:root, [data-theme="dark"] {
  --bg: #0e0d0b;
  --bg-panel: #15140f;
  --bg-input: #0a0907;
  --bg-input-focus: #0c0b08;
  --ink: #e8e2d0;
  --ink-dim: #8a8270;
  --ink-faint: #4a4538;
  --accent: #d4ff3a;
  --accent-dim: #a8cc2e;
  --accent-rgb: 212, 255, 58;
  --rule: #28251d;
  --warn: #ff7849;
  --noise-opacity: 0.4;
  --noise-blend: overlay;
  --shadow-strength: 0.4;
}

[data-theme="light"] {
  --bg: #f4f1e8;
  --bg-panel: #fbf9f1;
  --bg-input: #fffdf5;
  --bg-input-focus: #fffef9;
  --ink: #1a1814;
  --ink-dim: #6b6553;
  --ink-faint: #b8b09a;
  --accent: #5cb000;
  --accent-dim: #3d7800;
  --accent-rgb: 92, 176, 0;
  --rule: #d9d3c1;
  --warn: #c64a1a;
  --noise-opacity: 0.25;
  --noise-blend: multiply;
  --shadow-strength: 0.15;
}

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

html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

a, a:visited {
  color: var(--accent-dim);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent-dim);
  transition: color 0.15s ease, border-color 0.15s ease;
}

a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(var(--accent-rgb), 0.04), transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(var(--accent-rgb), 0.03), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: var(--noise-opacity);
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: var(--noise-blend);
}

.shell {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  padding: 48px 32px 64px;
}

header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 16px;
}

.title {
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-size: 56px;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--ink);
}

.title em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

.meta {
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-dim);
  text-align: right;
}

.meta .blink {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 8px;
  animation: pulse 2s ease-in-out infinite;
  vertical-align: middle;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 12px var(--accent); }
  50% { opacity: 0.3; box-shadow: 0 0 0 var(--accent); }
}

/* Theme toggle */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-dim);
  width: 32px;
  height: 32px;
  padding: 0;
  cursor: pointer;
  border-radius: 2px;
  margin-left: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  vertical-align: middle;
}

.theme-toggle:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}

.theme-toggle svg {
  width: 14px;
  height: 14px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.theme-toggle:hover svg {
  transform: rotate(45deg);
}

/* Show sun in dark mode (clicking switches to light), moon in light mode */
[data-theme="dark"] .theme-toggle .icon-moon,
[data-theme="light"] .theme-toggle .icon-sun {
  display: none;
}

.meta-row {
  display: flex;
  align-items: center;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 24px;
  margin-bottom: 24px;
}

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
  .title { font-size: 40px; }
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--rule);
  background: rgba(255, 255, 255, 0.015);
}

.panel-label {
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-dim);
  font-weight: 500;
}

.panel-num {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-size: 13px;
  color: var(--accent);
}

.panel-hint {
  font-size: 11px;
  color: var(--ink-faint);
  font-style: italic;
  font-family: 'Fraunces', serif;
}

textarea, .output-box {
  width: 100%;
  background: var(--bg-input);
  border: none;
  color: var(--ink);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.6;
  padding: 18px;
  resize: vertical;
  outline: none;
  tab-size: 2;
}

textarea:focus {
  background: var(--bg-input-focus);
}

textarea::placeholder {
  color: var(--ink-faint);
  font-style: italic;
}

#properties, #template {
  min-height: 260px;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px dashed var(--rule);
  border-bottom: 1px dashed var(--rule);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.ctrl-left {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preset {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-dim);
  padding: 8px 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.15s ease;
  border-radius: 2px;
}

.preset:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.05);
}

.generate {
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 14px 32px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s ease;
  position: relative;
  box-shadow: 0 0 0 0 var(--accent);
}

.generate:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 24px rgba(var(--accent-rgb), var(--shadow-strength));
}

.generate:active {
  transform: translateY(0);
}

.generate .arrow {
  display: inline-block;
  margin-left: 8px;
  transition: transform 0.2s ease;
}

.generate:hover .arrow {
  transform: translateX(4px);
}

.output-section {
  background: var(--bg-panel);
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
}

.output-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--rule);
  background: rgba(var(--accent-rgb), 0.02);
}

.output-box {
  min-height: 240px;
  white-space: pre;
  overflow: auto;
  margin: 0;
  color: var(--ink);
}

.output-box.empty {
  color: var(--ink-faint);
  font-style: italic;
  font-family: 'Fraunces', serif;
  font-size: 14px;
  white-space: normal;
}

.output-box.error {
  color: var(--warn);
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-dim);
  padding: 6px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s ease;
}

.copy-btn:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}

.copy-btn.copied {
  color: var(--accent);
  border-color: var(--accent);
}

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--ink-faint);
  flex-wrap: wrap;
  gap: 12px;
}

footer em {
  font-family: 'Fraunces', serif;
  font-style: italic;
  color: var(--ink-dim);
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-input); }
::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-faint); }