* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  padding: clamp(1.25rem, 4vw, 3.5rem) clamp(1rem, 5vw, 3rem) 4rem;
}

.page {
  max-width: 1180px;
  margin: 0 auto;
}

header.hero {
  text-align: center;
  max-width: 680px;
  margin: 0 auto clamp(2rem, 5vw, 3.5rem);
}

.eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

h1 {
  font-size: clamp(1.9rem, 3.4vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
}

.hero p {
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

.hero-link {
  display: inline-block;
  margin-top: 1.1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.hero-link:hover {
  border-bottom-color: var(--accent);
}

/* ---------- Model Selector & Catalog Bar ---------- */
.keyboard-selector-bar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-card);
  flex-wrap: wrap;
}

.selector-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.selector-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.keyboard-select {
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.85rem;
  cursor: pointer;
}

.keyboard-select:focus {
  outline: none;
  border-color: var(--accent);
}

.changelog-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.changelog-link-btn:hover {
  background: var(--surface);
  border-color: var(--accent);
  color: var(--accent);
}

.changelog-icon {
  font-size: 0.95rem;
  line-height: 1;
}

.download-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid transparent;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.download-link:hover {
  opacity: 0.95;
  border-color: var(--accent);
}

.theme-toggle {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-card);
  transition: background 0.15s ease, transform 0.1s ease;
}

.theme-toggle:hover {
  background: var(--key-cover-inert);
}

.theme-toggle:active {
  transform: scale(0.96);
}

.layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(1.25rem, 2.5vw, 2.5rem);
  align-items: start;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
  .mobile-picker {
    display: block !important;
  }
}

@media (max-width: 640px) {
  body {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
  }
  .stage-card {
    padding: 0.85rem;
  }
  .key-hold,
  .key-shift {
    display: none;
  }
  .theme-toggle {
    top: 0.75rem;
    right: 0.75rem;
    padding: 0.45rem 0.7rem;
    font-size: 0.72rem;
  }
  .theme-toggle .label {
    display: none;
  }
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: sticky;
  top: 1.5rem;
  background: var(--key-cover-inert);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
}

.sidebar-group + .sidebar-group {
  margin-top: 0.4rem;
}

.sidebar-group-label {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--sidebar-label);
  padding: 0.6rem 0.65rem 0.3rem;
}

.layer-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text);
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 500;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.layer-btn:hover {
  background: var(--key-cover-inert);
}

.layer-btn .num {
  font-variant-numeric: tabular-nums;
  font-size: 0.68rem;
  color: var(--text-faint);
  width: 1.3em;
}

.layer-btn.active {
  background: var(--accent);
  color: var(--accent-contrast);
}

.layer-btn.active .num {
  color: var(--accent-contrast);
  opacity: 0.7;
}

/* ---------- Mobile picker ---------- */
.mobile-picker {
  display: none;
  margin-bottom: 1rem;
}

.mobile-picker select {
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  box-shadow: var(--shadow-card);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236e6e73'><path d='M5.5 7.5l4.5 4.5 4.5-4.5z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1rem;
}

/* ---------- Colorway picker ---------- */
.colorway-picker {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.55rem 1rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  width: fit-content;
}

.colorway-picker-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0;
}

.colorway-swatch {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--colorway-swatch-color, #3b3b3d);
  border: 1px solid rgba(0, 0, 0, 0.15);
  flex: none;
}

.colorway-label {
  font-size: 1.05rem;
  font-weight: 600;
  white-space: nowrap;
  min-width: 6.5rem;
}

#colorway-slider {
  width: 80px;
  accent-color: var(--accent);
  cursor: pointer;
  display: block;
}

/* ---------- Main Stage ---------- */
.stage-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: clamp(1rem, 3vw, 2rem);
  box-shadow: var(--shadow-card);
}

.stage-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.1rem;
}

.stage-head h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

.platform-tag {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
}

.switch-indicator {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 0.6rem;
}

.switch-indicator-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--tertiary-text);
  background: var(--tertiary-soft);
  border-radius: var(--radius-sm);
  padding: 0.28rem 0.65rem;
}

.switch-indicator-arrow {
  font-size: 0.95rem;
  line-height: 1;
}

.board-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 388/173;
  margin: 0 auto;
}

.board-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* ---------- Redesigned Info Panel ---------- */
.info-panel {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 1.25rem;
  align-items: start;
  margin-top: 1.25rem;
  padding: 1.1rem 1.25rem;
  background: var(--key-cover-inert);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

@media (max-width: 680px) {
  .info-panel {
    grid-template-columns: 1fr;
  }
}

.info-preview-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
}

.info-key-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
}

.info-key {
  font-family: inherit;
  font-style: normal;
  font-size: 1.25rem;
  font-weight: 700;
  width: 58px;
  height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.12);
  padding: 0.25rem;
  line-height: 1.2;
}

.info-pos-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  text-align: center;
}

.info-details-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-width: 0;
}

.info-head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.45rem;
}

.info-title-group {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.info-action-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.info-context-pill {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  padding: 0.18rem 0.5rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.6rem;
}

.info-cell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.info-cell-full {
  grid-column: 1 / -1;
}

.info-cell-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
}

.info-cell-val {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
  word-break: break-word;
}

.info-chip {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.info-chip.hold {
  background: var(--secondary-soft);
  color: var(--secondary-text);
}

.info-chip.shift {
  background: var(--tertiary-soft);
  color: var(--tertiary-text);
}

.credit {
  text-align: center;
  margin-top: 2.5rem;
  font-size: 0.78rem;
  color: var(--text-faint);
}

.credit a {
  color: inherit;
}

/* ---------- Coming Soon State ---------- */
.sidebar-coming-soon {
  padding: 0.75rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  text-align: center;
}

.coming-soon-stage {
  padding: 3rem 1.5rem;
  text-align: center;
}

.coming-soon-card {
  max-width: 480px;
  margin: 0 auto;
  padding: 2.25rem 1.5rem;
  background: var(--surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
}

.coming-soon-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.65rem;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.coming-soon-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.coming-soon-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

/* ---------- Changelog Modal Overlay ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.modal-backdrop.open {
  display: flex;
}

.modal-card {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.28);
  width: 100%;
  max-width: 660px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  animation: modalFadeIn 0.15s ease-out;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.97);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.15rem 1.4rem;
  border-bottom: 1px solid var(--border);
}

.modal-title-group {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.modal-badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.5rem;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: var(--radius-sm);
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
  color: var(--text);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.1rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease, background 0.15s ease;
}

.modal-close:hover {
  color: var(--text);
  background: var(--bg);
}

.modal-body {
  padding: 1.4rem;
  overflow-y: auto;
  flex: 1 1 auto;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
}

.modal-body h4 {
  margin-top: 0;
  margin-bottom: 0.6rem;
  font-size: 1.05rem;
  color: var(--text);
}

.modal-body ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.modal-body li {
  margin-bottom: 0.45rem;
}

.modal-body strong {
  color: var(--text);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.4rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
  border-bottom-left-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.modal-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.modal-btn-close {
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.95rem;
  cursor: pointer;
  transition: background 0.15s ease;
}

.modal-btn-close:hover {
  background: var(--key-cover-inert);
}