:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --surface-2: #f4f4f3;
  --fg: #18181b;
  --fg-2: #3f3f46;
  --muted: #71717a;
  --border: #e7e5e4;
  --border-strong: #d6d3d1;

  --tile: #f5f5f4;
  --tile-hover: #ececea;
  --tile-selected: #18181b;
  --tile-selected-fg: #fafaf9;

  /* Clique brand palette — mapped to Connections difficulty levels */
  /* yellow=easiest → amber, green=mod → teal, blue=challenging → coral, purple=hardest → purple */
  --yellow: #FAC775; /* amber */
  --green:  #5DCAA5; /* teal */
  --blue:   #F0997B; /* coral */
  --purple: #AFA9EC; /* purple */

  --brand-purple: #AFA9EC;
  --brand-purple-deep: #7F77DD;
  --brand-coral:  #F0997B;
  --brand-teal:   #5DCAA5;
  --brand-amber:  #FAC775;

  --accent: #18181b;
  --accent-hover: #27272a;
  --danger: #be3a3a;
  --success: #2f7a3a;
  --hint: #a07a00;

  --shadow-sm: 0 1px 2px rgba(24, 24, 27, 0.04);
  --shadow-md: 0 4px 16px rgba(24, 24, 27, 0.06);
  --shadow-lg: 0 24px 48px rgba(24, 24, 27, 0.12);

  --radius: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-fast: 120ms var(--ease);
  --t-med: 220ms var(--ease);
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand-purple: #AFA9EC;
    --brand-purple-deep: #9690e3;
    --brand-coral:  #F0997B;
    --brand-teal:   #5DCAA5;
    --brand-amber:  #FAC775;
    --bg: #0c0c0d;
    --surface: #161618;
    --surface-2: #1c1c1f;
    --fg: #f4f4f5;
    --fg-2: #d4d4d8;
    --muted: #a1a1aa;
    --border: #27272a;
    --border-strong: #3f3f46;

    --tile: #1f1f22;
    --tile-hover: #27272a;
    --tile-selected: #f4f4f5;
    --tile-selected-fg: #0c0c0d;

    --yellow: #e6c247;
    --green:  #7cb259;
    --blue:   #8ea7d8;
    --purple: #a373b3;

    --accent: #f4f4f5;
    --accent-hover: #e4e4e7;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.6);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-feature-settings: "ss01", "cv01", "cv02";
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.005em;
}

a { color: var(--fg); }

/* ---------------- Header ---------------- */
header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 1.5rem;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--fg);
}
.brand-icon {
  display: inline-flex;
  align-self: center;
  line-height: 0;
}
.brand-name {
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.025em;
  color: var(--fg);
}
.brand-tag {
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.01em;
}
@media (max-width: 560px) {
  .brand-tag { display: none; }
}
header nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
header nav a {
  padding: 0.4rem 0.75rem;
  margin: 0;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-pill);
  transition: color var(--t-fast), background var(--t-fast);
}
header nav a:hover { color: var(--fg); background: var(--surface-2); }
.key-link { font-size: 0.85rem; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

h2 {
  margin-top: 0;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.65rem;
}
h3 { font-weight: 700; letter-spacing: -0.015em; }
h4 { font-weight: 600; letter-spacing: -0.01em; }
.muted { color: var(--muted); font-size: 0.9rem; }

/* ---------------- Home / list ---------------- */
.filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.filters label {
  display: flex;
  flex-direction: column;
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  gap: 0.3rem;
}

select, .filters select, .meta-row select, .build select, .dialog-body select {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.55rem 2rem 0.55rem 0.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--fg);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path d='M3 4.5l3 3 3-3' stroke='%2371717a' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 0.65rem center;
  cursor: pointer;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
select:focus, input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.puzzle-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.puzzle-list li {
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-fast), box-shadow var(--t-med), border-color var(--t-fast);
}
.puzzle-list li:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.puzzle-list li.loading {
  color: var(--muted);
  border-style: dashed;
  background: transparent;
  box-shadow: none;
  padding: 1rem 1.25rem;
}
.puzzle-list li.loading:hover { transform: none; box-shadow: none; }
.puzzle-list a {
  color: var(--fg);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.95rem;
  padding: 0.85rem 1rem;
}
.puzzle-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: 12px;
  display: block;
  box-shadow: 0 2px 8px rgba(24, 24, 27, 0.08);
}
@media (prefers-color-scheme: dark) {
  .puzzle-icon { box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5); }
}
.puzzle-info { flex: 1; min-width: 0; }
.row-title { font-weight: 600; font-size: 1rem; letter-spacing: -0.01em; }
.puzzle-list .meta {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 400;
  margin-top: 0.35rem;
}

.cta {
  margin-top: 2.5rem;
  text-align: center;
  font-size: 0.95rem;
}
.cta a {
  color: var(--fg);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--fg);
  padding-bottom: 1px;
}
.cta a:hover { color: var(--muted); border-color: var(--muted); }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.55rem;
  background: var(--surface-2);
  color: var(--fg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

/* ---------------- Play ---------------- */
.play-header { text-align: center; margin-bottom: 1.5rem; }
.play-header h2 { margin-bottom: 0.25rem; font-size: 1.85rem; }

.solved {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.solved-row {
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  text-align: center;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #18181b;
  animation: fadeUp 320ms var(--ease);
}
.solved-row .cat {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}
.solved-row .words {
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0.78;
  margin-top: 0.2rem;
}
.solved-row.yellow { background: var(--yellow); }
.solved-row.green  { background: var(--green); }
.solved-row.blue   { background: var(--blue); }
.solved-row.purple { background: var(--purple); color: #fff; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.55rem;
  margin-bottom: 1.25rem;
}
.tile {
  background: var(--tile);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.4rem;
  height: 78px;
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform var(--t-fast), background var(--t-fast), color var(--t-fast), box-shadow var(--t-fast);
  font-family: inherit;
  color: var(--fg);
  word-break: break-word;
  user-select: none;
}
.tile:hover:not(:disabled) {
  background: var(--tile-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.tile.selected {
  background: var(--tile-selected);
  color: var(--tile-selected-fg);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.tile:active { transform: translateY(0) scale(0.98); }
.tile:disabled { cursor: default; }

.tile.pictograph {
  font-size: 2.4rem;
  text-transform: none;
  letter-spacing: 0;
  line-height: 1;
}
.solved-row.pictograph .words {
  font-size: 1.4rem;
  letter-spacing: 0.05em;
  font-weight: 500;
  opacity: 1;
}

.tile.with-hint { position: relative; }
.tile.with-hint::after {
  content: attr(data-hint);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--fg);
  color: var(--bg);
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 500;
  z-index: 20;
  pointer-events: none;
  white-space: normal;
  width: max-content;
  max-width: 220px;
  text-transform: none;
  letter-spacing: 0;
  line-height: 1.4;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transition: opacity 140ms var(--ease), transform 140ms var(--ease);
}
.tile.with-hint:hover::after,
.tile.with-hint:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.hint-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  color: var(--fg-2);
  cursor: pointer;
  user-select: none;
  font-weight: 500;
}
.hint-toggle[hidden] { display: none; }
.hint-toggle input {
  margin: 0;
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--accent);
}

@keyframes shake {
  0%,100% { transform: translateX(0); }
  20% { transform: translateX(-5px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}
.tile.shake { animation: shake 0.42s cubic-bezier(0.36, 0.07, 0.19, 0.97); }

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.06); }
  100% { transform: scale(1); }
}
.tile.pop { animation: pop 0.25s var(--ease); }

.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
}
.mistakes {
  font-size: 0.875rem;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
#mistakes-dots {
  display: inline-flex;
  gap: 4px;
}
#mistakes-dots .dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  transition: opacity var(--t-med), transform var(--t-med);
}
#mistakes-dots .dot.gone {
  opacity: 0.18;
  transform: scale(0.8);
}

.buttons { display: flex; gap: 0.5rem; flex-wrap: wrap; }

button {
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--fg);
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  letter-spacing: -0.005em;
  transition: background var(--t-fast), border-color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast), color var(--t-fast);
}
button:hover:not(:disabled) {
  background: var(--surface-2);
  border-color: var(--fg-2);
}
button:active:not(:disabled) { transform: translateY(1px); }
button.primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
button.primary:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--bg);
}
button:disabled { opacity: 0.4; cursor: not-allowed; }

.message {
  margin-top: 1.25rem;
  text-align: center;
  min-height: 1.5rem;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: -0.005em;
}
.message.win { color: var(--success); }
.message.lose { color: var(--danger); }
.message.hint { color: var(--hint); }

/* ---------------- Build ---------------- */
.build form { display: flex; flex-direction: column; gap: 1.1rem; }
.build label {
  display: flex;
  flex-direction: column;
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
  gap: 0.35rem;
}
.build input, .dialog-body input {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--fg);
  background: var(--surface);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}

.groups { display: flex; flex-direction: column; gap: 0.75rem; }
.group {
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  position: relative;
  overflow: hidden;
}
.group::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: currentColor;
}
.group.g-yellow { color: #b07a00; }
.group.g-green  { color: #1f7a5e; }
.group.g-blue   { color: #b65335; }
.group.g-purple { color: var(--brand-purple-deep); }
.group label, .group input { color: var(--fg); }
.group label { color: var(--muted); }

.words {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  margin-top: 0.6rem;
}
.words input { text-transform: uppercase; font-weight: 600; letter-spacing: 0.02em; }

.meta-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.ai-row {
  display: flex;
  gap: 0.85rem;
  align-items: center;
  flex-wrap: wrap;
  padding: 1rem;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 4%, transparent), color-mix(in srgb, var(--purple) 5%, transparent));
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}
.ai-row button {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.ai-row button:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.build-output {
  margin-top: 1rem;
  word-break: break-all;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}
.build-output a { color: var(--fg); font-weight: 500; }
.build-output pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-size: 0.8rem;
  font-family: ui-monospace, SFMono-Regular, "Menlo", "Consolas", monospace;
}

/* ---------------- Dialog (keys + generate) ---------------- */
dialog {
  border: none;
  border-radius: var(--radius);
  padding: 0;
  max-width: 480px;
  width: calc(100% - 2rem);
  background: var(--surface);
  color: var(--fg);
  box-shadow: var(--shadow-lg);
}
dialog::backdrop {
  background: rgba(15, 15, 17, 0.45);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.dialog-body { padding: 1.5rem; }
.dialog-body h3 { margin-top: 0; font-size: 1.2rem; }
.dialog-body label {
  display: flex;
  flex-direction: column;
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
  gap: 0.35rem;
  margin-bottom: 0.85rem;
}

.keys-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  margin: 1rem 0;
}
.key-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.85rem;
  background: var(--surface);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
}
.key-card:hover {
  background: var(--surface-2);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}
.key-card .status {
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 500;
}
.key-card .status.set { color: var(--success); font-weight: 600; }

.key-editor {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}
.key-editor h4 { margin: 0 0 0.5rem; }
.key-editor input { width: 100%; margin-bottom: 0.85rem; }

/* ---------------- Review ---------------- */
.link-row {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
  margin: 0.75rem 0;
}
.link-row input {
  flex: 1;
  font-family: ui-monospace, SFMono-Regular, "Menlo", "Consolas", monospace;
  font-size: 0.8rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--fg);
  min-width: 0;
}

input.dup-bad {
  border-color: var(--danger) !important;
  background: color-mix(in srgb, var(--danger) 8%, var(--surface));
}

.tips { display: flex; flex-direction: column; gap: 0.85rem; }
.tips-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--t-fast), transform var(--t-fast);
}
.tips-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
}
.tips-card h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.tips-card p { margin: 0; color: var(--fg-2); font-size: 0.95rem; }

.publish-cta {
  margin-top: 2rem;
  padding: 1.25rem;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 4%, transparent), color-mix(in srgb, var(--purple) 5%, transparent));
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}
.publish-cta h3 { margin-top: 0; }
.publish-cta button {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.publish-cta button:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.pr-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 1.25rem;
}
.pr-row .meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.2rem;
}
.pr-row a { color: var(--fg); text-decoration: none; font-weight: 500; }
.pr-row a:hover { text-decoration: underline; }
.review-header { margin-bottom: 1rem; }

/* nest pr-row inside .puzzle-list li without double padding */
.puzzle-list li:has(.pr-row) > .pr-row { padding: 0; }

/* ---------------- Mobile ---------------- */
@media (max-width: 560px) {
  main { padding: 1.25rem 1rem 3rem; }
  header { padding: 0.7rem 1rem; }
  header nav a { padding: 0.35rem 0.6rem; font-size: 0.82rem; }
  h2 { font-size: 1.4rem; }
  .play-header h2 { font-size: 1.5rem; }
  .tile { height: 68px; font-size: 0.82rem; }
  .words { grid-template-columns: 1fr; }
  .meta-row { grid-template-columns: 1fr; }
  .keys-grid { grid-template-columns: 1fr; }
}