/* ====================================================
   Skills Site — CSS
   Dark cyberpunk theme, matching davidbla.de
   ==================================================== */

/* --- Self-hosted Fonts --- */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/inter-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/inter-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url('../fonts/jetbrains-mono-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url('../fonts/jetbrains-mono-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-tertiary: #1e293b;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --accent: #00ff88;
  --border: #1e293b;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ── LANDING PAGE ── */
.landing {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow-y: auto;
  padding: 2rem;
}
.landing-inner {
  max-width: 680px;
  width: 100%;
  text-align: center;
}
.landing-title {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: .5rem;
}
.landing-sub {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
}

/* Tree cards */
.tree-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
@media (max-width: 540px) {
  .tree-cards { grid-template-columns: 1fr; }
  .landing-title { font-size: 2.2rem; }
}

.tree-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .75rem;
  padding: 2rem 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  text-decoration: none;
  color: var(--text-primary);
  transition: border-color .2s, transform .2s, box-shadow .2s;
  position: relative;
  overflow: hidden;
}
.tree-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,255,136,.08);
}
.tree-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 120%, rgba(0,255,136,.05) 0%, transparent 60%);
  pointer-events: none;
}
.tree-card[data-accent="#ff8800"]:hover { border-color: #ff8800; box-shadow: 0 8px 32px rgba(255,136,0,.08); }
.tree-card[data-accent="#ff8800"]::before { background: radial-gradient(circle at 50% 120%, rgba(255,136,0,.05) 0%, transparent 60%); }

.tree-card-icon {
  font-size: 3rem;
  line-height: 1;
}
.tree-card h2 {
  font-size: 1.3rem;
  font-weight: 700;
}
.tree-card p {
  color: var(--text-secondary);
  font-size: .9rem;
  line-height: 1.5;
}
.tree-card-arrow {
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  font-size: 1.2rem;
  transition: transform .2s;
}
.tree-card[data-accent="#ff8800"] .tree-card-arrow { color: #ff8800; }
.tree-card:hover .tree-card-arrow { transform: translateX(4px); }

.landing-footer {
  margin-top: 3rem;
}
.landing-footer a {
  color: var(--text-muted);
  text-decoration: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: .85rem;
  transition: color .2s;
}
.landing-footer a:hover { color: var(--accent); }

/* ── TREE VIEW ── */
body.tree-view {
  display: flex;
  flex-direction: column;
}

/* Top bar */
.top-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .75rem 1.25rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  z-index: 10;
  flex-shrink: 0;
}
.back-link {
  color: var(--text-muted);
  text-decoration: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: .85rem;
  white-space: nowrap;
  transition: color .2s;
}
.back-link:hover { color: var(--accent); }
.top-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}
.top-sub {
  color: var(--text-secondary);
  font-size: .8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Stats */
.stats-row {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .5rem 1.25rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.stats-label {
  color: var(--text-muted);
  font-size: .75rem;
  font-family: 'JetBrains Mono', monospace;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.stats-track {
  flex: 1;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
}
.stats-fill {
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: 3px;
  transition: width .4s ease;
  position: relative;
}
.stats-fill::after {
  content: attr(data-pct);
  position: absolute;
  right: -2rem;
  top: -4px;
  font-size: .65rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  white-space: nowrap;
}
.stats-nums {
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
  font-size: .8rem;
  min-width: 4rem;
  text-align: right;
}

/* Controls */
.controls-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem 1.25rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#skill-search {
  flex: 1;
  max-width: 260px;
  padding: .4rem .75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: .8rem;
  outline: none;
  transition: border-color .2s;
}
#skill-search:focus { border-color: var(--accent); }
#skill-search::placeholder { color: var(--text-muted); }

.filter-group {
  display: flex;
  gap: .25rem;
}
.filter-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: .35rem .6rem;
  border-radius: 6px;
  font-size: .75rem;
  cursor: pointer;
  transition: all .2s;
  font-family: inherit;
}
.filter-btn:hover { border-color: var(--text-muted); color: var(--text-primary); }
.filter-btn.active {
  background: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
  font-weight: 600;
}

.btn-reset {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
}
.btn-reset:hover { border-color: #ff4466; color: #ff4466; }

/* Legend */
.legend-row {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: .4rem 1.25rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: .3rem;
  font-size: .7rem;
  color: var(--text-muted);
  text-transform: capitalize;
}
.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

/* Canvas */
#hex-canvas {
  flex: 1 1 0;
  width: 100%;
  height: 0;
  min-height: 0;
  display: block;
  cursor: grab;
  touch-action: none;
}

/* ── DETAIL PANEL ── */
.detail-panel {
  position: fixed;
  top: 0;
  right: -420px;
  width: 400px;
  max-width: 90vw;
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  z-index: 100;
  overflow-y: auto;
  padding: 1.5rem;
  transition: right .3s ease;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.detail-panel.open {
  right: 0;
}
.detail-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s;
}
.detail-panel.open ~ .detail-overlay {
  opacity: 1;
  pointer-events: auto;
}

.detail-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  transition: color .2s;
  z-index: 1;
}
.detail-close:hover { color: var(--text-primary); }

.detail-panel h2 {
  font-size: 1.25rem;
  font-weight: 700;
  padding-right: 2rem;
  line-height: 1.4;
}

.detail-desc {
  color: var(--text-secondary);
  font-size: .88rem;
  line-height: 1.6;
}

/* Badges */
.skill-badges {
  display: flex;
  gap: .5rem;
  margin-bottom: .75rem;
}
.skill-cat-badge {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: .15rem .5rem;
  border: 1px solid;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
}
.skill-level-badge {
  font-size: .7rem;
  padding: .15rem .5rem;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
}

/* Prerequisites */
.skill-prereqs {
  margin-top: .75rem;
  font-size: .82rem;
}
.skill-prereqs strong {
  color: var(--text-muted);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.skill-req {
  display: inline-block;
  padding: .15rem .5rem;
  margin: .25rem .25rem 0 0;
  background: var(--bg-tertiary);
  border-radius: 4px;
  font-size: .78rem;
  color: var(--text-secondary);
}
.skill-req.done { color: var(--accent); }

/* Resources */
.detail-section {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}
.detail-section h3 {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-muted);
  margin-bottom: .75rem;
  font-family: 'JetBrains Mono', monospace;
}

.resource-item {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .65rem .75rem;
  background: var(--bg-tertiary);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-primary);
  margin-bottom: .4rem;
  transition: background .2s, border-color .2s;
  border: 1px solid transparent;
}
.resource-item:hover {
  background: rgba(255,255,255,.05);
  border-color: var(--accent);
}
.res-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-top: .1rem;
}
.res-title {
  font-size: .85rem;
  font-weight: 600;
}
.res-source {
  font-size: .72rem;
  color: var(--text-muted);
  margin-top: .1rem;
}
.res-empty {
  color: var(--text-muted);
  font-size: .82rem;
  font-style: italic;
}

/* Tags */
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-top: .6rem;
}
.skill-tag {
  font-size: .68rem;
  padding: .12rem .45rem;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border-radius: 10px;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: .02em;
}

/* Task progress bar */
.task-progress-wrap {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .75rem;
}
.task-progress-bar {
  flex: 1;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
}
.task-progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width .3s ease;
}
.task-progress-label {
  font-size: .75rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-secondary);
  min-width: 2.5rem;
  text-align: right;
}

/* Task optional badge */
.task-optional {
  display: inline-block;
  font-size: .6rem;
  padding: .05rem .35rem;
  margin-left: .4rem;
  background: rgba(255,200,0,.12);
  color: #ffcc00;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  text-transform: uppercase;
  letter-spacing: .03em;
  vertical-align: middle;
}

/* Goal button */
.btn-goal {
  width: 100%;
  padding: .6rem;
  border: 2px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: .85rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: 8px;
  cursor: pointer;
  transition: all .2s;
  margin-bottom: .5rem;
}
.btn-goal:hover {
  border-color: #ffcc00;
  color: #ffcc00;
}
.btn-goal.active {
  border-color: #ffcc00;
  background: rgba(255,200,0,.1);
  color: #ffcc00;
}

/* Language switcher */
.lang-switcher {
  display: flex;
  gap: .3rem;
  align-items: center;
  margin-left: auto;
}
.lang-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 4px;
  color: #94a3b8;
  font-family: 'JetBrains Mono', monospace;
  font-size: .7rem;
  padding: .25rem .45rem;
  cursor: pointer;
  transition: all .15s;
}
.lang-btn:hover { border-color: rgba(255,255,255,.4); color: #e2e8f0; }
.lang-btn.active {
  border-color: var(--accent, #00ff88);
  color: var(--accent, #00ff88);
  background: rgba(0,255,136,.08);
}

/* Sub-skills / tasks */
.sub-skill-item {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .4rem 0;
  cursor: pointer;
  font-size: .85rem;
  color: var(--text-secondary);
  transition: color .2s;
}
.sub-skill-item:hover { color: var(--text-primary); }
.sub-skill-item.done { color: var(--accent); }
.sub-skill-item input[type="checkbox"] {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-radius: 4px;
  background: var(--bg-primary);
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
}
.sub-skill-item input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}
.sub-skill-item input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  color: var(--bg-primary);
  font-size: .7rem;
  font-weight: 700;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Progress button */
.btn-progress {
  width: 100%;
  padding: .75rem;
  border: 2px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: .9rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: 8px;
  cursor: pointer;
  transition: all .2s;
  margin-top: auto;
}
.btn-progress:hover {
  background: var(--accent);
  color: var(--bg-primary);
}
.btn-progress.completed {
  border-color: var(--text-muted);
  color: var(--text-muted);
}
.btn-progress.completed:hover {
  background: var(--text-muted);
  color: var(--bg-primary);
}
.btn-progress.locked {
  border-color: var(--border);
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: .5;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .top-bar { padding: .5rem .75rem; gap: .5rem; }
  .top-title { font-size: .95rem; }
  .top-sub { display: none; }
  .controls-row { padding: .4rem .75rem; flex-wrap: wrap; }
  #skill-search { max-width: 100%; flex-basis: 100%; }
  .filter-group { flex-wrap: wrap; }
  .stats-row { padding: .4rem .75rem; }
  .legend-row { padding: .3rem .75rem; }
  .detail-panel {
    width: 100%;
    max-width: 100vw;
    right: -100vw;
  }
  .detail-panel.open { right: 0; }
}

/* Scrollbar */
.detail-panel::-webkit-scrollbar { width: 6px; }
.detail-panel::-webkit-scrollbar-track { background: transparent; }
.detail-panel::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.detail-panel::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Selection */
::selection { background: var(--accent); color: var(--bg-primary); }