/* ==========================================================================
   Rhyming Words — CIO Factory
   Design system: orient-luxury (near-black + gold, parchment light mode)
   Token source: portable orient-luxury-core.css pattern, inlined here until
   the shared snippet is wired in via <link>.

   Signature element for this app: a Rhyme Constellation — the searched
   word sits at the center like a fixed star, its rhymes orbit around it
   as smaller stars connected by thin gold lines, and clicking any orbiting
   star re-centers the sky around it. A faint ambient starfield drifts
   behind everything to reinforce the night-sky metaphor.
   ========================================================================== */

/* ---------- Design tokens ---------- */

:root {
  --ol-font-display: 'Cinzel', 'Georgia', serif;
  --ol-font-body: 'Cormorant Garamond', 'Georgia', serif;
  --ol-font-ui: 'Syne', 'Helvetica Neue', sans-serif;
  --ol-font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --ol-radius-sm: 4px;
  --ol-radius-md: 10px;
  --ol-radius-lg: 18px;
  --ol-radius-pill: 999px;

  --ol-shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.35);
  --ol-transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

html[data-theme="dark"] {
  --ol-bg: #09080b;
  --ol-bg-elevated: #121014;
  --ol-surface: #17141a;
  --ol-surface-hover: #1e1a22;
  --ol-border: rgba(201, 168, 76, 0.18);
  --ol-border-strong: rgba(201, 168, 76, 0.38);

  --ol-gold: #c9a84c;
  --ol-gold-bright: #ecd27f;
  --ol-gold-dim: rgba(201, 168, 76, 0.55);
  --ol-gold-wash: rgba(201, 168, 76, 0.08);

  --ol-text-primary: #f1ece0;
  --ol-text-secondary: #b9b0a2;
  --ol-text-muted: #7d7568;

  --ol-error: #d9765a;
  --ol-error-wash: rgba(217, 118, 90, 0.12);

  --ol-star-color: rgba(241, 236, 224, 0.65);
  --ol-grain-opacity: 0.05;
}

html[data-theme="light"] {
  --ol-bg: #f0ebe0;
  --ol-bg-elevated: #f7f3ea;
  --ol-surface: #fbf8f1;
  --ol-surface-hover: #f2ecdd;
  --ol-border: rgba(138, 104, 32, 0.22);
  --ol-border-strong: rgba(138, 104, 32, 0.42);

  --ol-gold: #8a6820;
  --ol-gold-bright: #6b4f16;
  --ol-gold-dim: rgba(138, 104, 32, 0.55);
  --ol-gold-wash: rgba(138, 104, 32, 0.07);

  --ol-text-primary: #241f18;
  --ol-text-secondary: #55503f;
  --ol-text-muted: #8a8371;

  --ol-error: #a7402a;
  --ol-error-wash: rgba(167, 64, 42, 0.10);

  --ol-star-color: rgba(138, 104, 32, 0.35);
  --ol-grain-opacity: 0.035;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--ol-bg);
  color: var(--ol-text-primary);
  font-family: var(--ol-font-body);
  transition: background var(--ol-transition), color var(--ol-transition);
  min-height: 100%;
}

body {
  position: relative;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--ol-font-display);
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.02em;
}

button, input {
  font-family: inherit;
  color: inherit;
}

/* ---------- Grain overlay ---------- */

.ol-grain {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 999;
  pointer-events: none;
  mix-blend-mode: soft-light;
  opacity: var(--ol-grain-opacity);
}

/* ---------- Ambient starfield ---------- */

.rw-stars {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.rw-star {
  position: absolute;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: var(--ol-star-color);
  animation: rwTwinkle 5s ease-in-out infinite;
}

@keyframes rwTwinkle {
  0%, 100% { opacity: 0.15; }
  50% { opacity: 0.9; }
}

/* ---------- Toast notifications ---------- */

.rw-toast-region {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: min(360px, calc(100vw - 40px));
}

.rw-toast {
  background: var(--ol-surface);
  border: 1px solid var(--ol-border-strong);
  border-left: 3px solid var(--ol-gold);
  border-radius: var(--ol-radius-md);
  padding: 12px 16px;
  font-family: var(--ol-font-ui);
  font-size: 13px;
  color: var(--ol-text-primary);
  box-shadow: var(--ol-shadow-soft);
  animation: rwToastIn 220ms ease-out;
}

.rw-toast.rw-toast-error { border-left-color: var(--ol-error); }

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

.rw-toast.rw-toast-out {
  animation: rwToastOut 200ms ease-in forwards;
}

@keyframes rwToastOut {
  to { opacity: 0; transform: translateY(-8px); }
}

/* ---------- Layout shell ---------- */

.rw-header, .rw-main, .rw-footer {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.rw-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 0 20px;
  border-bottom: 1px solid var(--ol-border);
}

.rw-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.rw-brand-mark {
  font-size: 26px;
  color: var(--ol-gold);
}

.rw-brand-text h1 {
  font-size: 22px;
  color: var(--ol-text-primary);
}

.rw-brand-text p {
  margin: 2px 0 0;
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ol-text-muted);
}

/* ---------- Theme toggle ---------- */

.rw-theme-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--ol-border-strong);
  background: var(--ol-surface);
  cursor: pointer;
  transition: border-color var(--ol-transition), transform var(--ol-transition);
}

.rw-theme-toggle:hover {
  border-color: var(--ol-gold);
  transform: rotate(15deg);
}

.rw-theme-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 18px;
  color: var(--ol-gold);
  transition: opacity var(--ol-transition), transform var(--ol-transition);
}

.rw-theme-icon-sun { opacity: 0; }
.rw-theme-icon-moon { opacity: 1; }
html[data-theme="light"] .rw-theme-icon-sun { opacity: 1; }
html[data-theme="light"] .rw-theme-icon-moon { opacity: 0; }

/* ---------- Search ---------- */

.rw-search-section {
  padding: 56px 0 28px;
  text-align: center;
}

.rw-search-form { display: flex; justify-content: center; }

.rw-search-field {
  display: flex;
  width: 100%;
  max-width: 560px;
  background: var(--ol-surface);
  border: 1px solid var(--ol-border-strong);
  border-radius: var(--ol-radius-pill);
  padding: 6px 6px 6px 26px;
  transition: border-color var(--ol-transition), box-shadow var(--ol-transition);
}

.rw-search-field:focus-within {
  border-color: var(--ol-gold);
  box-shadow: 0 0 0 3px var(--ol-gold-wash);
}

.rw-search-input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  font-family: var(--ol-font-body);
  font-size: 20px;
  font-style: italic;
  color: var(--ol-text-primary);
  min-width: 0;
}

.rw-search-input::placeholder { color: var(--ol-text-muted); }

.rw-search-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--ol-radius-pill);
  padding: 13px 26px;
  background: var(--ol-gold);
  color: var(--ol-bg);
  font-family: var(--ol-font-ui);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--ol-transition), transform var(--ol-transition);
  white-space: nowrap;
}

.rw-search-button:hover { background: var(--ol-gold-bright); }
.rw-search-button:active { transform: scale(0.97); }
.rw-search-button:disabled { opacity: 0.6; cursor: default; transform: none; }

.rw-search-button-spinner {
  display: none;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid rgba(9, 8, 11, 0.35);
  border-top-color: var(--ol-bg);
  animation: rwSpin 700ms linear infinite;
}

.rw-search-button.rw-loading .rw-search-button-label { opacity: 0.55; }
.rw-search-button.rw-loading .rw-search-button-spinner { display: inline-block; }

@keyframes rwSpin {
  to { transform: rotate(360deg); }
}

/* ---------- Example chips ---------- */

.rw-examples {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
}

.rw-examples-label {
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ol-text-muted);
  margin-right: 4px;
}

.rw-example-chip, .rw-history-chip, .rw-node-chip {
  font-family: var(--ol-font-body);
  font-style: italic;
  font-size: 15px;
  color: var(--ol-text-secondary);
  background: transparent;
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius-pill);
  padding: 6px 16px;
  cursor: pointer;
  transition: border-color var(--ol-transition), color var(--ol-transition), background var(--ol-transition);
}

.rw-example-chip:hover, .rw-history-chip:hover {
  border-color: var(--ol-gold);
  color: var(--ol-gold);
  background: var(--ol-gold-wash);
}

/* ---------- History ---------- */

.rw-history-section {
  padding: 0 0 28px;
}

.rw-history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.rw-history-label {
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ol-text-muted);
}

.rw-history-clear {
  background: none;
  border: none;
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ol-text-muted);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.rw-history-clear:hover { color: var(--ol-gold); }

.rw-history-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.rw-history-chip {
  font-size: 13px;
  padding: 5px 14px;
}

/* ---------- Results toolbar ---------- */

.rw-results-section { padding: 12px 0 64px; }

.rw-results-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ol-border);
}

.rw-results-summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.rw-results-word {
  font-family: var(--ol-font-display);
  font-size: 28px;
  color: var(--ol-gold);
}

.rw-results-count {
  font-family: var(--ol-font-mono);
  font-size: 12px;
  color: var(--ol-text-muted);
  letter-spacing: 0.02em;
}

.rw-results-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.rw-limit-control {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--ol-surface);
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius-pill);
  padding: 4px;
}

.rw-limit-label {
  font-family: var(--ol-font-ui);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ol-text-muted);
  padding: 0 8px 0 10px;
}

.rw-limit-option {
  font-family: var(--ol-font-mono);
  font-size: 12px;
  border: none;
  background: transparent;
  color: var(--ol-text-secondary);
  padding: 6px 12px;
  border-radius: var(--ol-radius-pill);
  cursor: pointer;
  transition: background var(--ol-transition), color var(--ol-transition);
}

.rw-limit-option:hover { color: var(--ol-gold); }

.rw-limit-option.rw-limit-active {
  background: var(--ol-gold);
  color: var(--ol-bg);
  font-weight: 500;
}

.rw-limit-option.rw-limit-locked {
  opacity: 0.4;
  cursor: not-allowed;
}

.rw-copy-button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--ol-surface);
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius-pill);
  padding: 9px 16px;
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ol-text-secondary);
  cursor: pointer;
  transition: border-color var(--ol-transition), color var(--ol-transition);
}

.rw-copy-button:hover { border-color: var(--ol-gold); color: var(--ol-gold); }
.rw-copy-icon { font-size: 12px; }

/* ---------- Constellation ---------- */

.rw-constellation-wrap {
  margin-bottom: 48px;
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius-lg);
  background:
    radial-gradient(circle at 50% 50%, var(--ol-gold-wash) 0%, transparent 62%),
    var(--ol-bg-elevated);
  overflow: hidden;
}

.rw-constellation {
  position: relative;
  width: 100%;
  height: 420px;
  opacity: 0;
  transition: opacity 320ms ease-out;
}

.rw-constellation.rw-constellation-ready { opacity: 1; }

.rw-constellation svg.rw-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.rw-constellation svg.rw-lines line {
  stroke: var(--ol-gold);
  stroke-opacity: 0.28;
  stroke-width: 1;
}

.rw-node {
  position: absolute;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.rw-node-center {
  font-family: var(--ol-font-display);
  font-size: clamp(22px, 4vw, 34px);
  font-weight: 600;
  color: var(--ol-gold-bright);
  text-shadow: 0 0 22px var(--ol-gold-dim);
  padding: 10px 22px;
  border: 1px solid var(--ol-border-strong);
  border-radius: var(--ol-radius-pill);
  background: var(--ol-bg);
  pointer-events: none;
}

.rw-node-chip {
  font-size: 14px;
  padding: 7px 16px;
  background: var(--ol-surface);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.18);
  animation: rwNodeIn 380ms ease-out backwards;
}

.rw-node-chip:hover {
  transform: translate(-50%, -50%) scale(1.08);
  z-index: 2;
}

@keyframes rwNodeIn {
  from { opacity: 0; transform: translate(-50%, -50%) scale(0.6); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

/* ---------- Grid ---------- */

.rw-grid-wrap {}

.rw-grid-heading {
  font-size: 13px;
  font-family: var(--ol-font-ui);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ol-text-muted);
  margin-bottom: 16px;
}

.rw-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.rw-grid-chip {
  font-family: var(--ol-font-body);
  font-style: italic;
  font-size: 17px;
  color: var(--ol-text-primary);
  background: var(--ol-surface);
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius-md);
  padding: 9px 18px;
  cursor: pointer;
  transition: border-color var(--ol-transition), color var(--ol-transition), background var(--ol-transition), transform var(--ol-transition);
}

.rw-grid-chip:hover {
  border-color: var(--ol-gold);
  color: var(--ol-gold-bright);
  background: var(--ol-gold-wash);
  transform: translateY(-2px);
}

/* ---------- Empty / no-results / error states ---------- */

.rw-empty-section, .rw-noresults-section, .rw-error-section {
  text-align: center;
  padding: 64px 20px;
}

.rw-empty-glyph {
  font-size: 30px;
  color: var(--ol-gold-dim);
  margin-bottom: 16px;
}

.rw-error-glyph { color: var(--ol-error); }

.rw-empty-title {
  font-family: var(--ol-font-display);
  font-size: 20px;
  color: var(--ol-text-primary);
  margin: 0 0 8px;
}

.rw-empty-subtitle {
  font-family: var(--ol-font-body);
  font-size: 16px;
  color: var(--ol-text-secondary);
  margin: 0;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.rw-retry-button {
  margin-top: 22px;
  background: transparent;
  border: 1px solid var(--ol-border-strong);
  color: var(--ol-gold);
  font-family: var(--ol-font-ui);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--ol-radius-pill);
  padding: 10px 24px;
  cursor: pointer;
  transition: background var(--ol-transition);
}

.rw-retry-button:hover { background: var(--ol-gold-wash); }

/* ---------- Footer ---------- */

.rw-footer {
  padding: 30px 24px 48px;
  text-align: center;
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ol-text-muted);
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  .rw-header-inner { padding: 22px 0 16px; }
  .rw-search-section { padding: 34px 0 24px; }
  .rw-search-input { font-size: 17px; }
  .rw-constellation { height: 340px; }
  .rw-results-word { font-size: 22px; }
  .rw-results-toolbar { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .rw-constellation { height: 300px; }
}