/* ==========================================================================
   Cryptogram Engine — CIO Factory / orient-luxury design system
   Near-black + grain (dark default) — parchment + brass (light toggle)
   Typefaces: Cinzel (display) · Cormorant Garamond (body) · Syne (UI labels)
              · IBM Plex Mono (data/cipher values)
   ========================================================================== */

:root {
  --ol-bg: #09080b;
  --ol-surface: #131015;
  --ol-surface-raised: #1c1820;
  --ol-gold: #c9a84c;
  --ol-gold-bright: #e0c268;
  --ol-gold-dim: rgba(201, 168, 76, 0.4);
  --ol-gold-faint: rgba(201, 168, 76, 0.14);
  --ol-ink: #e8e2d4;
  --ol-ink-dim: #a89f8e;
  --ol-ink-faint: #6c655a;
  --ol-success: #7a9b6e;
  --ol-success-bg: rgba(122, 155, 110, 0.16);
  --ol-error: #b06a58;
  --ol-error-bg: rgba(176, 106, 88, 0.16);
  --ol-border: rgba(201, 168, 76, 0.18);
  --ol-shadow: rgba(0, 0, 0, 0.5);

  --ol-font-display: 'Cinzel', 'Times New Roman', 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: 3px;
  --ol-radius-md: 6px;
  --ol-radius-lg: 10px;
}

[data-theme='light'] {
  --ol-bg: #f0ebe0;
  --ol-surface: #e6ddc9;
  --ol-surface-raised: #ddd2b8;
  --ol-gold: #8a6820;
  --ol-gold-bright: #6b4f18;
  --ol-gold-dim: rgba(138, 104, 32, 0.35);
  --ol-gold-faint: rgba(138, 104, 32, 0.12);
  --ol-ink: #2a2420;
  --ol-ink-dim: #5a5044;
  --ol-ink-faint: #8c8272;
  --ol-success: #4a6b3e;
  --ol-success-bg: rgba(74, 107, 62, 0.14);
  --ol-error: #7a3428;
  --ol-error-bg: rgba(122, 52, 40, 0.14);
  --ol-border: rgba(138, 104, 32, 0.28);
  --ol-shadow: rgba(60, 50, 30, 0.22);
}

/* ---- Reset --------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--ol-bg);
  color: var(--ol-ink);
  font-family: var(--ol-font-body);
  font-size: 18px;
  line-height: 1.5;
  min-height: 100vh;
  transition: background-color 0.35s ease, color 0.35s ease;
  position: relative;
}

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

p {
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
}

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

::selection {
  background: var(--ol-gold-dim);
  color: var(--ol-ink);
}

/* Visible keyboard focus everywhere */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--ol-gold);
  outline-offset: 2px;
}

/* ---- Grain overlay -------------------------------------------------- */
.ol-grain {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 220px 220px;
}

[data-theme='light'] .ol-grain {
  opacity: 0.3;
  mix-blend-mode: multiply;
}

/* ---- Layout ----------------------------------------------------------- */
.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  position: relative;
  z-index: 1;
}

/* ---- Header ---------------------------------------------------------- */
.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--ol-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-seal {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1.5px solid var(--ol-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ol-font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--ol-gold);
  letter-spacing: 0.5px;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 3px var(--ol-bg), inset 0 0 0 4px var(--ol-gold-dim);
}

.brand-text h1 {
  font-size: 30px;
  letter-spacing: 1px;
  color: var(--ol-ink);
}

.brand-text .tagline {
  font-family: var(--ol-font-body);
  font-style: italic;
  color: var(--ol-ink-dim);
  font-size: 17px;
  margin-top: 4px;
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--ol-border);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ol-gold);
  transition: background-color 0.2s ease, transform 0.2s ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--ol-gold-faint);
  transform: rotate(12deg);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* ---- Grid layout: sidebar + main -------------------------------------- */
.engine {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 28px;
  align-items: start;
}

@media (max-width: 900px) {
  .engine {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--ol-surface);
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius-lg);
  padding: 22px;
  box-shadow: 0 12px 28px var(--ol-shadow);
}

.panel + .panel {
  margin-top: 22px;
}

.panel-title {
  font-family: var(--ol-font-ui);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--ol-gold);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-title .sub {
  font-family: var(--ol-font-body);
  font-style: italic;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  color: var(--ol-ink-faint);
  font-size: 13px;
}

/* ---- Mode tabs --------------------------------------------------------- */
.mode-tabs {
  display: flex;
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius-md);
  overflow: hidden;
  margin-bottom: 16px;
}

.mode-tab {
  flex: 1;
  background: transparent;
  border: none;
  padding: 10px 8px;
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ol-ink-dim);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.mode-tab + .mode-tab {
  border-left: 1px solid var(--ol-border);
}

.mode-tab[aria-selected='true'] {
  background: var(--ol-gold-faint);
  color: var(--ol-gold-bright);
}

.custom-text-field {
  display: none;
}

.custom-text-field.is-active {
  display: block;
}

.custom-text-field textarea {
  width: 100%;
  min-height: 96px;
  resize: vertical;
  background: var(--ol-surface-raised);
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius-md);
  color: var(--ol-ink);
  padding: 10px 12px;
  font-size: 17px;
  line-height: 1.4;
}

.char-count {
  display: block;
  text-align: right;
  font-family: var(--ol-font-mono);
  font-size: 11px;
  color: var(--ol-ink-faint);
  margin-top: 6px;
}

.char-count.is-limit {
  color: var(--ol-error);
}

.random-note {
  font-family: var(--ol-font-body);
  font-style: italic;
  font-size: 15px;
  color: var(--ol-ink-dim);
  padding: 8px 2px 4px;
}

/* ---- Wax-seal primary button -------------------------------------------- */
.seal-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin-top: 16px;
  padding: 14px 16px;
  border: none;
  border-radius: 50px;
  background: radial-gradient(circle at 32% 28%, var(--ol-gold-bright), var(--ol-gold) 60%, #7a5f21 130%);
  color: #1a1408;
  font-family: var(--ol-font-ui);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  box-shadow: 0 6px 16px var(--ol-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.seal-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px var(--ol-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.seal-btn:active {
  transform: translateY(0);
}

.seal-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.seal-btn svg {
  width: 16px;
  height: 16px;
}

.status-line {
  min-height: 20px;
  margin-top: 10px;
  font-family: var(--ol-font-ui);
  font-size: 13px;
  letter-spacing: 0.2px;
}

.status-line.is-error {
  color: var(--ol-error);
}

.status-line.is-busy {
  color: var(--ol-ink-dim);
}

/* ---- Stats strip --------------------------------------------------------- */
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stat {
  flex: 1;
  min-width: 76px;
  text-align: center;
  background: var(--ol-surface-raised);
  border: 1px solid var(--ol-border);
  border-radius: var(--ol-radius-md);
  padding: 10px 6px;
}

.stat .val {
  display: block;
  font-family: var(--ol-font-mono);
  font-size: 18px;
  color: var(--ol-gold-bright);
}

.stat .lbl {
  display: block;
  font-family: var(--ol-font-ui);
  font-size: 9px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--ol-ink-faint);
  margin-top: 3px;
}

/* ---- Cipher wheel (signature element) ----------------------------------- */
.wheel-wrap {
  display: flex;
  justify-content: center;
  padding: 12px 0 4px;
}

.cipher-wheel {
  position: relative;
  width: 260px;
  height: 260px;
  max-width: 100%;
  border-radius: 50%;
}

.cipher-wheel .ring-outer,
.cipher-wheel .ring-inner {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  border: 1px solid var(--ol-border);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.cipher-wheel .ring-outer {
  width: 92%;
  height: 92%;
}

.cipher-wheel .ring-inner {
  width: 58%;
  height: 58%;
  border-style: dashed;
}

.cipher-wheel .hub {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 34%;
  height: 34%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--ol-surface-raised);
  border: 1px solid var(--ol-gold-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: var(--ol-font-ui);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--ol-ink-faint);
  text-transform: uppercase;
  line-height: 1.3;
  padding: 4px;
}

.wheel-letter {
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 34px;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 6px;
  line-height: 1.05;
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.wheel-letter .wl-cipher {
  font-family: var(--ol-font-mono);
  font-size: 13px;
  color: var(--ol-gold);
}

.wheel-letter .wl-guess {
  font-family: var(--ol-font-display);
  font-size: 11px;
  color: var(--ol-ink-faint);
  margin-top: 1px;
}

.wheel-letter.is-active {
  cursor: pointer;
}

.wheel-letter.is-active:hover {
  background: var(--ol-gold-faint);
  transform: translate(-50%, -50%) scale(1.12);
}

.wheel-letter.is-inactive {
  opacity: 0.22;
}

.wheel-letter.is-solved .wl-guess {
  color: var(--ol-success);
}

.wheel-letter.is-pulse {
  animation: wheelPulse 0.6s ease;
}

@keyframes wheelPulse {
  0% { background: var(--ol-gold-dim); }
  100% { background: transparent; }
}

/* ---- Frequency ledger --------------------------------------------------- */
.freq-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.freq-chip {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--ol-font-mono);
  font-size: 11px;
  color: var(--ol-ink-dim);
  background: var(--ol-surface-raised);
  border: 1px solid var(--ol-border);
  border-radius: 4px;
  padding: 3px 7px;
}

.freq-chip .n {
  color: var(--ol-gold);
}

/* ---- Puzzle grid --------------------------------------------------------- */
.puzzle-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--ol-ink-faint);
  font-family: var(--ol-font-body);
  font-style: italic;
  font-size: 20px;
}

.puzzle-empty .empty-seal {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  border: 1.5px dashed var(--ol-border);
}

.puzzle-board {
  display: none;
}

.puzzle-board.is-visible {
  display: block;
}

.puzzle-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  padding: 8px 4px 20px;
  line-height: 1;
}

.word-group {
  display: inline-flex;
  align-items: flex-end;
  margin: 0 14px 18px 0;
}

.letterbox {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 34px;
  margin-right: 3px;
}

.letterbox:last-child {
  margin-right: 0;
}

.lb-input {
  width: 30px;
  height: 34px;
  text-align: center;
  text-transform: uppercase;
  background: transparent;
  border: none;
  border-bottom: 1.5px solid var(--ol-gold-dim);
  color: var(--ol-ink);
  font-family: var(--ol-font-display);
  font-size: 19px;
  font-weight: 600;
  padding: 0;
  border-radius: 0;
  transition: border-color 0.2s ease, background-color 0.3s ease;
}

.lb-input:focus {
  border-color: var(--ol-gold);
  outline: none;
  background: var(--ol-gold-faint);
}

.lb-input.is-correct {
  background: var(--ol-success-bg);
  border-color: var(--ol-success);
}

.lb-input.is-incorrect {
  background: var(--ol-error-bg);
  border-color: var(--ol-error);
}

.lb-input.is-hinted {
  color: var(--ol-gold-bright);
}

.lb-input.is-pulse-target {
  background: var(--ol-gold-dim);
  transition: background-color 0.5s ease;
}

.lb-cipher {
  font-family: var(--ol-font-mono);
  font-size: 11px;
  color: var(--ol-ink-faint);
  margin-top: 3px;
  letter-spacing: 0.5px;
}

.lb-punct {
  display: flex;
  align-items: flex-end;
  height: 34px;
  padding-bottom: 6px;
  font-family: var(--ol-font-body);
  font-size: 20px;
  color: var(--ol-ink-dim);
  margin-right: 2px;
}

/* ---- Action buttons row -------------------------------------------------- */
.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 6px;
  border-top: 1px solid var(--ol-border);
  margin-top: 10px;
}

.brass-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: transparent;
  border: 1px solid var(--ol-gold-dim);
  border-radius: var(--ol-radius-md);
  padding: 9px 14px;
  color: var(--ol-gold);
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.brass-btn:hover {
  background: var(--ol-gold-faint);
  border-color: var(--ol-gold);
}

.brass-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.brass-btn.is-danger {
  border-color: var(--ol-error);
  color: var(--ol-error);
}

.brass-btn.is-danger:hover {
  background: var(--ol-error-bg);
}

.brass-btn svg {
  width: 14px;
  height: 14px;
}

/* ---- Confirm-reveal inline panel ----------------------------------------- */
.confirm-panel {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding: 12px 14px;
  background: var(--ol-error-bg);
  border: 1px solid var(--ol-error);
  border-radius: var(--ol-radius-md);
  font-family: var(--ol-font-ui);
  font-size: 12px;
  color: var(--ol-ink);
}

.confirm-panel.is-visible {
  display: flex;
  flex-wrap: wrap;
}

.confirm-panel button {
  border: 1px solid var(--ol-error);
  background: transparent;
  color: var(--ol-error);
  border-radius: 4px;
  padding: 5px 10px;
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.confirm-panel button.confirm-yes {
  background: var(--ol-error);
  color: var(--ol-bg);
}

/* ---- Solved overlay stamp ------------------------------------------------- */
.solved-overlay {
  display: none;
  margin-top: 22px;
  padding: 26px 22px;
  text-align: center;
  border: 1px solid var(--ol-gold);
  border-radius: var(--ol-radius-lg);
  background: var(--ol-surface-raised);
  position: relative;
  overflow: hidden;
}

.solved-overlay.is-visible {
  display: block;
}

.solved-stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  border: 3px double var(--ol-gold);
  color: var(--ol-gold);
  font-family: var(--ol-font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 2px;
  text-transform: uppercase;
  transform: rotate(-8deg) scale(0.6);
  opacity: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .solved-overlay.is-visible .solved-stamp {
    animation: stampDown 0.5s cubic-bezier(0.2, 0.9, 0.3, 1.2) forwards;
  }
}

@media (prefers-reduced-motion: reduce) {
  .solved-overlay.is-visible .solved-stamp {
    opacity: 1;
    transform: rotate(-8deg) scale(1);
  }
}

@keyframes stampDown {
  0% { opacity: 0; transform: rotate(-8deg) scale(1.8); }
  60% { opacity: 1; transform: rotate(-8deg) scale(0.92); }
  100% { opacity: 1; transform: rotate(-8deg) scale(1); }
}

.solved-quote {
  margin-top: 20px;
  font-family: var(--ol-font-body);
  font-style: italic;
  font-size: 22px;
  color: var(--ol-ink);
  line-height: 1.5;
}

.solved-stats {
  margin-top: 16px;
  display: flex;
  justify-content: center;
  gap: 26px;
  flex-wrap: wrap;
}

.solved-stats .stat-mini {
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ol-ink-faint);
}

.solved-stats .stat-mini strong {
  display: block;
  font-family: var(--ol-font-mono);
  font-size: 17px;
  color: var(--ol-gold-bright);
  text-transform: none;
  letter-spacing: 0;
  margin-top: 2px;
}

/* ---- Toast ---------------------------------------------------------------- */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  background: var(--ol-surface-raised);
  border: 1px solid var(--ol-gold);
  border-radius: var(--ol-radius-md);
  padding: 12px 18px;
  font-family: var(--ol-font-ui);
  font-size: 13px;
  color: var(--ol-ink);
  box-shadow: 0 10px 24px var(--ol-shadow);
  transform: translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.toast.is-visible {
  transform: translateY(0);
  opacity: 1;
}

/* ---- Footer ---------------------------------------------------------- */
.site-footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--ol-border);
  text-align: center;
  font-family: var(--ol-font-ui);
  font-size: 11px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--ol-ink-faint);
}

.site-footer span {
  color: var(--ol-gold);
}

/* ---- Responsive ------------------------------------------------------- */
@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

  .wrap {
    padding: 24px 16px 60px;
  }

  .brand-text h1 {
    font-size: 24px;
  }

  .site-header {
    flex-wrap: wrap;
  }

  .cipher-wheel {
    width: 210px;
    height: 210px;
  }

  .wheel-letter {
    width: 24px;
    height: 28px;
  }

  .wheel-letter .wl-cipher {
    font-size: 11px;
  }

  .letterbox {
    width: 26px;
  }

  .lb-input {
    width: 22px;
    height: 30px;
    font-size: 16px;
  }

  .solved-stamp {
    width: 100px;
    height: 100px;
    font-size: 15px;
  }
}