:root {
  --bg: #0a0a0a;
  --surface: #141414;
  --surface2: #1e1e1e;
  --border: #242424;
  --border2: #2e2e2e;
  --text: #f0f0f0;
  --muted: #555;
  --muted2: #888;
  --accent: #e8ff47;
  --heart: #ff4d6d;
}
* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
html, body { background: var(--bg); color: var(--text); font-family: 'Syne', sans-serif; min-height: 100vh; }
body { overflow-x: hidden; }

/* TOAST */
.toast { position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--surface2); border: 1px solid var(--border2); color: var(--text); font-family: 'Space Mono', monospace; font-size: 12px; padding: 10px 18px; border-radius: 999px; opacity: 0; pointer-events: none; transition: all 0.25s; z-index: 9999; white-space: nowrap; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* BACK TO TOP */
#backToTop { position: fixed; bottom: 24px; right: 16px; z-index: 350; width: 36px; height: 36px; background: var(--surface2); border: 1px solid var(--border2); border-radius: 10px; display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity 0.2s, bottom 0.35s; color: var(--muted2); font-size: 16px; }
#backToTop.visible { opacity: 1; pointer-events: auto; }
#backToTop.tray-up { bottom: 170px; }
#backToTop:hover { color: var(--accent); border-color: var(--accent); }

/* INSTALL BANNER */
#installBanner { display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 9999; background: var(--accent); color: #0a0a0a; padding: 16px 20px; gap: 12px; align-items: center; font-family: 'Space Mono', monospace; font-size: 13px; }
#installBanner.show { display: flex; }
#installBanner .bt { flex: 1; }
#installBanner button { background: #0a0a0a; color: var(--accent); border: none; padding: 8px 14px; border-radius: 6px; font-family: 'Space Mono', monospace; font-size: 12px; font-weight: 700; cursor: pointer; }

/* HEADER */
header { position: sticky; top: 0; z-index: 100; background: var(--bg); border-bottom: 1px solid var(--border); padding: 0 12px; }
.header-top { display: flex; align-items: center; height: 52px; gap: 8px; }
.logo { font-family: 'Syne', sans-serif; font-weight: 800; font-size: 20px; letter-spacing: -0.03em; color: var(--text); flex-shrink: 0; }
.logo span { color: var(--accent); }
.search-wrap { flex: 1; min-width: 0; }
#searchInput { width: 100%; background: var(--surface); border: 1px solid var(--border2); border-radius: 8px; padding: 8px 12px; color: var(--text); font-family: 'Syne', sans-serif; font-size: 14px; outline: none; transition: border-color 0.15s; }
#searchInput:focus { border-color: var(--accent); }
#searchInput::placeholder { color: var(--muted); }

/* HEADER BUTTONS */
.header-btn { padding: 7px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; cursor: pointer; border: 1.5px solid var(--border2); background: var(--surface); color: var(--muted2); font-family: 'Syne', sans-serif; white-space: nowrap; flex-shrink: 0; transition: all 0.15s; }
.header-btn:hover { color: var(--text); border-color: var(--muted2); }
.header-btn.active { color: var(--text); border-color: var(--accent); background: var(--surface2); }
.accent-btn { background: var(--accent); color: #0a0a0a !important; border-color: var(--accent) !important; }
.accent-btn:hover { opacity: 0.85; }

/* FILTER DRAWER */
#filterDrawer { background: var(--bg); overflow: hidden; max-height: 0; transition: max-height 0.3s cubic-bezier(0.4,0,0.2,1); border-bottom: 0px solid var(--border); position: sticky; top: 53px; z-index: 99; }
#filterDrawer.open { max-height: 600px; border-bottom: 1px solid var(--border); }
.filter-section { background: var(--bg); }
.filter-label { font-family: 'Space Mono', monospace; font-size: 9px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; padding: 8px 20px 0; }
.filter-row { display: flex; gap: 6px; padding: 8px 16px 10px; flex-wrap: wrap; }
#muscleRow { max-height: 96px; overflow-y: auto; scrollbar-width: none; }
#muscleRow::-webkit-scrollbar { display: none; }
.pill { padding: 5px 14px; border-radius: 999px; font-size: 12px; font-weight: 700; cursor: pointer; border: 1.5px solid var(--border); white-space: nowrap; transition: all 0.15s; background: var(--surface); color: var(--muted2); flex-shrink: 0; }
.pill:hover { color: var(--text); border-color: var(--border2); }
.pill.active { background: var(--accent); color: #0a0a0a; border-color: var(--accent); }
.pill.diff-novice.active { background: #4ade80; border-color: #4ade80; color: #000; }
.pill.diff-beginner.active { background: #a3e635; border-color: #a3e635; color: #000; }
.pill.diff-intermediate.active { background: #facc15; border-color: #facc15; color: #000; }
.pill.diff-advanced.active { background: #fb923c; border-color: #fb923c; color: #000; }
.pill.diff-expert.active { background: #f87171; border-color: #f87171; color: #000; }
.pill.diff-master.active { background: #e879f9; border-color: #e879f9; color: #000; }
.pill.diff-legendary.active { background: #fff; border-color: #fff; color: #000; }
.pill.diff-grand-master.active { background: #fbbf24; border-color: #fbbf24; color: #000; }

/* RESULTS BAR */
.results-bar { display: flex; align-items: center; padding: 8px 16px; border-bottom: 1px solid var(--border); }
.results-count { font-family: 'Space Mono', monospace; font-size: 11px; color: var(--muted); }
.results-count strong { color: var(--accent); }

/* LIST */
#listContainer { padding: 12px 16px 200px; }
.ex-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px; overflow: hidden; }
.ex-card.expanded { border-color: var(--border2); }
.ex-card-main { display: flex; align-items: center; padding: 12px 14px; gap: 12px; cursor: pointer; }
.muscle-bar { width: 3px; height: 38px; border-radius: 2px; flex-shrink: 0; }
.ex-info { flex: 1; min-width: 0; }
.ex-name { font-size: 14px; font-weight: 700; line-height: 1.3; }
.ex-meta { font-family: 'Space Mono', monospace; font-size: 10px; color: var(--muted2); margin-top: 4px; }
.fav-btn { background: none; border: none; color: var(--muted); font-size: 18px; cursor: pointer; padding: 4px; flex-shrink: 0; transition: color 0.15s; }
.fav-btn.active { color: var(--heart); }
.fav-btn:hover { color: var(--heart); }

/* EXPANDED CARD */
.ex-video-wrap { padding: 0 14px 10px; }
.ex-video-link { display: block; background: var(--surface2); border: 1px solid var(--border2); border-radius: 8px; padding: 10px 14px; color: var(--accent); font-family: 'Space Mono', monospace; font-size: 12px; text-decoration: none; }
.ex-video-link:hover { border-color: var(--accent); }
.ex-actions { display: flex; gap: 8px; padding: 0 14px 14px; }
.ex-action-btn { flex: 1; background: var(--surface2); border: 1px solid var(--border2); border-radius: 8px; padding: 9px; color: var(--muted2); font-family: 'Syne', sans-serif; font-size: 12px; font-weight: 700; cursor: pointer; transition: all 0.15s; }
.ex-action-btn:hover { color: var(--text); border-color: var(--accent); }

/* EMPTY / LOADING */
.empty-state, .loading-state { text-align: center; padding: 60px 20px; color: var(--muted2); font-family: 'Space Mono', monospace; font-size: 13px; }

/* SESSION TRAY */
#sessionTray { position: fixed; bottom: 0; left: 0; right: 0; z-index: 300; background: var(--surface); border-top: 1px solid var(--border2); max-height: 180px; overflow-y: auto; transform: translateY(100%); transition: transform 0.3s cubic-bezier(0.4,0,0.2,1); }
#sessionTray.open { transform: translateY(0); }
.tray-header { display: flex; align-items: center; padding: 10px 16px; gap: 8px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--surface); }
.tray-title { font-family: 'Space Mono', monospace; font-size: 11px; color: var(--muted2); flex: 1; }
.tray-copy-btn, .tray-clear-btn { background: var(--surface2); border: 1px solid var(--border2); color: var(--muted2); font-family: 'Space Mono', monospace; font-size: 10px; padding: 4px 10px; border-radius: 6px; cursor: pointer; }
.tray-copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.tray-clear-btn:hover { color: var(--heart); border-color: var(--heart); }
.tray-list { padding: 6px 16px 10px; display: flex; flex-direction: column; gap: 4px; }
.tray-item { display: flex; align-items: center; gap: 8px; }
.tray-item-bar { width: 3px; height: 20px; border-radius: 2px; flex-shrink: 0; }
.tray-item-name { flex: 1; font-size: 13px; }
.tray-remove-btn { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 12px; padding: 2px 6px; }
.tray-remove-btn:hover { color: var(--heart); }

/* VISUAL EXPLORER */
#explorerOverlay { display: none; position: fixed; inset: 0; z-index: 200; background: #080808; flex-direction: column; }
#explorerOverlay.open { display: flex; }
.explorer-header { display: flex; align-items: center; padding: 14px 16px; border-bottom: 1px solid var(--border); gap: 12px; flex-shrink: 0; }
.explorer-back-btn { background: var(--surface); border: 1px solid var(--border2); color: var(--text); font-family: 'Syne', sans-serif; font-size: 13px; font-weight: 700; padding: 7px 14px; border-radius: 8px; cursor: pointer; }
.explorer-back-btn:hover { border-color: var(--accent); color: var(--accent); }
.explorer-title { font-family: 'Space Mono', monospace; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; }
.explorer-canvas { flex: 1; position: relative; overflow: hidden; }
.explorer-lines { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.explorer-line { stroke: #2a2a2a; stroke-width: 2; fill: none; stroke-dasharray: 4 8; }
.explorer-line.regression  { stroke: #3b82f6; opacity: 0.5; }
.explorer-line.progression { stroke: #4ade80; opacity: 0.5; }
.explorer-line.variation   { stroke: #888;    opacity: 0.3; }
.explorer-node { position: absolute; transform: translate(-50%, -50%); cursor: pointer; z-index: 2; }
.center-node { width: 150px; background: #0e0e0e; border: 1.5px solid #383838; border-radius: 14px; padding: 14px 12px; text-align: center; pointer-events: none; }
.cn-accent-bar { height: 3px; border-radius: 2px; margin-bottom: 10px; }
.cn-name { font-family: 'Syne', sans-serif; font-size: 13px; font-weight: 700; color: #f0f0f0; line-height: 1.4; }
.satellite-node .sat-inner { width: 115px; background: #0d0d0d; border: 1px solid #252525; border-radius: 10px; padding: 10px 9px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 4px; transition: border-color 0.2s, box-shadow 0.2s; }
.satellite-node:hover .sat-inner { border-color: var(--accent); box-shadow: 0 0 12px rgba(232,255,71,0.2); }
.sat-regression  .sat-inner,
.sat-inner.sat-regression  { border-left: 2px solid #3b82f666; }
.sat-progression .sat-inner,
.sat-inner.sat-progression { border-left: 2px solid #4ade8066; }
.sat-variation   .sat-inner,
.sat-inner.sat-variation   { border-left: 2px solid #88888866; }
.sat-type-label { font-family: 'Space Mono', monospace; font-size: 8px; text-transform: uppercase; letter-spacing: 0.08em; }
.type-regression  .sat-type-label { color: #3b82f6; }
.type-progression .sat-type-label { color: #4ade80; }
.type-variation   .sat-type-label { color: var(--muted2); }
.sat-name { font-family: 'Syne', sans-serif; font-size: 11px; font-weight: 700; color: #ccc; line-height: 1.35; word-break: break-word; }

#editModeBar { display: none; }