/* ============================================================
   Colordle – style.css
   Dark theme, custom properties, accessibility, animations.
   ============================================================ */

/* ── Custom properties ─────────────────────────────────────── */
:root {
  --bg:           #161616;
  --bg-elev-1:    #1d1d1d;
  --bg-elev-2:    #262626;
  --bg-input:     #121212;
  --border:       #2a2a2a;
  --border-strong:#3d3d3d;
  --text:         #e8e8e8;
  --text-dim:     #9e9e9e;

  --c-red:    #cc3838; /* darker for WCAG AA on white text */
  --c-yellow: #e2b93b;
  --c-green:  #46b04a;
  --c-exact:  #1fd17a;

  /* Channel-axis tints */
  --ch-r: #ff6b6b;
  --ch-g: #5ad884;
  --ch-b: #6fa0ff;

  --radius:    8px;
  --radius-sm: 6px;
  --focus-ring: 0 0 0 2px #1fd17a;
}

/* ── Reset / base ───────────────────────────────────────────── */
* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  padding: 1rem;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
}

main {
  max-width: 640px;
  margin: 0 auto;
}

/* ── Header ─────────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

h1 {
  margin: 0;
  font-size: 1.75rem;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.game-icon {
  width: 1.8em;
  height: 1.8em;
  object-fit: contain;
  display: inline-block;
}
.game-icon:not([src]), .game-icon[src=""] { display: none; }

/* ── Controls ───────────────────────────────────────────────── */
.controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.controls label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.85;
}

/* ── Base form elements ─────────────────────────────────────── */
button,
input[type="number"],
input[type="text"] {
  font: inherit;
  color: var(--text);
  background: var(--bg-elev-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.7rem;
}

input[type="number"] { width: 4.5rem; }
input[type="text"] {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  width: 7rem;
}

/* ── RGB channel inputs ─────────────────────────────────────── */
.rgb-group {
  display: flex;
  gap: 0.25rem;
}
.rgb-group input {
  width: 3.2rem;
  text-align: center;
  padding: 0.45rem 0.35rem;
}
.rgb-group input:nth-child(1) { box-shadow: inset 0 -2px 0 var(--c-red); }
.rgb-group input:nth-child(2) { box-shadow: inset 0 -2px 0 var(--c-green); }
.rgb-group input:nth-child(3) { box-shadow: inset 0 -2px 0 #4d88ff; }

input[type="text"].invalid { border-color: #c44; }

/* ── Buttons ────────────────────────────────────────────────── */
button {
  cursor: pointer;
  transition: background 0.15s;
}
button:hover:not(:disabled) { background: #333; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

input:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ── Target swatch ──────────────────────────────────────────── */
.target { text-align: center; margin-bottom: 1.25rem; }

.swatch {
  width: 100%;
  height: 180px;
  border-radius: 10px;
  border: 2px solid var(--border);
  box-shadow: inset 0 0 0 1px #0006;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  font-weight: 800;
  color: #555;
  letter-spacing: -0.02em;
  user-select: none;
}

.swatch.hidden {
  background:
    repeating-linear-gradient(
      45deg,
      #242424 0, #242424 14px,
      #2e2e2e 14px, #2e2e2e 28px
    ) !important;
}

.swatch.small {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.counter {
  margin: 0.6rem 0 0;
  opacity: 0.8;
  font-variant-numeric: tabular-nums;
}

/* Practice-mode controls sit centered under the counter; hidden in daily mode */
.target .controls {
  margin-top: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Input section ──────────────────────────────────────────── */
.input {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  padding: 0.75rem;
  background: var(--bg-elev-1);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.input input[type="color"] {
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.input input[type="color"]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Hex shortcut input (monospace, uppercase, auto-populated) */
.hex-input {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  text-transform: uppercase;
  width: 5.5rem;
  text-align: center;
}

.guess-preview {
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: #808080;
}

/* ── Possible-target panel ──────────────────────────────────── */
.possible {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
  padding: 0.6rem 0.75rem;
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.82rem;
  transition: background 160ms ease, border-color 160ms ease, padding 160ms ease;
}
/* Collapsed state: strip the card chrome so a single naked pill is shown.
 * Prevents the "empty loading card" look that the bordered frame creates
 * when the hints body is hidden. */
.possible.collapsed {
  background: transparent;
  border-color: transparent;
  padding: 0;
  margin-bottom: 0.75rem;
}

/* Collapsible hints panel — default hidden, toggled via .hints-toggle */
.hints-header {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hints-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.9rem;
  background: var(--bg-elev-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.hints-toggle:hover { background: #333; }
.hints-toggle[aria-expanded="true"] {
  background: var(--bg-elev-1);
  border-color: var(--c-exact);
  color: var(--c-exact);
}
.hints-toggle-caret {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 5px solid currentColor;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform 180ms ease;
}
.hints-toggle[aria-expanded="true"] .hints-toggle-caret {
  transform: rotate(90deg);
}

.hints-body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.hints-body[hidden] { display: none; }

.poss-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: ui-monospace, monospace;
}

.poss-label {
  width: 1.1rem;
  font-weight: 700;
  text-align: center;
}
.poss-row.cr .poss-label { color: var(--ch-r); }
.poss-row.cg .poss-label { color: var(--ch-g); }
.poss-row.cb .poss-label { color: var(--ch-b); }

.poss-track {
  position: relative;
  flex: 1;
  height: 1.4rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  min-width: 0;
}

.poss-seg {
  position: absolute;
  top: 0;
  bottom: 0;
  background: #3a3a3a;
}
.poss-row.cr .poss-seg { background: linear-gradient(to right, #4a1d1d, var(--ch-r)); }
.poss-row.cg .poss-seg { background: linear-gradient(to right, #1d4a2a, var(--ch-g)); }
.poss-row.cb .poss-seg { background: linear-gradient(to right, #1d2a4a, var(--ch-b)); }

/* Tick marks on possible-target bars */
.poss-tick {
  position: absolute;
  top: -1px;
  bottom: -1px;
  width: 2px;
  margin-left: -1px;
  background: #fff;
  box-shadow: 0 0 0 1px #000a;
  pointer-events: auto;
}
.poss-tick.exact  { background: var(--c-exact); box-shadow: 0 0 0 1px #000, 0 0 6px var(--c-exact); }
.poss-tick.green  { background: var(--c-green); }
.poss-tick.yellow { background: var(--c-yellow); }
.poss-tick.red    { background: var(--c-red); }

.poss-hint {
  min-width: 4.5rem;
  font-size: 0.72rem;
  color: #a8a8a8;
  text-align: right;
}

.poss-apply {
  margin-top: 0.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  align-self: flex-start;
  padding: 0.55rem 0.85rem;
  background: var(--bg-elev-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text);
  cursor: pointer;
}
.poss-apply:hover { background: #333; }
.poss-apply:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.poss-apply-label { opacity: 0.85; }
.poss-apply-swatch {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 1px solid #0008;
}
.poss-apply-hex {
  font-family: ui-monospace, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

/* ── Help chip + tooltip ────────────────────────────────────── */
.help-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #3a3a3a;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: help;
  user-select: none;
  letter-spacing: 0;
  text-transform: none;
  transition: background 0.15s;
  /* Invisible hit-area expansion to ~32px without growing the visible chip */
  box-shadow: 0 0 0 4px transparent;
}
.help-chip:hover { background: #5a5a5a; }
.help-chip:focus-visible {
  background: #5a5a5a;
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Mobile: pin tooltip to right edge to avoid overflow */
.help-tooltip {
  position: absolute;
  top: calc(100% + 6px);
  left: auto;
  right: 0;
  z-index: 20;
  width: min(340px, 90vw);
  padding: 0.75rem 0.9rem;
  background: #313131;
  border: 1px solid #585858;
  border-radius: 7px;
  font-size: 0.82rem;
  font-weight: 400;
  color: #f2f2f2;
  text-transform: none;
  letter-spacing: normal;
  line-height: 1.5;
  opacity: 0;
  transform: scale(0.7);
  transform-origin: top right;
  transition:
    transform 220ms cubic-bezier(0.2, 0.85, 0.25, 1.25),
    opacity 160ms ease-out;
  pointer-events: none;
  box-shadow: 0 12px 30px #000c;
}
/* On wider screens revert to left-aligned */
@media (min-width: 520px) {
  .help-tooltip {
    left: 0;
    right: auto;
    transform-origin: top left;
  }
}

.help-tooltip b { color: #fff; }

.help-chip:hover ~ .help-tooltip,
.help-chip:focus ~ .help-tooltip,
.help-chip:focus-visible ~ .help-tooltip,
.help-tooltip:hover {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

/* ── History / guess rows ───────────────────────────────────── */
.history {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

/* Entrance animation — neutralised by reduced-motion block below */
@keyframes guess-row-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

.row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem;
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex-wrap: wrap;
  animation: guess-row-in 180ms ease-out;
}

.row .hex {
  font-family: ui-monospace, monospace;
  font-size: 0.9rem;
  opacity: 0.8;
  min-width: 5rem;
  font-variant-numeric: tabular-nums;
}

/* ── Channel result blocks ──────────────────────────────────── */
.channels {
  display: flex;
  gap: 0.35rem;
  margin-left: auto;
  flex-wrap: wrap;
}

.channel {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.3rem 0.55rem;
  border-radius: 5px;
  font-family: ui-monospace, monospace;
  min-width: 4.4rem;
  line-height: 1.15;
}

.channel-main {
  font-size: 0.85rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.channel-range {
  font-size: 0.72rem;
  font-weight: 500;
  margin-top: 0.1rem;
  font-variant-numeric: tabular-nums;
}

.channel.red    { background: var(--c-red);    color: #fff; }
.channel.yellow { background: var(--c-yellow); color: #1a1a1a; }
.channel.green  { background: var(--c-green);  color: #0a0a0a; }
.channel.exact  { background: var(--c-exact);  color: #0a0a0a; box-shadow: 0 0 0 2px #fff8; }

/* Colorblind icons — prepend glyph before channel value text */
.channel.red    .channel-main::before { content: "\25CF  "; opacity: 0.85; }
.channel.yellow .channel-main::before { content: "\25C6  "; opacity: 0.85; }
.channel.green  .channel-main::before { content: "\25B2  "; opacity: 0.85; }
.channel.exact  .channel-main::before { content: "\2605  "; opacity: 0.85; }

/* ── Nearness badge ─────────────────────────────────────────── */
.nearness {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 0.35rem;
  padding: 0.35rem 0.6rem;
  border-radius: 5px;
  font-family: ui-monospace, monospace;
  font-size: 0.82rem;
  font-weight: 700;
  color: #fff;
  min-width: 3.2rem;
  text-align: center;
  box-shadow: inset 0 0 0 1px #0004;
}

/* ── Legend chips ───────────────────────────────────────────── */
.chip {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-family: ui-monospace, monospace;
  font-size: 0.78rem;
  font-weight: 600;
  margin: 0 0.15rem 0 0.6rem;
  vertical-align: middle;
}
.chip.red    { background: var(--c-red);    color: #fff; }
.chip.yellow { background: var(--c-yellow); color: #1a1a1a; }
.chip.green  { background: var(--c-green);  color: #0a0a0a; }
.chip.exact  { background: var(--c-exact);  color: #0a0a0a; }

/* Colorblind icons for legend chips */
.chip.red::before    { content: "\25CF  "; }
.chip.yellow::before { content: "\25C6  "; }
.chip.green::before  { content: "\25B2  "; }
.chip.exact::before  { content: "\2605  "; }

/* ── Result panel ───────────────────────────────────────────── */
.result {
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  margin-bottom: 1rem;
}
.result h2 { margin: 0 0 0.5rem; }
.result .reveal {
  display: inline-block;
  width: 32px;
  height: 16px;
  border-radius: 3px;
  border: 1px solid #444;
  vertical-align: middle;
  margin: 0 0.3rem;
}

.best-line {
  margin-top: 0.4rem;
  opacity: 0.9;
  font-size: 0.95rem;
}

.best-pct {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  font-family: ui-monospace, monospace;
  font-weight: 700;
  color: #fff;
  font-size: 0.88rem;
  box-shadow: inset 0 0 0 1px #0004;
}

/* Play-again button (injected by features agent) */
.play-again {
  margin-top: 0.9rem;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.55rem 1.2rem;
  background: var(--c-exact);
  color: #0a0a0a;
  border: 1px solid #1aae66;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.play-again:hover { background: #27dd88; }
.play-again:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Stats line (under daily result) */
.stats-line {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.stats-line .stat-value {
  color: var(--text);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ── Share row ──────────────────────────────────────────────── */
.share-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 0.9rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border);
}

.share-label {
  font-size: 0.78rem;
  opacity: 0.65;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-right: 0.25rem;
}

.share-btn {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: #3a3a3a;
  border: 1px solid #4a4a4a;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 0.1s, background 0.15s;
}
.share-btn:hover { transform: translateY(-1px); }
.share-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.share-btn.x     { background: #111; border-color: #333; }
.share-btn.x:hover { background: #000; }
.share-btn.fb    { background: #1877f2; border-color: #1b6ed6; }
.share-btn.fb:hover { background: #1366d6; }
.share-btn.img   { background: #2d7d46; border-color: #26683a; }
.share-btn.img:hover { background: #25713c; }

/* ── Daily badge (inline in .counter under the target) ──────── */
.daily-badge,
.daily-streak-wrap {
  font-family: ui-monospace, monospace;
  font-size: inherit;
  color: var(--text-dim);
}
.daily-badge .sep,
.daily-streak-wrap .sep {
  margin: 0 0.35rem;
  opacity: 0.5;
}
.daily-streak {
  color: var(--c-exact);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ── Mode switch (pill segmented control) ───────────────────── */
.mode-switch {
  display: inline-flex;
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px;
  font-size: 0.8rem;
}
.mode-switch button {
  background: transparent;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  color: var(--text-dim);
  cursor: pointer;
}
.mode-switch button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.mode-switch button.active {
  background: var(--bg-elev-2);
  color: var(--text);
}

/* ── Footer ─────────────────────────────────────────────────── */
footer {
  margin-top: 1.5rem;
  font-size: 0.82rem;
  opacity: 0.7;
}
.legend, .note { margin: 0.3rem 0; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 480px) {
  h1 { font-size: 1.4rem; }
  .swatch { height: 140px; }
  .channels { margin-left: 0; }
}

/* ── Reduced motion ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}