/* =========================================
   NeoStick Customizer - Dark Theme Styles (EN)
   Canada Hockey Edition
   ========================================= */

/* ---------- CSS Variables ---------- */
:root {
  --bg: #0a0e1a;
  --card: #111827;
  --card-hover: #1a2234;
  --border: #1e2d42;
  --border-active: #38bdf8;
  --accent: #38bdf8;
  --accent-dim: rgba(56,189,248,0.15);
  --accent-glow: rgba(56,189,248,0.3);
  /* Canada maple red — secondary accent */
  --maple: #dc2626;
  --maple-dim: rgba(220,38,38,0.12);
  --maple-glow: rgba(220,38,38,0.25);
  --text-primary: #f0f6ff;
  --text-secondary: #7a90a8;
  --text-muted: #4a5568;
  --danger: #ef4444;
  --danger-dim: rgba(239,68,68,0.15);
  --success: #22c55e;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.2s ease;
  --font: -apple-system, "Helvetica Neue", Arial, sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  padding-bottom: calc(24px + var(--safe-bottom));
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  top: calc(80px + var(--safe-top));
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: #1e293b;
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  max-width: calc(100vw - 32px);
  white-space: normal;
  text-align: center;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.error { border-color: var(--danger); color: #fca5a5; }
.toast.success { border-color: var(--success); color: #86efac; }

/* ---------- Header ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,14,26,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: calc(12px + var(--safe-top)) 20px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.05em;
  line-height: 1;
  display: flex;
  align-items: center;
  gap: 6px;
}
.logo-icon {
  font-size: 18px;
  line-height: 1;
}
.logo-neo {
  color: var(--accent);
}
.logo-stick {
  color: var(--text-primary);
}

.header-subtitle {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---------- Progress Steps ---------- */
.progress-container {
  padding: 20px 16px 0;
  background: var(--bg);
  position: sticky;
  top: 57px;
  z-index: 90;
}

.progress-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.step-dot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  position: relative;
  cursor: default;
}

.dot-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
}

.dot-label {
  font-size: 10px;
  color: var(--text-muted);
  white-space: nowrap;
  transition: color 0.3s ease;
  letter-spacing: 0.02em;
}

.step-dot.active .dot-num {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}
.step-dot.active .dot-label {
  color: var(--accent);
  font-weight: 600;
}

.step-dot.done .dot-num {
  border-color: var(--success);
  background: rgba(34,197,94,0.15);
  color: var(--success);
}
.step-dot.done .dot-label {
  color: var(--success);
}

.step-line {
  flex: 1;
  height: 2px;
  background: var(--border);
  margin: 0 4px;
  margin-top: -20px;
  transition: background 0.3s ease;
  min-width: 20px;
  max-width: 48px;
}
.step-line.done {
  background: var(--success);
}

/* ---------- Steps Container ---------- */
.steps-container {
  position: relative;
  overflow: hidden;
}

.step-panel {
  display: none;
  padding: 24px 20px;
  animation: slideIn 0.35s ease;
}
.step-panel.active {
  display: block;
}
.step-panel.slide-out-left {
  animation: slideOutLeft 0.3s ease forwards;
}
.step-panel.slide-in-right {
  animation: slideInRight 0.35s ease forwards;
}
.step-panel.slide-out-right {
  animation: slideOutRight 0.3s ease forwards;
}
.step-panel.slide-in-left {
  animation: slideInLeft 0.35s ease forwards;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideOutLeft {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(-40px); }
}
@keyframes slideOutRight {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(40px); }
}

/* ---------- Step Hero ---------- */
.step-hero {
  margin-bottom: 28px;
}

.step-title {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.step-title .accent {
  color: var(--accent);
}

.step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---------- Form Groups ---------- */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.required {
  color: var(--danger);
}
.optional {
  color: var(--text-muted);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  font-size: 12px;
}

.form-input {
  width: 100%;
  min-height: 52px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 16px;
  padding: 14px 16px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
}
.form-input::placeholder {
  color: var(--text-muted);
}
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.form-input.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px var(--danger-dim);
}

.field-error {
  display: none;
  font-size: 12px;
  color: var(--danger);
  margin-top: 6px;
  padding-left: 4px;
}
.field-error.show {
  display: block;
}

/* ---------- Shooting Hand Hint ---------- */
.hand-hint {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--maple-dim);
  border: 1px solid rgba(220,38,38,0.25);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-bottom: 12px;
  font-size: 12px;
  color: #fca5a5;
  line-height: 1.4;
}
.hand-hint-icon {
  font-size: 14px;
  flex-shrink: 0;
}

/* ---------- Chip Scroll (horizontal) ---------- */
.chip-scroll-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin: 0 -20px;
  padding: 4px 20px;
}
.chip-scroll-wrap::-webkit-scrollbar {
  display: none;
}

.chip-scroll {
  display: flex;
  gap: 10px;
  width: max-content;
}

.chip {
  height: 44px;
  padding: 0 20px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 100px;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
  flex-shrink: 0;
}
.chip:active {
  transform: scale(0.95);
}
.chip.selected {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: scale(1.02);
}

/* ---------- Toggle Group (Shooting Hand) ---------- */
.toggle-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.toggle-btn {
  min-height: 80px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-family: var(--font);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all var(--transition);
  padding: 16px;
}
.toggle-btn:active {
  transform: scale(0.97);
}
.toggle-btn.selected {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 16px var(--accent-glow);
  transform: scale(1.02);
}
.toggle-icon {
  font-size: 24px;
  line-height: 1;
}
.toggle-text {
  font-size: 16px;
  font-weight: 700;
}
.toggle-sub {
  font-size: 11px;
  opacity: 0.6;
  letter-spacing: 0.05em;
}

/* ---------- Number Stepper ---------- */
.number-stepper {
  display: flex;
  align-items: center;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 72px;
}

.stepper-btn {
  width: 72px;
  height: 100%;
  background: transparent;
  border: none;
  color: var(--accent);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  flex-shrink: 0;
}
.stepper-btn svg {
  width: 22px;
  height: 22px;
}
.stepper-btn:active {
  background: var(--accent-dim);
}

.stepper-display {
  flex: 1;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 6px;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}

.stepper-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  transition: transform 0.15s ease;
  letter-spacing: -0.01em;
}
.stepper-value.bump {
  transform: scale(1.1);
}
.stepper-unit {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ---------- Chip Grid (2-column) ---------- */
.chip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.chip-grid-item {
  min-height: 48px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  padding: 12px 8px;
  text-align: center;
  transition: all var(--transition);
}
.chip-grid-item:active {
  transform: scale(0.96);
}
.chip-grid-item.selected {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  transform: scale(1.02);
}

/* ---------- Style Cards (Play Style) ---------- */
.style-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.style-card {
  aspect-ratio: 1;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all var(--transition);
  padding: 8px 4px;
}
.style-card:active {
  transform: scale(0.93);
}
.style-card.selected {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: scale(1.05);
}
.style-emoji {
  font-size: 22px;
  line-height: 1;
}
.style-name {
  font-size: 11px;
  font-weight: 700;
  text-align: center;
}

/* ---------- Upload Zone ---------- */
.upload-zone {
  background: var(--card);
  border: 2px dashed var(--border);
  border-radius: var(--radius-xl);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}
.upload-zone:active,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.upload-idle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 32px 24px;
  text-align: center;
}
.upload-icon svg {
  width: 64px;
  height: 64px;
}
.upload-main-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}
.upload-sub-text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.upload-progress-wrap {
  width: 100%;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.upload-filename {
  font-size: 13px;
  color: var(--text-secondary);
  word-break: break-all;
}
.progress-bar-wrap {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #0ea5e9, #38bdf8);
  border-radius: 3px;
  transition: width 0.3s ease;
}
.progress-pct {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  text-align: right;
}

.upload-done-wrap {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.upload-done-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(34,197,94,0.15);
  border: 2px solid var(--success);
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  flex-shrink: 0;
}
.upload-done-info {
  flex: 1;
  min-width: 0;
}
.upload-done-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.upload-done-size {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}
.upload-remove-btn {
  width: 32px;
  height: 32px;
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: 50%;
  color: var(--danger);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}
.upload-remove-btn:active {
  background: rgba(239,68,68,0.25);
}

/* ---------- Skip Button ---------- */
.btn-skip {
  width: 100%;
  min-height: 48px;
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
  transition: all var(--transition);
}
.btn-skip:active {
  background: var(--card);
}

/* ---------- Navigation Buttons ---------- */
.nav-buttons {
  display: flex;
  gap: 12px;
  padding-top: 8px;
}

.btn-primary {
  flex: 1;
  min-height: 54px;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-md);
  color: #0a0e1a;
  font-family: var(--font);
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}
.btn-primary:active {
  transform: scale(0.98);
  background: #7dd3fc;
}
.btn-primary.btn-full {
  width: 100%;
}

.btn-secondary {
  min-height: 54px;
  min-width: 100px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all var(--transition);
  padding: 0 20px;
}
.btn-secondary:active {
  background: var(--card-hover);
  transform: scale(0.98);
}

.btn-outline {
  flex: 1;
  min-height: 48px;
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all var(--transition);
}
.btn-outline:active {
  background: var(--card);
  transform: scale(0.97);
}

/* "Start Over" muted text button */
.btn-text-muted {
  flex: 1;
  min-height: 48px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: color var(--transition);
}
.btn-text-muted:active {
  color: var(--text-secondary);
}

.btn-arrow {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.btn-arrow.flip {
  transform: scaleX(-1);
}

/* ---------- AI Loading ---------- */
.ai-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  gap: 16px;
  padding: 24px;
}

.ai-spinner {
  width: 64px;
  height: 64px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.ai-loading-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}
.ai-loading-sub {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
}

/* ---------- Result Content ---------- */
.result-content {
  padding: 24px 20px;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 100px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.result-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.result-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
  animation: cardIn 0.4s ease both;
}
.result-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0.6;
}
/* Use maple red accent on first card */
.result-card:nth-child(1)::before {
  background: linear-gradient(90deg, var(--maple), transparent);
  opacity: 0.5;
}
.result-card:nth-child(1) { animation-delay: 0.05s; }
.result-card:nth-child(2) { animation-delay: 0.1s; }
.result-card:nth-child(3) { animation-delay: 0.15s; }
.result-card:nth-child(4) { animation-delay: 0.2s; }
.result-card.full-width {
  grid-column: 1 / -1;
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-card-icon {
  font-size: 24px;
  line-height: 1;
}
.result-card-label {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.result-card-value {
  font-size: 22px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.02em;
}
.result-card-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ---------- Report Toggle ---------- */
.report-section {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}

.report-toggle {
  width: 100%;
  min-height: 52px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  transition: background var(--transition);
}
.report-toggle:active {
  background: var(--card-hover);
}
.toggle-chevron {
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}
.report-toggle[aria-expanded="true"] .toggle-chevron {
  transform: rotate(180deg);
}

.report-body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--border);
}

/* Notice line above Chinese report */
.report-notice {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  font-style: italic;
  padding: 12px 0 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}
.report-notice-icon {
  font-size: 14px;
  flex-shrink: 0;
}

.report-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  white-space: pre-wrap;
}

/* ---------- Result Actions ---------- */
.result-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.result-secondary-actions {
  display: flex;
  gap: 12px;
}

/* ---------- Utilities ---------- */
.hidden {
  display: none !important;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

/* ---------- Step 4 full panel ---------- */
#step4 {
  padding: 0;
}
#step4 .ai-loading {
  padding: 40px 20px;
}
/* ── English edition: spec chips, price panel, button effects (synced from CN) ── */
.spec-chips { display:flex; flex-wrap:wrap; gap:8px; }
.spec-chip { padding:8px 16px; border-radius:20px; border:1.5px solid var(--border); background:transparent; color:var(--text-secondary); font-size:13px; font-weight:600; font-family:var(--font); cursor:pointer; transition:all 0.15s; }
.spec-chip.selected { border-color:var(--accent); background:rgba(56,189,248,0.12); color:var(--accent); }
.spec-chip .chip-sub { display:block; font-size:.65rem; font-weight:400; opacity:.75; margin-top:1px; }
.spec-chip .chip-add { display:inline-block; font-size:.65rem; font-weight:600; color:#ef4444; margin-left:4px; }
.addon-chip.selected { background:rgba(239,68,68,.12); border-color:#ef4444; color:#ef4444; }
.manual-apply-btn { width:100%; min-height:48px; background:var(--accent); color:#0a0e1a; border:none; border-radius:var(--radius-md); font-size:15px; font-weight:700; font-family:var(--font); cursor:pointer; margin-top:8px; transition:transform 0.1s cubic-bezier(.36,.07,.19,.97),box-shadow 0.1s ease,opacity 0.1s ease; box-shadow:0 4px 14px rgba(239,68,68,0.35); }
.manual-apply-btn:active { transform:scale(0.96) translateY(2px)!important; box-shadow:0 1px 4px rgba(239,68,68,0.2)!important; opacity:.9!important; }
.manual-apply-btn.btn-pressing { transform:scale(0.94) translateY(3px)!important; box-shadow:0 1px 4px rgba(239,68,68,0.15)!important; opacity:.88!important; }
.btn-spinner { display:inline-block; width:14px; height:14px; border:2px solid rgba(10,14,26,0.4); border-top-color:#0a0e1a; border-radius:50%; animation:btnSpin 0.6s linear infinite; vertical-align:-3px; margin-right:6px; }
@keyframes btnSpin { to { transform:rotate(360deg); } }
.price-panel { margin-top:16px; background:linear-gradient(135deg,rgba(239,68,68,0.08) 0%,rgba(56,189,248,0.06) 100%); border:1.5px solid rgba(239,68,68,0.4); border-radius:var(--radius-md); padding:0; overflow:hidden; animation:priceIn 0.3s ease; }
@keyframes priceIn { from{opacity:0;transform:translateY(8px)} to{opacity:1;transform:translateY(0)} }
.price-total-hero { display:flex; align-items:center; justify-content:space-between; padding:18px 18px 14px; background:rgba(239,68,68,0.06); }
.price-hero-label { font-size:13px; color:var(--text-secondary); font-weight:600; letter-spacing:.5px; }
.price-hero-val { font-size:40px!important; font-weight:900!important; color:var(--accent)!important; letter-spacing:-1.5px; text-shadow:0 0 20px rgba(239,68,68,0.4); animation:pricePop 0.35s cubic-bezier(.36,.07,.19,.97); }
@keyframes pricePop { 0%{transform:scale(.7);opacity:0} 70%{transform:scale(1.08)} 100%{transform:scale(1);opacity:1} }
.price-divider { height:1px; background:rgba(239,68,68,0.2); margin:0 16px; }
.price-items { display:flex; flex-direction:column; gap:4px; padding:12px 18px 8px; }
.price-item-row { display:flex; justify-content:space-between; font-size:13px; color:var(--text-secondary); }
.price-item-row .price-item-name { flex:1; }
.price-item-row .price-item-val { color:var(--text-primary); font-weight:600; white-space:nowrap; margin-left:8px; }
.price-note { font-size:11px; color:var(--text-disabled,#4b5563); text-align:center; padding:8px 16px 12px; border-top:1px solid rgba(255,255,255,0.05); }
.shipping-note { font-size:.8rem; color:#999; padding:6px 4px; margin-top:-4px; }
.final-length-row { display:flex; justify-content:space-between; align-items:center; padding:10px 12px; margin-bottom:8px; background:rgba(56,189,248,.08); border:1px solid rgba(56,189,248,.3); border-radius:10px; }
.final-length-label { font-size:.875rem; color:#94a3b8; }
.final-length-val { font-size:1.05rem; font-weight:700; color:#38bdf8; letter-spacing:.03em; }
.ps-summary { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-bottom:16px; padding:14px 16px; background:rgba(30,41,59,0.6); border-radius:12px; border:1px solid rgba(255,255,255,0.06); }
.ps-summary-item { display:flex; flex-direction:column; gap:2px; }
.ps-summary-label { font-size:11px; color:var(--text-secondary); font-weight:500; letter-spacing:.5px; text-transform:uppercase; }
.ps-summary-value { font-size:14px; font-weight:700; color:var(--text-primary); }
.manual-config-panel { border:1px solid var(--border); border-radius:var(--radius-md); overflow:hidden; margin-top:4px; }
.manual-config-header { display:flex; align-items:center; justify-content:space-between; padding:14px 16px; cursor:pointer; }
.manual-config-title { display:flex; align-items:center; gap:8px; font-size:14px; font-weight:600; color:var(--text-primary); }
.manual-chevron { transition:transform .25s; color:var(--text-secondary); }
.manual-config-body { display:none; padding:0 16px 16px; }
.manual-config-body.open { display:block; }
.spec-section { margin-top:16px; }
.spec-section-label { font-size:12px; font-weight:600; color:var(--text-secondary); letter-spacing:.5px; text-transform:uppercase; margin-bottom:8px; }
.shaft-ext-input-wrap { display:flex; align-items:center; gap:8px; margin-top:6px; }
.shaft-ext-input { width:90px; padding:10px 12px; border:1.5px solid #38bdf8; border-radius:10px; background:rgba(56,189,248,.06); color:#fff; font-size:1rem; font-weight:600; text-align:center; outline:none; }
.shaft-ext-unit { font-size:1.1rem; color:#38bdf8; font-weight:700; }

/* ── Logo (synced from CN) ── */
.logo-wrap { display:flex; flex-direction:column; gap:2px; }
.logo-img { height:36px; width:auto; display:block; object-fit:contain; }