:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-subtle: #f4f4f5;
  --border: #e4e4e7;
  --border-strong: #d4d4d8;
  --text: #111113;
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --accent: #9e3b18;
  --accent-hover: #7f2e11;
  --accent-soft: #fff5f0;
  --ink-btn: #18181b;
  --ink-btn-hover: #27272a;
  --success: #15803d;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-sans: 'Inter', 'Hind Siliguri', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html, body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header / Navigation */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 7px;
  border: 1px solid var(--border);
}

.brand-sub {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 13px;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background 0.15s, color 0.15s;
}

.nav-link:hover {
  color: var(--text);
  background: var(--surface-subtle);
}

.nav-link.active {
  color: var(--text);
  background: var(--surface-subtle);
  font-weight: 600;
}

.auth-bar {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text);
}

.user-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--ink-btn);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--ink-btn-hover);
}

.btn-accent {
  background: var(--accent);
  color: #ffffff;
}

.btn-accent:hover {
  background: var(--accent-hover);
}

.btn-outline {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-outline:hover {
  background: var(--surface-subtle);
}

.btn-google {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.btn-google:hover {
  background: var(--surface-subtle);
}

.btn-sm {
  padding: 6px 11px;
  font-size: 12.5px;
}

.btn-block {
  width: 100%;
}

/* Page Intro */
.page-header {
  padding: 36px 0 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}

.page-header-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.page-title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 6px;
}

.page-subtitle {
  font-size: 14.5px;
  color: var(--text-secondary);
  max-width: 650px;
}

/* Sync Notice Strip */
.sync-strip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.sync-strip-steps {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 13.5px;
  color: var(--text-secondary);
}

.sync-step {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.sync-step-num {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--surface-subtle);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-size: 11px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Section Titles */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.section-title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.section-note {
  font-size: 13px;
  color: var(--text-muted);
}

/* Bundle Pack Row */
.bundle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 14px;
  margin-bottom: 36px;
}

.bundle-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
}

.bundle-card.featured {
  border-color: var(--text);
}

.bundle-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.bundle-tag {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background: var(--surface-subtle);
  padding: 3px 8px;
  border-radius: 4px;
}

.bundle-card.featured .bundle-tag {
  background: var(--text);
  color: #ffffff;
}

.bundle-name {
  font-size: 16px;
  font-weight: 700;
  margin-top: 8px;
}

.bundle-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.bundle-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.price-text {
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Filter Bar */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.filter-tabs {
  display: inline-flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
  flex-wrap: wrap;
}

.filter-tab {
  border: none;
  background: transparent;
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
}

.filter-tab.active {
  background: var(--ink-btn);
  color: #ffffff;
  font-weight: 600;
}

/* Theme Catalog Grid */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}

.theme-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s;
}

.theme-card:hover {
  border-color: var(--text-muted);
}

/* Mini Keyboard Card Visual inside Catalog */
.theme-visual {
  height: 158px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
}

.theme-visual-header {
  height: 36px;
  width: 100%;
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.theme-visual-header-label {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.55);
  color: #ffffff;
}

.theme-visual-status {
  font-size: 10.5px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.65);
  color: #ffffff;
}

.theme-visual-status.unlocked {
  background: var(--success);
}

.theme-visual-body {
  flex: 1;
  background-size: cover;
  background-position: center;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 5px;
  position: relative;
}

.mini-row {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 4px;
}

.mini-key {
  height: 20px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  box-shadow: 0 1px 0 rgba(0,0,0,0.22);
}

.mini-bottom-row {
  display: grid;
  grid-template-columns: 1.3fr 4.4fr 1.5fr;
  gap: 5px;
  align-items: center;
}

.mini-space {
  height: 22px;
  border-radius: 5px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9.5px;
  font-weight: 600;
  overflow: hidden;
}

.theme-card-body {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.theme-card-meta {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.theme-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.theme-card-bn {
  font-size: 12.5px;
  color: var(--text-secondary);
}

.theme-card-price {
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.theme-card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: auto;
}

/* Interactive Live Preview Page (preview.html) */
.preview-workspace {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  margin-bottom: 48px;
  align-items: start;
}

@media (max-width: 880px) {
  .preview-workspace {
    grid-template-columns: 1fr;
  }
}

.preview-sidebar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.preview-sidebar-head {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.preview-theme-list {
  max-height: 540px;
  overflow-y: auto;
  divide-y: 1px solid var(--border);
}

.preview-theme-item {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 11px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  font-family: inherit;
}

.preview-theme-item:hover {
  background: var(--surface-subtle);
}

.preview-theme-item.active {
  background: var(--surface-subtle);
  border-left: 3px solid var(--text);
}

.preview-swatch {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background-size: cover;
  background-position: center;
  flex-shrink: 0;
}

.preview-stage-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
}

.preview-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.typing-editor-box {
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 18px;
}

.typing-editor-label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
}

.typing-textarea {
  width: 100%;
  min-height: 76px;
  border: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 17px;
  color: var(--text);
  resize: vertical;
  outline: none;
}

/* Full Interactive Kobitto Keyboard Simulator */
.live-keyboard-frame {
  max-width: 480px;
  margin: 0 auto;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  user-select: none;
}

.live-kb-header {
  height: 46px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.live-kb-suggestions {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  justify-content: space-around;
}

.live-kb-sug-chip {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  background: rgba(0, 0, 0, 0.35);
  color: #ffffff;
  backdrop-filter: blur(2px);
}

.live-kb-body {
  background-size: cover;
  background-position: center;
  padding: 10px 7px 12px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.live-kb-row {
  display: flex;
  justify-content: center;
  gap: 5px;
}

.live-key {
  flex: 1;
  height: 44px;
  border-radius: 7px;
  border: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  position: relative;
  transition: transform 0.06s ease, filter 0.06s ease;
}

.live-key:active, .live-key.pressed {
  transform: translateY(1px) scale(0.97);
  filter: brightness(1.15);
}

.live-key-hint {
  position: absolute;
  top: 3px;
  right: 5px;
  font-size: 9px;
  opacity: 0.72;
  font-weight: 500;
}

.live-key.wide {
  flex: 1.45;
  font-size: 13px;
}

.live-key.space {
  flex: 4.5;
  background-size: cover;
  background-position: center;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  overflow: hidden;
}

.no-key-borders .live-key:not(.space):not(.enter-key) {
  background: transparent !important;
  box-shadow: none !important;
}

/* Single-Page Checkout & Account Layouts */
.two-col-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  margin-bottom: 48px;
  align-items: start;
}

@media (max-width: 820px) {
  .two-col-layout {
    grid-template-columns: 1fr;
  }
}

.panel-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
}

.panel-title {
  font-size: 16.5px;
  font-weight: 700;
  margin-bottom: 6px;
}

.panel-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.form-group {
  margin-bottom: 15px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.form-input, .form-select {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--text);
}

.payment-methods-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.pm-option {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 10px;
  text-align: center;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
}

.pm-option.active {
  border-color: var(--text);
  background: var(--surface-subtle);
}

.status-banner {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  margin-top: 14px;
  border: 1px solid var(--border);
}

.status-banner.success {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
}

.status-banner.error {
  background: var(--danger-bg);
  border-color: #fecaca;
  color: var(--danger);
}

.code-pill {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 5px;
  display: inline-block;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}