/* ── Reset & base ──────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #040714;
  --surface-1: rgba(255,255,255,.03);
  --surface-2: rgba(255,255,255,.06);
  --border-subtle: rgba(255,255,255,.07);
  --border: rgba(255,255,255,.1);
  --border-strong: rgba(255,255,255,.22);
  --text-primary: #f9f9f9;
  --text-secondary: #cacaca;
  --text-muted: rgba(255,255,255,.55);
  --accent: #60a5fa;
  --accent-dim: rgba(96,165,250,.15);
  --accent-glow: rgba(96,165,250,.25);
  --cat-setup: #22d3ee;
  --cat-skills: #a78bfa;
  --cat-commands: #fb923c;
  --cat-context: #34d399;
  --cat-diagrams: #38bdf8;
  --cat-tips: #c9a035;
  --cat-mcps: rgba(255,255,255,.35);
  --font: 'Avenir Next', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'JetBrains Mono', Consolas, monospace;
  --text-xs: 0.75rem; --text-sm: 0.875rem; --text-base: 1rem;
  --text-lg: 1.125rem; --text-xl: 1.25rem; --text-2xl: 1.5rem;
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-6: 24px; --space-8: 32px;
  --radius-sm: 6px; --radius: 10px; --radius-lg: 15px;
  --ease-snap: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 120ms; --dur: 200ms;
}

body {
  font-family: var(--font);
  background: var(--bg);
  min-height: 100vh;
  color: var(--text-primary);
  display: flex; flex-direction: column;
}

/* ── Header ────────────────────────────────────────────────── */
.header-bar {
  background: linear-gradient(135deg, #B015B0 0%, #3D0080 45%, #080010 100%);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 var(--space-6);
  height: 68px;
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  align-items: center;
}

.header-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.header-logo-img {
  height: 36px; width: auto; flex-shrink: 0;
  filter: brightness(0) invert(1);
  transition: transform 0.3s var(--ease-snap);
  display: block;
}
.header-logo-img:hover { transform: scale(1.14) rotate(-9deg); }

.header-logo h1 { font-size: 1.2em; font-weight: 600; color: var(--text-primary); letter-spacing: .5px; }
.header-subtitle { font-size: .82em; color: rgba(255,255,255,.72); font-weight: 500; margin-top: 3px; }

/* ── Header nav tabs ──────────────────────────────────────── */
.header-nav {
  margin-left: auto;
  display: flex;
  gap: var(--space-1);
}

.nav-tab {
  padding: 6px 16px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,.6);
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--dur);
}
.nav-tab:hover {
  color: rgba(255,255,255,.85);
  background: rgba(255,255,255,.06);
}
.nav-tab.active {
  color: #fff;
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.15);
}

.header-home {
  display: flex; align-items: center;
  margin-left: 5px;
  padding: 5px;
  color: rgba(255,255,255,0.9); text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--dur), background var(--dur); flex-shrink: 0;
}
.header-home:hover { color: #fff; background: rgba(255,255,255,0.12); }
.header-home svg { width: 34px; height: 34px; display: block; }

/* ── Layout ────────────────────────────────────────────────── */
.container {
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 30px;
  flex: 1;
}

/* ── Motto ─────────────────────────────────────────────────── */
.motto {
  text-align: center;
  margin-bottom: var(--space-6);
  color: var(--text-muted);
  font-size: var(--text-sm);
  letter-spacing: 0.3px;
}
.motto strong {
  color: var(--accent);
  font-weight: 600;
}

/* ── Search bar ────────────────────────────────────────────── */
.search-bar {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.search-wrap {
  flex: 1;
  position: relative;
}

.search-wrap svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px; height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 12px 14px 12px 42px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: var(--text-base);
  outline: none;
  transition: border-color var(--dur), box-shadow var(--dur);
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.clear-btn {
  padding: 0 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background var(--dur), border-color var(--dur);
  white-space: nowrap;
}
.clear-btn:hover {
  background: rgba(255,255,255,.08);
  border-color: var(--border-strong);
}

/* ── Filter row ────────────────────────────────────────────── */
.filter-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.result-count {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-left: auto;
  white-space: nowrap;
}

/* ── Dropdown ─────────────────────────────────────────────── */
.dropdown { position: relative; }

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 12px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: border-color var(--dur), background var(--dur);
  white-space: nowrap;
  min-width: 140px;
}
.dropdown-toggle:hover { background: var(--surface-2); border-color: var(--border-strong); }
.dropdown.open .dropdown-toggle { border-color: var(--accent); background: var(--surface-2); }

.dropdown-label { font-size: var(--text-xs); color: var(--text-muted); margin-right: var(--space-1); }
.dropdown-value { flex: 1; text-align: left; overflow: hidden; text-overflow: ellipsis; }

.dropdown-arrow { width: 14px; height: 14px; flex-shrink: 0; color: var(--text-muted); transition: transform var(--dur); }
.dropdown.open .dropdown-arrow { transform: rotate(180deg); }

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 100%;
  max-height: 300px;
  overflow-y: auto;
  background: #0d0f1a;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-1) 0;
  list-style: none;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0,0,0,.5);
  scrollbar-color: rgba(255,255,255,.15) transparent;
  scrollbar-width: thin;
}
.dropdown.open .dropdown-menu { display: block; }

.dropdown-menu::-webkit-scrollbar { width: 6px; }
.dropdown-menu::-webkit-scrollbar-track { background: transparent; }
.dropdown-menu::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 3px; }

.dropdown-item {
  display: flex; align-items: center; gap: var(--space-2);
  padding: 8px 14px;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast);
  white-space: nowrap;
}
.dropdown-item:hover { background: rgba(255,255,255,.06); color: var(--text-primary); }
.dropdown-item.selected { color: var(--accent); font-weight: 500; }

/* ── View panels ───────────────────────────────────────────── */
.view-panel { display: none; }
.view-panel.active { display: block; }

/* ── Level sections ────────────────────────────────────────── */
.level-section {
  margin-bottom: 48px;
}

.level-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255,255,255,.02) 0%, transparent 100%);
  border: 1px solid var(--border-subtle);
}

.level-number {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: var(--text-xl);
  font-weight: 700;
  flex-shrink: 0;
}

.level-section[data-level="beginner"] .level-number {
  background: rgba(74,222,128,.12);
  color: #4ade80;
  border: 1.5px solid rgba(74,222,128,.3);
}
.level-section[data-level="intermediate"] .level-number {
  background: rgba(201,160,53,.12);
  color: #c9a035;
  border: 1.5px solid rgba(201,160,53,.3);
}
.level-section[data-level="advanced"] .level-number {
  background: rgba(248,113,113,.12);
  color: #f87171;
  border: 1.5px solid rgba(248,113,113,.3);
}

.level-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
}

.level-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: 2px;
  line-height: 1.4;
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

/* ── Tutorial card ─────────────────────────────────────────── */
.tutorial-card {
  background: linear-gradient(135deg, rgba(255,255,255,.025) 0%, rgba(255,255,255,.01) 100%);
  border: 1px solid var(--border);
  border-left: 3px solid var(--card-cat, var(--accent));
  border-radius: var(--radius);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  animation: fadeIn 0.3s ease-out both;
  transition: transform var(--dur) ease-out, box-shadow var(--dur) ease-out, border-color var(--dur);
  cursor: pointer;
}
.tutorial-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25), 0 0 0 1px var(--card-cat, var(--accent));
  border-color: rgba(255,255,255,.15);
}

.tutorial-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.tutorial-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

.tutorial-desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-3);
  line-height: 1.5;
  flex-shrink: 0;
}

/* ── Badges ────────────────────────────────────────────────── */
.tutorial-badges, .path-step-badges {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: auto;
}

.badge {
  font-size: var(--text-xs);
  padding: 2px 10px;
  border-radius: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.badge-category {
  color: var(--text-secondary);
  background: var(--surface-2);
}

.badge-tool {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid;
}

.badge-tool.claude {
  color: #d4956a;
  border-color: rgba(204,120,92,.35);
  background: rgba(204,120,92,.1);
}

.badge-tool.cursor {
  color: #4ade80;
  border-color: rgba(74,222,128,.3);
  background: rgba(74,222,128,.08);
}

.badge-difficulty {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.badge-difficulty.beginner { color: #4ade80; border-color: rgba(74,222,128,.25); }
.badge-difficulty.intermediate { color: #c9a035; border-color: rgba(201,160,53,.25); }
.badge-difficulty.advanced { color: #f87171; border-color: rgba(248,113,113,.25); }

/* ── Category accent colors ────────────────────────────────── */
.tutorial-card[data-cat="setup"]    { --card-cat: var(--cat-setup); }
.tutorial-card[data-cat="skills"]   { --card-cat: var(--cat-skills); }
.tutorial-card[data-cat="commands"] { --card-cat: var(--cat-commands); }
.tutorial-card[data-cat="context"]  { --card-cat: var(--cat-context); }
.tutorial-card[data-cat="diagrams"] { --card-cat: var(--cat-diagrams); }
.tutorial-card[data-cat="tips"]     { --card-cat: var(--cat-tips); }
.tutorial-card[data-cat="mcps"]     { --card-cat: var(--cat-mcps); }

.tutorial-card[data-cat="mcps"] {
  opacity: 0.6;
  transition: opacity var(--dur), transform var(--dur) ease-out, box-shadow var(--dur) ease-out;
}
.tutorial-card[data-cat="mcps"]:hover { opacity: 0.85; }

/* ── Modal overlay ─────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(6px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 48px var(--space-6);
  overflow-y: auto;
}
.modal-overlay.open { display: flex; }

.modal-panel {
  background: linear-gradient(180deg, #0d1020 0%, #080b16 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  width: 100%;
  max-width: 780px;
  animation: modalIn 0.2s ease-out;
  position: relative;
  box-shadow: 0 24px 64px rgba(0,0,0,.5);
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.modal-badges {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.modal-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.modal-share-btn, .modal-close-btn {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 6px 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--dur);
}
.modal-share-btn svg, .modal-close-btn svg { width: 16px; height: 16px; }
.modal-share-btn:hover, .modal-close-btn:hover {
  background: rgba(255,255,255,.08);
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.modal-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.modal-desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.5;
}

.modal-body {
  font-size: 0.938rem;
  color: #dcdcdc;
  line-height: 1.75;
}

.modal-body h2 {
  font-size: var(--text-xl);
  color: var(--text-primary);
  margin: 36px 0 var(--space-4) 0;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  letter-spacing: 0.2px;
}
.modal-body h2:first-child { margin-top: 0; }

.modal-body h3 {
  font-size: var(--text-base);
  color: #e8e8e8;
  margin: var(--space-6) 0 var(--space-3) 0;
  font-weight: 600;
}

.modal-body p { margin-bottom: var(--space-4); }

.modal-body ul,
.modal-body ol { margin: 0 0 var(--space-4) var(--space-6); }

.modal-body li {
  margin-bottom: var(--space-2);
  line-height: 1.65;
}
.modal-body li::marker { color: var(--text-muted); }

.modal-body a { color: var(--accent); text-decoration: underline; text-decoration-color: rgba(96,165,250,.35); text-underline-offset: 2px; }
.modal-body a:hover { text-decoration-color: var(--accent); }

.modal-body code {
  font-family: var(--mono);
  font-size: 0.84em;
  background: rgba(255,255,255,.08);
  padding: 2px 7px;
  border-radius: 5px;
  border: 1px solid rgba(255,255,255,.06);
  color: #ecd8c4;
}

.modal-body strong { color: var(--text-primary); font-weight: 600; }

.modal-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--space-4) 0;
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}
.modal-body th, .modal-body td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
}
.modal-body tr:last-child td { border-bottom: none; }
.modal-body th {
  background: rgba(255,255,255,.05);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}
.modal-body td { color: #d0d0d0; }
.modal-body tr:hover td { background: rgba(255,255,255,.02); }

/* ── Code blocks ───────────────────────────────────────────── */
.code-block-wrap {
  position: relative;
  margin: var(--space-4) 0;
}

.code-block {
  background: rgba(0,0,0,.55);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 50px 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: #e2e8f0;
  white-space: pre-wrap;
  word-break: break-word;
}

.code-block::-webkit-scrollbar { width: 6px; height: 6px; }
.code-block::-webkit-scrollbar-track { background: transparent; }
.code-block::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 3px; }
.code-block { scrollbar-color: rgba(255,255,255,.15) transparent; scrollbar-width: thin; }

.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--dur);
}
.code-copy-btn svg { width: 16px; height: 16px; }
.code-copy-btn:hover { color: var(--accent); background: var(--accent-dim); border-color: var(--accent); }
.code-copy-btn.copied { color: #4ade80; border-color: #4ade80; }

/* ── Learning path ─────────────────────────────────────────── */
.path-intro {
  text-align: center;
  margin-bottom: 40px;
}

.path-heading {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.path-desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.5;
}

/* ── Overall progress ─────────────────────────────────────── */
.path-overall {
  max-width: 320px;
  margin: var(--space-4) auto 0;
}

.path-overall-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  display: block;
  text-align: center;
  margin-bottom: var(--space-1);
}

.path-progress-bar {
  height: 4px;
  background: var(--surface-2);
  border-radius: 2px;
  overflow: hidden;
}

.path-progress-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.4s ease-out;
}
.path-progress-fill--overall {
  background: linear-gradient(90deg, #d4956a, var(--accent), #4ade80);
}

/* ── Column headers ───────────────────────────────────────── */
.path-col-headers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  max-width: 900px;
  margin: 0 auto var(--space-4);
}

.path-col-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.3px;
}
.path-col-label svg { width: 18px; height: 18px; }

.path-col-label--claude {
  background: rgba(204,120,92,.08);
  border: 1px solid rgba(204,120,92,.25);
  color: #d4956a;
}
.path-col-label--cursor {
  background: rgba(74,222,128,.06);
  border: 1px solid rgba(74,222,128,.2);
  color: #4ade80;
}

/* ── Path grid ────────────────────────────────────────────── */
.path-grid {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* ── Shared rows (full-width, soft amber accent) ─────────── */
.path-row--shared {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid rgba(201,160,53,.15);
  border-left: 2px solid rgba(201,160,53,.35);
  border-radius: var(--radius);
  background: rgba(201,160,53,.03);
  transition: all var(--dur);
}
.path-row--shared:hover {
  border-color: rgba(201,160,53,.25);
  border-left-color: rgba(201,160,53,.5);
  background: rgba(201,160,53,.06);
}

.path-row--shared .path-check { color: rgba(201,160,53,.45); }
.path-row--shared .path-check:hover { color: rgba(201,160,53,.85); background: rgba(201,160,53,.08); }

.path-row--done { opacity: 0.4; }
.path-row--done:hover { opacity: 0.7; }
.path-row--done .path-check { color: #4ade80 !important; }

/* ── Pair rows (side by side) ─────────────────────────────── */
.path-row--pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.path-cell {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  transition: all var(--dur);
}

.path-cell--empty {
  min-height: 0;
}

.path-cell--claude {
  border-left: 2px solid rgba(204,120,92,.35);
  background: rgba(204,120,92,.03);
}
.path-cell--claude:hover { background: rgba(204,120,92,.06); }

.path-cell--cursor {
  border-left: 2px solid rgba(74,222,128,.3);
  background: rgba(74,222,128,.02);
}
.path-cell--cursor:hover { background: rgba(74,222,128,.05); }

.path-cell--done { opacity: 0.45; }
.path-cell--done:hover { opacity: 0.75; }

/* ── Shared check / step elements ─────────────────────────── */
.path-check {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  border-radius: 50%;
  transition: all var(--dur);
  padding: 0;
  margin-top: 1px;
}
.path-check svg { width: 20px; height: 20px; }
.path-check:hover { color: var(--accent); background: var(--accent-dim); }

.path-cell--done .path-check,
.path-row--done .path-check { color: #4ade80; }

.path-cell--done .path-check:hover,
.path-row--done .path-check:hover { color: #f87171; background: rgba(248,113,113,.1); }

.path-step-body {
  flex: 1;
  min-width: 0;
  cursor: pointer;
  transition: all var(--dur);
}
.path-step-body:hover { transform: translateX(2px); }

.path-step-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1px;
}

.path-step-why {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.4;
}

/* ── Empty state ───────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.empty-state .btn-secondary { margin-top: var(--space-4); }

.btn-secondary {
  padding: 8px 20px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--dur);
}
.btn-secondary:hover { background: rgba(255,255,255,.08); }

/* ── Keyboard hint ─────────────────────────────────────────── */
.kbd {
  display: inline-block;
  padding: 1px 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  vertical-align: middle;
  margin-left: 6px;
}

/* ── Entrance animation ───────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Button press feedback ────────────────────────────────────── */
.code-copy-btn:active,
.dropdown-toggle:active,
.clear-btn:active,
.btn-secondary:active,
.modal-share-btn:active,
.modal-close-btn:active,
.nav-tab:active { transform: scale(0.97); transition-duration: var(--dur-fast); }

/* ── Toast ─────────────────────────────────────────────────── */
.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  background: #1a1730; border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px; padding: 10px 16px;
  font-size: 0.84rem; color: var(--text-primary);
  box-shadow: 0 4px 20px rgba(0,0,0,0.55);
  pointer-events: none;
  transform: translateY(8px); opacity: 0;
  transition: opacity 0.18s, transform 0.18s;
}
.toast.visible { opacity: 1; transform: translateY(0); }

/* ── Footer ────────────────────────────────────────────────── */
.info-footer {
  text-align: center; padding: 20px var(--space-6) 28px;
  color: var(--text-muted); font-size: .78em; line-height: 1.8;
  border-top: 1px solid var(--border-subtle);
  margin-top: 48px;
}
.footer-link { color: var(--text-muted); text-decoration: none; transition: color var(--dur); }
.footer-link:hover, .footer-link:focus-visible { color: var(--text-secondary); text-decoration: underline; }

/* ── Focus styles ──────────────────────────────────────────── */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Skip link ─────────────────────────────────────────────── */
.skip-link {
  position: absolute; top: -100%; left: var(--space-4); z-index: 1000;
  padding: var(--space-2) var(--space-4);
  background: var(--accent); color: #000; font-weight: 600; font-size: var(--text-sm);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm); text-decoration: none; transition: top var(--dur);
}
.skip-link:focus { top: 0; }

/* ── Reduced motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .level-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
  .level-grid { grid-template-columns: 1fr; }
  .header-bar { padding: 0 var(--space-4); }
  .container { padding: var(--space-4); }
  .filter-row { gap: var(--space-2); }
  .dropdown { flex: 1; min-width: 0; }
  .dropdown-toggle { min-width: 0; width: 100%; }
  .dropdown-menu { min-width: 180px; }
  .result-count { width: 100%; text-align: center; margin-left: 0; }
  .tutorial-header { flex-direction: column; gap: var(--space-1); }
  .code-block { font-size: 0.75rem; padding: 12px 44px 12px 12px; }

  .modal-overlay { padding: 24px var(--space-3); }
  .modal-panel { padding: var(--space-6); }
  .modal-header { flex-direction: column; gap: var(--space-3); align-items: flex-start; }
  .modal-actions { align-self: flex-end; }
  .modal-body { font-size: var(--text-sm); }
  .modal-body h2 { margin-top: var(--space-6); }
  .modal-body table { display: block; overflow-x: auto; }

  .header-nav { gap: 0; }
  .nav-tab { padding: 6px 10px; font-size: var(--text-xs); }

  .level-header { gap: var(--space-3); }
  .level-number { width: 36px; height: 36px; font-size: var(--text-lg); }

  .path-col-headers { gap: var(--space-2); }
  .path-row--pair { grid-template-columns: 1fr; gap: var(--space-1); }
  .path-cell { padding: var(--space-2) var(--space-3); }
  .path-row--shared { padding: var(--space-2) var(--space-3); }
  .path-cell--claude { border-left-width: 3px; }
  .path-cell--cursor { border-left-width: 3px; }
}