/* ─── Theme Variables ──────────────────────────────────────────────────────── */

:root, [data-theme="dark"] {
  --bg: #0d0a07;
  --surface: #1a1410;
  --surface2: #241c15;
  --border: #4a3520;
  --gold: #c8922a;
  --gold-light: #e8b84b;
  --gold-dim: #7a5518;
  --amber: #d4621a;
  --green: #4a8c3f;
  --green-light: #6abf5e;
  --blue: #2a6080;
  --blue-light: #4a9fcc;
  --purple: #6a3080;
  --purple-light: #aa60cc;
  --text: #d4c4a0;
  --text-dim: #7a6a50;
  --red: #8c2a2a;
  --red-light: #cc4a4a;
  --header-font: 'Palatino Linotype', Palatino, 'Book Antiqua', serif;
  --body-font: Georgia, 'Times New Roman', serif;
  --mono-font: 'Courier New', Courier, monospace;
}

[data-theme="light"] {
  --bg: #f5f0e8;
  --surface: #fffdf7;
  --surface2: #f0ead8;
  --border: #c8b898;
  --gold: #5a8a3a;
  --gold-light: #3a6a1a;
  --gold-dim: #8aaa6a;
  --amber: #c87820;
  --green: #3a7a2a;
  --green-light: #2a5a1a;
  --blue: #3a6a9a;
  --blue-light: #2a4a7a;
  --purple: #8a5a9a;
  --purple-light: #6a3a7a;
  --text: #3a2a1a;
  --text-dim: #7a6a5a;
  --red: #9a3a2a;
  --red-light: #7a2a1a;
  --header-font: Georgia, 'Times New Roman', serif;
  --body-font: Georgia, 'Times New Roman', serif;
  --mono-font: 'Courier New', Courier, monospace;
}

[data-theme="kittens"] {
  --bg: #fff0f8;
  --surface: #ffffff;
  --surface2: #ffe8f5;
  --border: #ffb8e0;
  --gold: #e0508a;
  --gold-light: #c82870;
  --gold-dim: #ffaad0;
  --amber: #ff8c42;
  --green: #48b848;
  --green-light: #28a028;
  --blue: #42a0e8;
  --blue-light: #1880c8;
  --purple: #b860d8;
  --purple-light: #9838b8;
  --text: #4a1a3a;
  --text-dim: #b080a0;
  --red: #e84040;
  --red-light: #c82020;
  --header-font: Georgia, 'Times New Roman', serif;
  --body-font: Georgia, 'Times New Roman', serif;
  --mono-font: 'Courier New', Courier, monospace;
}

[data-theme="plain"] {
  --bg: #f8f8f8;
  --surface: #ffffff;
  --surface2: #f0f0f0;
  --border: #cccccc;
  --gold: #444444;
  --gold-light: #222222;
  --gold-dim: #999999;
  --amber: #cc6600;
  --green: #336633;
  --green-light: #224422;
  --blue: #336699;
  --blue-light: #224477;
  --purple: #663366;
  --purple-light: #442244;
  --text: #222222;
  --text-dim: #888888;
  --red: #993333;
  --red-light: #772222;
  --header-font: Arial, Helvetica, sans-serif;
  --body-font: Arial, Helvetica, sans-serif;
  --mono-font: 'Courier New', Courier, monospace;
}

/* ─── Base ─────────────────────────────────────────────────────────────────── */

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body-font);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.3s, color 0.3s;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 20% 80%, rgba(200,146,42,0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(74,48,128,0.04) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="kittens"] body::before {
  background-image:
    radial-gradient(ellipse at 20% 80%, rgba(255,180,220,0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(180,220,255,0.15) 0%, transparent 60%);
}

[data-theme="light"] body::before,
[data-theme="plain"] body::before { display: none; }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
  position: relative;
  z-index: 1;
}

/* ─── Header ───────────────────────────────────────────────────────────────── */

header {
  text-align: center;
  padding: 1.5rem 0 1rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

header h1 {
  font-family: var(--header-font);
  font-size: 2rem;
  color: var(--gold-light);
  letter-spacing: 0.05em;
  text-shadow: 0 0 30px rgba(200,146,42,0.3);
}

[data-theme="light"] header h1,
[data-theme="plain"] header h1 { text-shadow: none; }

[data-theme="kittens"] header h1 {
  text-shadow: 0 2px 8px rgba(230,80,140,0.3);
  letter-spacing: 0.08em;
}

header .subtitle {
  font-style: italic;
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

/* ─── Skin Switcher ────────────────────────────────────────────────────────── */

.skin-switcher {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.skin-btn {
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  color: var(--text-dim);
  font-family: var(--body-font);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.skin-btn:hover { border-color: var(--gold); color: var(--gold-light); }

.skin-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--bg);
  font-weight: bold;
}

[data-theme="kittens"] .skin-btn.active { color: #fff; }

/* ─── Essence Bar ──────────────────────────────────────────────────────────── */

.essence-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin: 1rem 0;
  padding: 0.75rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  flex-wrap: wrap;
}

.essence-total {
  font-family: var(--header-font);
  font-size: 1.4rem;
  color: var(--gold-light);
  text-shadow: 0 0 15px rgba(200,146,42,0.4);
}

[data-theme="light"] .essence-total,
[data-theme="plain"] .essence-total { text-shadow: none; }

.essence-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.essence-rate {
  font-family: var(--mono-font);
  font-size: 0.85rem;
  color: var(--green-light);
}

.total-section {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.total-earned {
  font-family: var(--mono-font);
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ─── Layout ───────────────────────────────────────────────────────────────── */

.game-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .game-layout { grid-template-columns: 1fr; }
}

.section-title {
  font-family: var(--header-font);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--gold-dim);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

/* ─── Reagent Cards ────────────────────────────────────────────────────────── */

.reagents-panel, .upgrades-panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.reagent-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.reagent-card.locked  { opacity: 0.5; filter: grayscale(0.7); }

.reagent-card.active-glow {
  border-color: var(--gold);
  box-shadow: 0 0 12px rgba(200,146,42,0.15) inset;
}

.reagent-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.reagent-icon {
  font-size: 1.4rem;
  width: 1.8rem;
  text-align: center;
}

.reagent-name {
  font-family: var(--header-font);
  font-size: 0.85rem;
  color: var(--gold-light);
  flex: 1;
}

.reagent-count {
  font-family: var(--mono-font);
  font-size: 0.85rem;
  color: var(--text-dim);
}

.reagent-desc {
  font-style: italic;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.6rem;
}

/* Progress bar */
.progress-wrap {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  height: 8px;
  margin-bottom: 0.6rem;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: 2px;
  transition: width 0.1s linear;
}

/* Collect button */
.collect-btn {
  width: 100%;
  padding: 0.45rem;
  border: 1px solid;
  border-radius: 3px;
  font-family: var(--header-font);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
  overflow: hidden;
}

.collect-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  font-style: italic;
}

.collect-btn:not(:disabled):hover  { filter: brightness(1.12); }
.collect-btn:not(:disabled):active { filter: brightness(0.9); }

/* Colour variants */
.c-amber { color: var(--amber); border-color: var(--amber); background: rgba(212,98,26,0.07); }
.c-amber .progress-bar { background: var(--amber); }
.c-amber .collect-btn  { color: var(--amber); border-color: var(--amber); background: rgba(212,98,26,0.09); }

.c-green { color: var(--green-light); border-color: var(--green); background: rgba(74,140,63,0.07); }
.c-green .progress-bar { background: var(--green-light); }
.c-green .collect-btn  { color: var(--green-light); border-color: var(--green); background: rgba(74,140,63,0.09); }

.c-blue  { color: var(--blue-light); border-color: var(--blue); background: rgba(42,96,128,0.07); }
.c-blue  .progress-bar { background: var(--blue-light); }
.c-blue  .collect-btn  { color: var(--blue-light); border-color: var(--blue); background: rgba(42,96,128,0.09); }

.c-purple { color: var(--purple-light); border-color: var(--purple); background: rgba(106,48,128,0.07); }
.c-purple .progress-bar { background: var(--purple-light); }
.c-purple .collect-btn  { color: var(--purple-light); border-color: var(--purple); background: rgba(106,48,128,0.09); }

.c-gold  { color: var(--gold-light); border-color: var(--gold); background: rgba(200,146,42,0.07); }
.c-gold  .progress-bar { background: var(--gold-light); }
.c-gold  .collect-btn  { color: var(--gold-light); border-color: var(--gold); background: rgba(200,146,42,0.09); }

.auto-badge {
  font-family: var(--mono-font);
  font-size: 0.62rem;
  color: var(--green-light);
  background: rgba(74,140,63,0.15);
  border: 1px solid var(--green);
  border-radius: 2px;
  padding: 0 0.3em;
  margin-left: 0.4rem;
  vertical-align: middle;
}

/* ─── Upgrade Cards ────────────────────────────────────────────────────────── */

.upgrade-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.upgrade-card.purchased { opacity: 0.45; border-style: dashed; }
.upgrade-card.locked    { opacity: 0.28; }

.upgrade-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.upgrade-name-text {
  font-family: var(--header-font);
  font-size: 0.8rem;
  color: var(--gold-light);
}

.upgrade-cost-text {
  font-family: var(--mono-font);
  font-size: 0.75rem;
  color: var(--gold);
  white-space: nowrap;
}

.upgrade-desc-text {
  font-style: italic;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.upgrade-btn {
  padding: 0.4rem;
  border: 1px solid var(--gold-dim);
  border-radius: 3px;
  background: rgba(200,146,42,0.07);
  color: var(--gold);
  font-family: var(--header-font);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all 0.15s;
}

.upgrade-btn:hover:not(:disabled) { border-color: var(--gold-light); color: var(--gold-light); filter: brightness(1.1); }
.upgrade-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* ─── Save Panel ───────────────────────────────────────────────────────────── */

.save-panel {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem;
}

.save-code-row {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.5rem;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.6rem 0.75rem;
}

.save-panel .label {
  font-family: var(--header-font);
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  margin-right: 0.25rem;
}

.save-btn {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--gold-dim);
  border-radius: 3px;
  background: rgba(200,146,42,0.07);
  color: var(--gold);
  font-family: var(--header-font);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.save-btn:hover  { border-color: var(--gold-light); color: var(--gold-light); }
.save-btn.danger { border-color: var(--red); color: var(--red-light); background: rgba(140,42,42,0.07); }
.save-btn.danger:hover { border-color: var(--red-light); }

.save-code {
  flex: 1;
  min-width: 150px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-family: var(--mono-font);
  font-size: 0.72rem;
  padding: 0.4rem 0.6rem;
  resize: none;
  height: 2.4rem;
}

/* ─── Log ──────────────────────────────────────────────────────────────────── */

.log-panel {
  grid-column: 1 / -1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem;
  height: 100px;
  overflow-y: auto;
  font-family: var(--mono-font);
  font-size: 0.72rem;
  color: var(--text-dim);
  display: flex;
  flex-direction: column-reverse;
  gap: 0.15rem;
}

.log-entry           { line-height: 1.4; }
.log-entry.highlight { color: var(--gold-light); }
.log-entry.upgrade-log { color: var(--purple-light); }

/* ─── Particles ────────────────────────────────────────────────────────────── */

.particle {
  position: fixed;
  pointer-events: none;
  font-family: var(--mono-font);
  font-size: 0.85rem;
  font-weight: bold;
  z-index: 999;
  animation: floatUp 0.9s ease-out forwards;
}

@keyframes floatUp {
  0%   { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-60px) scale(0.8); }
}

/* ─── Pulsing ready state ──────────────────────────────────────────────────── */

@keyframes pulseReady {
  0%, 100% { box-shadow: 0 0 0 rgba(200,146,42,0); }
  50%       { box-shadow: 0 0 10px rgba(200,146,42,0.3); }
}

.reagent-card.ready { animation: pulseReady 1.2s ease-in-out infinite; }

[data-theme="kittens"] .reagent-card.ready {
  animation: pulseKitten 1.0s ease-in-out infinite;
}

@keyframes pulseKitten {
  0%, 100% { box-shadow: 0 0 0 rgba(230,80,140,0); }
  50%       { box-shadow: 0 0 12px rgba(230,80,140,0.4); }
}

/* ─── Toast ────────────────────────────────────────────────────────────────── */

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface2);
  border: 1px solid var(--gold);
  color: var(--gold-light);
  font-family: var(--header-font);
  font-size: 0.85rem;
  padding: 0.7rem 1.5rem;
  border-radius: 4px;
  z-index: 100;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  animation: toastIn 0.3s ease-out, toastOut 0.4s ease-in 2.6s forwards;
}

@keyframes toastIn  { from { opacity: 0; transform: translateX(-50%) translateY(16px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
@keyframes toastOut { to   { opacity: 0; transform: translateX(-50%) translateY(16px); } }

/* ─── Scrollbar ────────────────────────────────────────────────────────────── */

::-webkit-scrollbar       { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ─── New collector colour variants ───────────────────────────────────────── */

.c-void   { color: #c39bd3; border-color: #9b59b6; background: rgba(155,89,182,0.07); }
.c-void   .progress-bar { background: #9b59b6; }
.c-void   .collect-btn  { color: #c39bd3; border-color: #9b59b6; background: rgba(155,89,182,0.09); }

.c-dragon { color: #f1948a; border-color: #e74c3c; background: rgba(231,76,60,0.07); }
.c-dragon .progress-bar { background: #e74c3c; }
.c-dragon .collect-btn  { color: #f1948a; border-color: #e74c3c; background: rgba(231,76,60,0.09); }

.c-celest { color: #f9e79f; border-color: #f1c40f; background: rgba(241,196,15,0.07); }
.c-celest .progress-bar { background: #f1c40f; }
.c-celest .collect-btn  { color: #f9e79f; border-color: #f1c40f; background: rgba(241,196,15,0.09); }

/* ─── Prestige panel ───────────────────────────────────────────────────────── */

.prestige-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 1rem;
  margin-bottom: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  flex-wrap: wrap;
  min-height: 2.4rem;
}

.prestige-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-style: italic;
}

.prestige-label strong {
  color: var(--gold-light);
  font-style: normal;
}

.prestige-btn {
  padding: 0.4rem 1rem;
  border: 1px solid var(--gold);
  border-radius: 3px;
  background: rgba(200,146,42,0.12);
  color: var(--gold-light);
  font-family: var(--header-font);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.15s;
  animation: prestigePulse 2s ease-in-out infinite;
}

.prestige-btn:hover {
  background: rgba(200,146,42,0.25);
  border-color: var(--gold-light);
}

@keyframes prestigePulse {
  0%, 100% { box-shadow: 0 0 0 rgba(200,146,42,0); }
  50%       { box-shadow: 0 0 12px rgba(200,146,42,0.5); }
}

[data-theme="kittens"] .prestige-btn {
  border-color: var(--gold);
  animation: kittensPrestigePulse 1.5s ease-in-out infinite;
}

@keyframes kittensPrestigePulse {
  0%, 100% { box-shadow: 0 0 0 rgba(230,80,140,0); }
  50%       { box-shadow: 0 0 14px rgba(230,80,140,0.6); }
}