/* ---------- Art style ----------
   One look: minimalist, low-poly, colourful gradients that are always gently moving.
   The board itself is drawn on the canvas (see "Art" in script.js). The page around it is a
   slowly drifting gradient whose colours (--g1..--g3) and --accent are set from script.js for
   each stage; registering them with @property lets them ease smoothly from stage to stage. */
@property --g1 { syntax: '<color>'; inherits: true; initial-value: #3fa9e6; }
@property --g2 { syntax: '<color>'; inherits: true; initial-value: #8edbc4; }
@property --g3 { syntax: '<color>'; inherits: true; initial-value: #ffd27f; }
@property --accent { syntax: '<color>'; inherits: true; initial-value: #ff7a59; }

:root {
  --g1: #3fa9e6;
  --g2: #8edbc4;
  --g3: #ffd27f;
  --accent: #ff7a59;
  --font: "Outfit", system-ui, -apple-system, "Segoe UI", sans-serif;
  --text: #ffffff;
  --ink: #17123a;                          /* dark text on light chips */
  --glass: rgba(16, 12, 44, 0.42);         /* the start / game over / paused screens */
  --panel: rgba(16, 12, 44, 0.82);         /* the settings screen */
  --line: rgba(255, 255, 255, 0.24);
  --chip: rgba(255, 255, 255, 0.1);
  --radius: 36px;
  transition: --g1 1.4s ease, --g2 1.4s ease, --g3 1.4s ease, --accent 1.4s ease;
}

/* ---------- Page ---------- */

html {
  touch-action: pan-x pan-y; /* no pinch or double-tap zoom, but the settings menu can still scroll */
  -webkit-text-size-adjust: 100%;
  min-height: 100%;
  color: var(--text);
  font-family: var(--font);
  background: var(--g2);
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* The page gradient is its own layer. It holds still (the moving art lives on the board,
   where it is cheap to draw); it only eases to new colours when the stage changes. */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background: linear-gradient(125deg, var(--g1), var(--g2) 55%, var(--g3));
}

body {
  margin: 0;
  overflow: hidden;            /* single-screen game, no scrolling */
  overscroll-behavior: none;   /* no pull-to-refresh on mobile */
  touch-action: pan-x pan-y;   /* no pinch/double-tap zoom (the page itself never scrolls) */
}

/* Big, soft low-poly shards behind the board */
body::before,
body::after {
  content: '';
  position: fixed;
  z-index: -1;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.1);
}
body::before {
  width: 70vmax;
  height: 70vmax;
  left: -25vmax;
  top: -30vmax;
  clip-path: polygon(10% 30%, 75% 0%, 100% 70%, 35% 100%);
}
body::after {
  width: 60vmax;
  height: 60vmax;
  right: -22vmax;
  bottom: -28vmax;
  background: rgba(255, 255, 255, 0.08);
  clip-path: polygon(0% 40%, 60% 0%, 100% 55%, 45% 100%);
}

h1, h2 {
  font-family: var(--font);
  margin: 0;
}

#game-screen {
  display: block;
  border: 0;
  border-radius: var(--radius);
  background: var(--g2);
  box-shadow: 0 2.5rem 5rem rgba(20, 10, 60, 0.32), 0 0 0 1px rgba(255, 255, 255, 0.18);
  opacity: 0;
  touch-action: none; /* the board belongs to the game: no browser gestures at all */
}

.container {
  width: 100%;
  height: 100vh;
  height: 100dvh; /* accounts for mobile browser toolbars */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2.4vh;
}

#canvas-box {
  position: relative;
  --board: 800px; /* set from JS to the canvas size */
}

#score {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-size: calc(var(--board) * 0.3);
  font-weight: 200;
  letter-spacing: -0.02em;
  color: rgba(255, 255, 255, 0.42);
  text-shadow: 0 0.04em 0.2em rgba(20, 10, 60, 0.12);
  pointer-events: none;
}

/* ---------- Start / game over / paused screen ---------- */

.overlay {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: calc(var(--board) * 0.032);
  border-radius: var(--radius);
  background: linear-gradient(to bottom, rgba(16, 12, 44, 0.2), var(--glass) 45%, var(--glass));
  text-align: center;
  pointer-events: none; /* taps go through to the game */
  z-index: 2;
}

body.overlay-open .overlay { display: flex; }
body.overlay-open #score { visibility: hidden; }

.overlay h2 {
  font-size: calc(var(--board) * 0.13);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1;
}

.overlay p {
  margin: 0;
  font-size: calc(var(--board) * 0.05);
  font-weight: 400;
  opacity: 0.9;
}

#overlay-score { font-weight: 600; }

#overlay-stage {
  font-size: calc(var(--board) * 0.042);
  font-weight: 600;
  color: var(--accent);
  opacity: 1;
}

#overlay-hint {
  margin-top: calc(var(--board) * 0.02);
  font-size: calc(var(--board) * 0.042);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  animation: hint-pulse 1.8s ease-in-out infinite;
}

@keyframes hint-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

/* ---------- Journey track (start and game over screens) ---------- */

.journey {
  list-style: none;
  margin: calc(var(--board) * 0.01) 0 0;
  padding: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  width: 86%;
}

.journey li {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(var(--board) * 0.016);
}

/* The path between stops */
.journey li + li::before {
  content: '';
  position: absolute;
  top: calc(var(--board) * 0.017);
  right: 50%;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.28);
  transform: translateY(-50%);
  z-index: -1;
}
.journey li.reached + li.reached::before { background: rgba(255, 255, 255, 0.85); }

/* Each stop is a small diamond, in keeping with the low-poly look */
.journey-dot {
  width: calc(var(--board) * 0.034);
  height: calc(var(--board) * 0.034);
  box-sizing: border-box;
  border: 2px solid rgba(255, 255, 255, 0.6);
  background: rgba(16, 12, 44, 0.4);
  transform: rotate(45deg) scale(0.8);
}
.journey li.reached .journey-dot { background: #ffffff; border-color: #ffffff; }
.journey li.current .journey-dot {
  background: var(--accent);
  border-color: var(--accent);
  transform: rotate(45deg) scale(1.1);
  box-shadow: 0 0 0 calc(var(--board) * 0.008) rgba(255, 255, 255, 0.35);
}

.journey-label {
  font-size: max(11px, calc(var(--board) * 0.03));
  font-weight: 600;
  white-space: nowrap;
  opacity: 0.55;
}
.journey li.reached .journey-label { opacity: 0.95; }
.journey li.next .journey-label { opacity: 0.75; }
.journey li.current .journey-label { color: var(--accent); opacity: 1; }

/* ---------- Stage banner (shown for a moment on reaching a new stage) ---------- */

.stage-banner {
  position: absolute;
  left: 0;
  right: 0;
  top: 17%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(var(--board) * 0.012);
  text-align: center;
  pointer-events: none;
  opacity: 0;
  z-index: 1;
  text-shadow: 0 0.05em 0.4em rgba(20, 10, 60, 0.25);
}

.stage-kicker {
  font-size: calc(var(--board) * 0.036);
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--accent);
}

.stage-banner strong {
  font-size: calc(var(--board) * 0.11);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
}

.stage-banner.show { animation: stage-banner 2.2s ease-out forwards; }
body.overlay-open .stage-banner { animation: none; opacity: 0; }

@keyframes stage-banner {
  0%   { opacity: 0; transform: translateY(-30%); letter-spacing: 0.3em; }
  15%  { opacity: 1; transform: translateY(0); }
  70%  { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12%); }
}

@keyframes stage-banner-fade {
  0%, 100% { opacity: 0; }
  15%, 70% { opacity: 1; }
}

/* ---------- Buttons ---------- */

.pill {
  pointer-events: auto; /* the overlay lets taps through; its buttons still need them */
  font-family: var(--font);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text);
  background: var(--chip);
  border: 1.5px solid var(--line);
  border-radius: 999px;
  padding: 0.4em 1.2em;
  touch-action: manipulation;
}

.pill:focus-visible,
.choice:focus-visible,
.icon-button:focus-visible,
#volume:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* Icons (Lucide line icons) take their colour from the text around them */
.icon {
  width: 1em;
  height: 1em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Round icon-only buttons */
.icon-button {
  pointer-events: auto;
  width: max(42px, calc(var(--board) * 0.11));
  height: max(42px, calc(var(--board) * 0.11));
  padding: 0;
  display: grid;
  place-items: center;
  font-size: max(20px, calc(var(--board) * 0.052)); /* icon size */
  color: var(--text);
  background: var(--chip);
  border: 1.5px solid var(--line);
  border-radius: 50%;
  touch-action: manipulation;
}

/* Settings icon in the top-right corner of the board, on the start and game over screens only */
.corner-button {
  position: absolute;
  top: max(12px, calc(var(--board) * 0.045));
  right: max(12px, calc(var(--board) * 0.045));
  z-index: 3;
  display: none;
}
body[data-state="ready"] .corner-button,
body[data-state="over"] .corner-button { display: grid; }
body.settings-open .corner-button { display: none; }

/* ---------- Settings (same box as the game board, frosted glass) ---------- */

.settings {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  gap: max(14px, calc(var(--board) * 0.04));
  --pad: max(16px, calc(var(--board) * 0.06));
  padding: 0 var(--pad) var(--pad);
  --choice-h: clamp(50px, calc(var(--board) * 0.14), 72px); /* comfortable finger-sized buttons */
  box-sizing: border-box;
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  /* The menu scrolls inside the box (finger drag, mouse wheel or keyboard), without moving the page */
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.settings[hidden] { display: none; }
body.settings-open .overlay { display: none; }
body.settings-open #score { visibility: hidden; }

.settings > * { flex-shrink: 0; } /* let the menu grow and scroll, never squash it */

/* Title row with Done stays pinned at the top while the menu scrolls */
.settings-head {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 calc(-1 * var(--pad));
  padding: var(--pad) var(--pad) 8px;
}

.settings.scrolled .settings-head { box-shadow: 0 1px 0 var(--line); }

.settings h2 {
  font-size: max(22px, calc(var(--board) * 0.07));
  font-weight: 700;
  letter-spacing: 0.04em;
}

.settings-head .icon-button {
  width: max(40px, calc(var(--board) * 0.1));
  height: max(40px, calc(var(--board) * 0.1));
}

.setting {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-label {
  margin: 0;
  font-size: max(12px, calc(var(--board) * 0.03));
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.75;
}

.sound-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  min-width: 5.2em;
  font-size: max(15px, calc(var(--board) * 0.042));
  padding: 0.35em 0.9em;
}

.toggle[aria-pressed="true"],
.size-choice[aria-checked="true"] {
  background: #ffffff;
  border-color: #ffffff;
  color: var(--ink);
}

#volume {
  flex: 1;
  min-width: 0;
  height: 32px;
  margin: 0;
  accent-color: #ffffff;
  touch-action: manipulation;
}

#volume:disabled { opacity: 0.35; }

.choices {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: max(6px, calc(var(--board) * 0.018));
}

.choice {
  height: var(--choice-h);
  padding: 4px 6px;
  border-radius: 16px;
  border: 1.5px solid var(--line);
  background: var(--chip);
  color: var(--text);
  font-family: var(--font);
  touch-action: manipulation;
}

/* Ball size: a dot that grows, the size name and its best score */
.size-choice {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: max(13px, calc(var(--board) * 0.036));
}

.size-dot {
  flex: none;
  background: currentColor;
  clip-path: polygon(50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%); /* a little hexagon */
}

.size-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.15;
  font-weight: 600;
}

.size-text small {
  font-size: 0.8em;
  font-weight: 400;
  opacity: 0.75;
}

/* Climb: progress for this ball size, and the new-climb button with its confirm row */
.climb-status {
  margin: 0;
  font-size: max(14px, calc(var(--board) * 0.04));
  font-weight: 600;
}

.climb-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.climb-row[hidden] { display: none; }
.climb-row .pill { font-size: max(14px, calc(var(--board) * 0.038)); min-height: 40px; }
.climb-row .pill:disabled { opacity: 0.4; }
.climb-confirm-text {
  flex-basis: 100%;
  font-size: max(13px, calc(var(--board) * 0.035));
  opacity: 0.85;
}
.pill.danger { background: #ff5f6d; border-color: #ff5f6d; }

/* ---------- High score ---------- */

#high-score {
  font-size: clamp(16px, 4vmin, 26px);
  font-weight: 600;
  letter-spacing: 0.24em;
  text-shadow: 0 0.1em 0.5em rgba(20, 10, 60, 0.2);
}

#high-score.new-best { animation: new-best 0.5s ease-out; }

@keyframes new-best {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.25); color: var(--accent); }
  100% { transform: scale(1); }
}

/* Short landscape phones: smaller corners */
@media (max-height: 500px) {
  :root { --radius: 22px; }
  .settings { gap: 8px; --pad: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  #overlay-hint, #high-score.new-best { animation: none; }
  .stage-banner.show { animation-name: stage-banner-fade; }
}

/* ---------- Custom cursor ----------
   Just a dot that sits exactly on the pointer, moved straight from the mouse events,
   so it never lags behind on slower machines. */

.cursor-dot {
  position: fixed;
  top: 0;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #ffffff;
  box-shadow: 0 0 0 2px rgba(20, 10, 60, 0.35);
  transform: translate(-50%, -50%);
  z-index: 10;
  pointer-events: none;
  opacity: 0;
  will-change: transform;
}

/* Only replace the cursor on devices with a real mouse */
@media (pointer: fine) {
  html, html * { cursor: none; }

  body.cursor-visible .cursor-dot { opacity: 1; }

  /* Pressed: an instant halo (no animation, so no delay) */
  body.cursor-pressed .cursor-dot {
    box-shadow: 0 0 0 2px rgba(20, 10, 60, 0.35), 0 0 0 8px rgba(255, 255, 255, 0.35);
  }
}