaller panels free vertical space for the well */
    #app.playing .rail { padding: 4px; gap: 4px; }
    .rail .panel { padding: 4px 6px; }
    .rail .next { gap: 3px; }
    .rail .next h2 { font-size: 7px; letter-spacing: .26em; }
    .rail .next canvas { width: 30px; height: 30px; }
    .stats { gap: 3px 8px; }
    .stat label { font-size: 7px; letter-spacing: .22em; }
    .stat b { font-size: 12px; }
    .panel { border-radius: 9px; }
  }
  /* T2 phone landscape / wide touch: rail column left, dock full-width under the well */
  @container app (min-width: 641px) {
    #app.playing {
      grid-template-columns: minmax(150px, 200px) minmax(0, 1fr);
      grid-template-rows: auto minmax(0, 1fr) auto;
      grid-template-areas: "chrome chrome" "rail stage" "dock dock";
    }
    #app.playing .rail { flex-direction: column; flex-wrap: nowrap; }
    .rail .next canvas { width: 48px; height: 48px; }
  }
}

/* ---------- chrome bar ---------- */
.chrome {
  grid-area: chrome;
  display: none;
  align-items: center; justify-content: space-between;
  padding: 8px 14px;
  background: linear-gradient(180deg, rgba(8,5,28,.92), rgba(8,5,28,.55));
  border-bottom: 1px solid var(--line-soft);
  z-index: 8;
}
#app.playing .chrome { display: flex; }
.brand {
  font-size: 12px; font-weight: 800; letter-spacing: .38em; white-space: nowrap;
  background: linear-gradient(90deg, #7df9ff, #ff9de2);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.chrome-actions { display: flex; gap: 8px; }
.icon-btn, .pause-btn {
  font: inherit; font-size: 11px; font-weight: 700; letter-spacing: .18em;
  color: var(--cyan-soft);
  background: rgba(79, 216, 255, 0.06);
  border: 1px solid rgba(79, 216, 255, 0.25);
  border-radius: 8px; padding: 6px 12px; cursor: pointer;
  transition: all .15s;
}
.icon-btn { padding: 6px 10px; }
.icon-btn:hover, .pause-btn:hover { background: rgba(79, 216, 255, 0.14); box-shadow: 0 0 12px rgba(79,216,255,.25); }
.icon-btn.off { color: var(--dim); border-color: var(--line); text-decoration: line-through; }

/* ---------- side rail ---------- */
.rail {
  grid-area: rail;
  display: none;
  flex-direction: column; gap: 10px;
  padding: 12px;
  z-index: 6;
}
#app.playing .rail { display: flex; }
@media (max-width: 820px), (pointer: coarse) { .rail { flex-direction: row; } }
.panel {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 12px;
  backdrop-filter: blur(6px);
}
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 10px; }
.stat label { display: block; font-size: 8.5px; letter-spacing: .3em; color: var(--dim); }
.stat b { font-size: 17px; letter-spacing: .06em; color: var(--cyan-soft); text-shadow: 0 0 8px rgba(123, 229, 255, .35); }
.next { display: flex; flex-direction: column; gap: 8px; align-items: center; }
.next h2 { margin: 0; font-size: 9px; letter-spacing: .34em; color: var(--dim); font-weight: 600; }
.next canvas { width: 62px; height: 62px; }

/* ---------- stage ---------- */
.stage { grid-area: stage; position: relative; min-width: 0; min-height: 0; }
#well {
  /* full-bleed: the starfield canvas IS the page background; the well centers
     inside the free stage area via the renderer's origin uniform */
  position: fixed; inset: 0; width: 100%; height: 100%; display: block;
  z-index: 0;
}
.help {
  position: absolute; left: 14px; bottom: 12px; margin: 0;
  font-size: 10.5px; line-height: 1.7; color: var(--dim);
  text-shadow: 0 1px 3px #000;
  z-index: 4; pointer-events: none;
}
kbd {
  font-family: inherit; font-size: 9.5px; font-weight: 700;
  color: var(--cyan-soft);
  border: 1px solid rgba(123, 229, 255, .3); border-bottom-width: 2px;
  border-radius: 4px; padding: 1px 5px;
  background: rgba(79, 216, 255, .05);
}
.gpu-error {
  position: absolute; inset: 0; z-index: 30;
  display: flex; align-items: center; justify-content: center;
  padding: 24px; text-align: center;
  font-size: 15px; line-height: 1.6; color: var(--danger);
  background: radial-gradient(circle at 50% 45%, #170b2e, #050218 75%);
}
.gpu-error.hidden { display: none; }
#combo-pop { display: none; }

/* ---------- touch dock ---------- */
/* display rule now lives in the pointer:coarse container block at the top of
   this file (dock shows on touch devices only, in both container widths). */
.dock { display: none; }
.dock button {
  font: inherit; font-size: 15px; font-weight: 800; letter-spacing: .1em;
  color: var(--cyan-soft);
  background: linear-gradient(180deg, rgba(79,216,255,.10), rgba(79,216,255,.03));
  border: 1px solid rgba(79, 216, 255, .3);
  border-radius: 12px; padding: 15px 0; cursor: pointer;
  transition: transform .06s, background .12s;
  touch-action: manipulation;
}
.dock button:active { transform: scale(.94); background: rgba(79,216,255,.22); }
.dock button:nth-child(4), .dock button:nth-child(5) { font-size: 12px; color: #ffd9f4; border-color: rgba(255,79,216,.35); background: linear-gradient(180deg, rgba(255,79,216,.10), rgba(255,79,216,.03)); }
.dock button:nth-child(4):active, .dock button:nth-child(5):active { background: rgba(255,79,216,.22); }

/* ---------- menu ---------- */
.menu {
  position: fixed; inset: 0; z-index: 20;
  display: flex; align-items: center; justify-content: center;
  padding: 18px;
  background: radial-gradient(ellipse at 50% 42%, rgba(23, 11, 46, .55), rgba(5, 2, 24, .93) 78%);
}
.menu.hidden { display: none; }
.menu-scan {
  position: absolute; inset: 0; pointer-events: none; opacity: .12;
  background: repeating-linear-gradient(0deg, transparent 0 3px, rgba(123, 229, 255, .12) 3px 4px);
  animation: scan 9s linear infinite;
}
@keyframes scan { to { background-position: 0 120px; } }
.menu-card {
  width: min(430px, 94vw);
  max-height: 92vh; overflow-y: auto;
  background: rgba(9, 6, 30, .88);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px 26px 22px;
  box-shadow: 0 0 60px rgba(80, 40, 180, .25), inset 0 0 40px rgba(60, 30, 140, .08);
  backdrop-filter: blur(10px);
  animation: cardIn .28s cubic-bezier(.2, 1.4, .4, 1);
}
@keyframes cardIn { from { transform: translateY(14px) scale(.97); opacity: 0; } }
.menu-card.hidden { display: none; }
.menu-kicker { margin: 0 0 4px; font-size: 9px; letter-spacing: .5em; color: var(--magenta); font-weight: 700; }
.menu-card h1 {
  margin: 0 0 6px; font-size: clamp(26px, 6.5vw, 34px); font-weight: 900; letter-spacing: .1em; line-height: 1.05;
  background: linear-gradient(100deg, #7df9ff 20%, #ff9de2 80%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 14px rgba(123, 229, 255, .25));
}
.menu-card h1 span { font-weight: 400; }
.menu-card h2 { margin: 0 0 14px; font-size: 15px; letter-spacing: .3em; color: var(--cyan-soft); }
.menu-tag { margin: 0 0 18px; font-size: 10.5px; letter-spacing: .12em; color: var(--dim); }
.pilot { display: block; margin-bottom: 10px; font-size: 9px; letter-spacing: .3em; color: var(--dim); }
.pilot input {
  display: block; width: 100%; margin-top: 6px;
  font: inherit; font-size: 16px; font-weight: 700; letter-spacing: .12em;
  color: var(--cyan-soft); text-transform: uppercase;
  background: rgba(5, 3, 20, .8);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 11px 13px; outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.pilot input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(79, 216, 255, .12); }
.pilot-error { margin: 4px 0 8px; font-size: 10px; letter-spacing: .08em; color: var(--danger); }
.pilot-error.hidden { display: none; }
.menu-stats {
  display: flex; gap: 14px; flex-wrap: wrap;
  margin: 2px 0 14px; font-size: 9.5px; letter-spacing: .14em; color: var(--dim);
}
.menu-actions { display: grid; gap: 9px; }
.btn {
  font: inherit; font-size: 12.5px; font-weight: 800; letter-spacing: .24em;
  color: var(--cyan-soft); cursor: pointer;
  background: rgba(79, 216, 255, .05);
  border: 1px solid rgba(79, 216, 255, .35);
  border-radius: 12px; padding: 13px;
  transition: all .14s;
}
.btn:hover { background: rgba(79, 216, 255, .13); box-shadow: 0 0 18px rgba(79, 216, 255, .22); transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(.98); }
.btn.primary {
  color: #041226;
  background: linear-gradient(95deg, #53e0ff, #9be8ff);
  border-color: transparent;
  box-shadow: 0 0 24px rgba(83, 224, 255, .35);
}
.btn.primary:hover { box-shadow: 0 0 34px rgba(83, 224, 255, .55); }
.score-tabs { display: flex; gap: 8px; margin-bottom: 10px; }
.score-tab {
  flex: 1; font: inherit; font-size: 10px; font-weight: 700; letter-spacing: .2em;
  color: var(--dim); cursor: pointer;
  background: transparent; border: 1px solid var(--line); border-radius: 9px; padding: 8px;
  transition: all .14s;
}
.score-tab.on { color: #041226; background: var(--cyan-soft); border-color: transparent; }
.score-status { margin: 0 0 10px; font-size: 9.5px; letter-spacing: .1em; color: var(--dim); min-height: 12px; }
.score-list { list-style: none; margin: 0 0 14px; padding: 0; display: grid; gap: 5px; }
.score-list li {
  display: grid; grid-template-columns: 26px 1fr auto; grid-template-rows: auto auto;
  align-items: baseline; column-gap: 8px;
  font-size: 12px; padding: 7px 10px;
  background: rgba(79, 216, 255, .03);
  border: 1px solid var(--line-soft); border-radius: 9px;
}
.score-list li.me { border-color: rgba(255, 79, 216, .5); background: rgba(255, 79, 216, .06); }
.score-list .rk { color: var(--dim); font-size: 10px; }
.score-list .nm { font-weight: 800; letter-spacing: .08em; }
.score-list .meta { grid-column: 2; font-size: 9px; color: var(--dim); letter-spacing: .06em; }
.score-list .sc { grid-row: 1 / span 2; align-self: center; color: var(--cyan-soft); font-weight: 800; }
.score-list li.empty { display: block; text-align: center; color: var(--dim); font-size: 11px; }
.howto { margin: 0 0 16px; padding-left: 18px; display: grid; gap: 9px; font-size: 11px; line-height: 1.55; color: var(--text); }

/* ---------- game over ---------- */
.overlay {
  position: absolute; inset: 0; z-index: 18;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at center, rgba(60, 8, 50, .35), rgba(5, 2, 24, .88) 80%);
  animation: fadeIn .3s;
}
.overlay.hidden { display: none; }
@keyframes fadeIn { from { opacity: 0; } }
.overlay .card {
  width: min(400px, 92vw);
  background: rgba(12, 5, 28, .92);
  border: 1px solid rgba(255, 79, 216, .45);
  border-radius: 18px; padding: 26px;
  text-align: center;
  box-shadow: 0 0 70px rgba(255, 79, 216, .22);
  animation: cardIn .35s cubic-bezier(.2, 1.4, .4, 1);
}
.overlay h1 {
  margin: 0 0 10px; font-size: 27px; font-weight: 900; letter-spacing: .14em;
  background: linear-gradient(95deg, #ff9de2, #ff5a6e);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 16px rgba(255, 79, 216, .4));
}
.overlay .card p { margin: 0 0 16px; font-size: 12px; letter-spacing: .1em; color: var(--text); }
.over-best {
  margin: -8px 0 14px !important;
  font-size: 11px !important; font-weight: 800; letter-spacing: .3em;
  color: #ffd166 !important;
  animation: bestPulse 1s ease-in-out infinite alternate;
}
.over-best.hidden { display: none; }
@keyframes bestPulse { from { opacity: .65; } to { opacity: 1; text-shadow: 0 0 14px rgba(255, 209, 102, .8); } }

/* ---------- small heights: hide help ---------- */
@media (max-height: 740px) { .help { display: none; } }

/* ---------- hold hint + touch-only helpers ---------- */
.hold-hint { font-size: 8px; letter-spacing: .28em; color: var(--dim); }
.touch-only { display: none; }
@media (pointer: coarse) {
  .touch-only { display: inline; }
}