:root {
  --ui-card-bg: rgba(255, 245, 235, 0.82);
  --ui-card-border: rgba(209, 153, 117, 0.4);
  --ui-text-primary: #734933;
  --ui-text-muted: #b07a55;
  --ui-text-label: #734933;
  --ui-input-bg: rgba(255, 255, 255, 0.85);
  --ui-input-border: #d19975;
  --ui-input-border-focus: #ce5c03;
  --ui-input-focus-ring: rgba(206, 92, 3, 0.12);
  --ui-input-placeholder: rgba(115, 73, 51, 0.38);
  --ui-checkbox-bg: rgba(255, 255, 255, 0.85);
  --ui-checkbox-border: #d19975;
  --ui-checkbox-checked: #734933;
  --ui-link: #ce5c03;
  --ui-link-hover: #fd5a01;
  --ui-dropdown-bg: #fff;
  --ui-dropdown-border: #ce5c03;
  --ui-dropdown-shadow: rgba(115, 73, 51, 0.18);
  --ui-dropdown-option-hover: rgba(206, 92, 3, 0.06);
  --ui-dropdown-option-selected: rgba(115, 73, 51, 0.05);
  --ui-avatar-gradient-start: #ffe6c1;
  --ui-avatar-gradient-end: #d19975;
  --ui-avatar-shadow: rgba(209, 153, 117, 0.3);
  --ui-avatar-blue-start: #f0c090;
  --ui-avatar-blue-end: #ce5c03;
  --ui-btn-gradient-start: #734933;
  --ui-btn-gradient-end: #fd5a01;
  --ui-btn-shadow: rgba(115, 73, 51, 0.28);
  --ui-btn-shadow-hover: rgba(115, 73, 51, 0.32);
  --ui-btn-text: #fff;
  --ui-toast-bg: #734933;
  --ui-toast-text: #fff;
  --ui-toast-dot: #ffe6c1;
  --ui-divider-border: #d19975;
  --ui-eye-icon: #734933;

  /* Pattern button — tách biệt khỏi --ui-text-primary để không bị ghi đè bởi theme tối */
  --tp-pat-label-color: #734933;
  --tp-pat-star-color: #ce5c03;

  --bg-body: #fff8f0;
  --bg-blob-1: #734933;
  --bg-blob-2: #fd5a01;
  --bg-blob-3: #ffe6c1;
  --bg-heart: #734933;

  --transition-default: 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-pattern: 0.38s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

body {
  background-color: var(--bg-body);
  transition: background-color var(--transition-default);
}

.blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
  pointer-events: none;
  animation: drift 18s ease-in-out infinite alternate;
}

body[data-pattern="checker"] .blob,
body[data-pattern="diagonal"] .blob,
body[data-pattern="dotted"] .blob,
body[data-pattern="wave"] .blob,
body[data-pattern="simple"] .blob {
  opacity: 0;
}

.blob-1 {
  background: var(--bg-blob-1);
  width: 420px;
  height: 420px;
  top: -120px;
  left: -100px;
  animation-delay: 0s;
}

.blob-2 {
  background: var(--bg-blob-2);
  width: 320px;
  height: 320px;
  bottom: -80px;
  right: -80px;
  animation-delay: -4s;
}

.blob-3 {
  background: var(--bg-blob-3);
  width: 200px;
  height: 200px;
  top: 40%;
  left: 60%;
  animation-delay: -8s;
}

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(30px, 20px) scale(1.05); }
}

.bg-checker {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 1;
  will-change: opacity;
  transition: opacity 0.55s cubic-bezier(0.4,0,0.2,1);
}

body[data-pattern="checker"] .bg-checker,
body[data-pattern="diagonal"] .bg-checker,
body[data-pattern="dotted"] .bg-checker,
body[data-pattern="wave"] .bg-checker {
  opacity: 1;
}


.tp-panel {
  position: fixed;
  width: 380px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(24px);
  border: 1px solid var(--ui-input-border);
  border-radius: 22px;
  box-shadow: 0 2px 4px rgba(115, 73, 51, 0.04), 0 12px 40px rgba(115, 73, 51, 0.14);
  padding: 18px 18px 16px;
  z-index: 100000;
  opacity: 0;
  transform: translateY(-8px) scale(0.96);
  transform-origin: top center;
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.tp-panel.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.tp-section-label {
  font-family: 'Gotu', sans-serif;
  font-size: 0.56rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ui-text-muted);
  padding: 0 2px 10px;
}

.tp-divider {
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(209, 153, 117, 0.8), transparent);
  margin: 8px 0 14px;
}

.tp-colors {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding: 0 0 2px;
}

.tp-color-swatch {
  aspect-ratio: 1;
  width: calc(100% - 19px);
  margin: auto;
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid transparent;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.tp-color-swatch:hover {
  transform: scale(1.12);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.16);
}

.tp-color-swatch.active {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--ui-input-border-focus);
  transform: scale(1.08);
}

.tp-swatch-dot {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), 0 2px 8px rgba(0, 0, 0, 0.14);
}

.tp-patterns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  box-sizing: border-box;
}

.tp-pattern-opt {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 11px;
  cursor: pointer;
  border: none;
  outline: 1.5px solid rgba(209, 153, 117, 0.55);
  background: rgba(255, 255, 255, 0.6);
  transition: background var(--transition-fast), outline-color var(--transition-fast);
}

.tp-pattern-opt:hover {
  outline-color: var(--ui-input-border-focus);
  background: rgba(255, 255, 255, 0.9);
}

.tp-pattern-opt.active {
  background: linear-gradient(135deg, var(--ui-btn-gradient-start) 0%, var(--ui-btn-gradient-end) 100%);
  outline: none;
  color: #fff;
}

.tp-pat-btn-label {
  font-family: 'Arima', cursive;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--tp-pat-label-color);
  transition: color var(--transition-fast);
}

.tp-pattern-opt.active .tp-pat-btn-label {
  color: #fff;
}

.tp-pattern-opt .btn-star {
  color: var(--tp-pat-star-color);
  width: 13px;
  height: 13px;
}

.tp-pattern-opt.active .btn-star {
  color: rgba(255, 255, 255, 0.85);
}

.tp-slider-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 2px 0;
}

.tp-slider-icon {
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ui-text-muted);
  width: 16px;
  text-align: center;
}

.tp-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 4px;
  border-radius: 99px;
  background: linear-gradient(to right, var(--ui-input-border-focus) 50%, rgba(209, 153, 117, 0.6) 50%);
  outline: none;
  cursor: pointer;
}

.tp-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--ui-input-border-focus);
  box-shadow: 0 2px 8px rgba(115, 73, 51, 0.18);
  cursor: pointer;
}
/* Soft-tech rings hover */
#softTechRings svg {
  cursor: default;
  transition: filter 0.4s ease;
}
#softTechRings svg:hover {
  filter: drop-shadow(0 0 10px var(--ui-btn-shadow));
}
#softTechRings svg:hover circle {
  transition: stroke 0.4s ease;
}