/* ═══════════════════════════════════════════════
   WELLS EXPLORER — Log Viewer
   logviewer.css
═══════════════════════════════════════════════ */

:root {
  --bg-main:       #0f172a;
  --bg-sidebar:    #1e293b;
  --bg-card:       #1e293b;
  --bg-panel:      #162032;
  --text-main:     #f8fafc;
  --text-muted:    #94a3b8;
  --accent:        #0ea5e9;
  --accent-hover:  #38bdf8;
  --border:        #334155;
  --border-light:  #253347;
  --font:          'Inter', sans-serif;

  /* Track colours */
  --track-header-bg: #162032;
  --track-bg:        #0f172a;
  --grid-major:      rgba(51,65,85,0.7);
  --grid-minor:      rgba(51,65,85,0.3);
  --depth-bg:        #111827;

  /* Formation band palette */
  --f0: #f59e0b; --f1: #10b981; --f2: #8b5cf6;
  --f3: #ef4444; --f4: #06b6d4; --f5: #f97316;
  --f6: #84cc16; --f7: #ec4899; --f8: #a78bfa;
  --f9: #34d399;
}

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

html, body {
  height: 100%;
  background: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font);
  overflow: hidden;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ════════════════════════════════
   TOP NAV BAR
════════════════════════════════ */
#topbar {
  height: 56px;
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  flex-shrink: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

#topbar .back-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(14,165,233,0.08);
  border: 1px solid rgba(14,165,233,0.3);
  color: var(--accent-hover);
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 7px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  text-decoration: none;
  white-space: nowrap;
}
#topbar .back-btn:hover {
  background: rgba(14,165,233,0.18);
  border-color: var(--accent-hover);
}

#topbar .well-title {
  flex: 1;
  min-width: 0;
}
#topbar .well-title h1 {
  font-size: 1rem;
  font-weight: 700;
  background: linear-gradient(90deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#topbar .well-title .uwi-badge {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 2px;
}

#topbar .controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.ctrl-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.ctrl-select {
  background: var(--bg-main);
  color: var(--text-main);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font-family: var(--font);
  font-size: 0.8rem;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
}
.ctrl-select:hover, .ctrl-select:focus { border-color: var(--accent); }
.ctrl-select option { background: var(--bg-sidebar); }

.ctrl-btn {
  background: rgba(14,165,233,0.08);
  border: 1px solid rgba(14,165,233,0.3);
  color: var(--accent-hover);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 7px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.ctrl-btn:hover {
  background: rgba(14,165,233,0.18);
  border-color: var(--accent-hover);
}
.ctrl-btn.active {
  background: rgba(14,165,233,0.25);
  border-color: var(--accent-hover);
  color: #fff;
}

.separator {
  width: 1px;
  height: 28px;
  background: var(--border);
  flex-shrink: 0;
}

/* ════════════════════════════════
   BODY LAYOUT
════════════════════════════════ */
#lv-body {
  display: flex;
  height: calc(100vh - 56px);
  overflow: hidden;
}

/* ── Left legend panel ── */
#legend-panel {
  width: 220px;
  flex-shrink: 0;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width 0.25s ease;
}
#legend-panel.collapsed { width: 0; overflow: hidden; }

#legend-panel .panel-header {
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-hover);
  flex-shrink: 0;
}

#legend-panel .panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.legend-section-title {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  margin-bottom: 8px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--border-light);
}

/* Formation legend items */
.formation-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 0.78rem;
  color: var(--text-main);
}
.formation-legend-item .swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
  opacity: 0.85;
}
.formation-legend-item .depth-info {
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* Curve legend items */
.curve-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 5px;
  font-size: 0.78rem;
}
.curve-legend-item .curve-line {
  width: 22px;
  height: 3px;
  border-radius: 2px;
  flex-shrink: 0;
}
.curve-legend-item .curve-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.curve-legend-item .curve-name {
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.curve-legend-item .curve-range {
  font-size: 0.65rem;
  color: var(--text-muted);
}

/* ── Main viewer area ── */
#viewer-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ════════════════════════════════
   TRACK HEADER ROW
════════════════════════════════ */
#track-headers {
  display: flex;
  flex-shrink: 0;
  background: var(--track-header-bg);
  border-bottom: 2px solid var(--accent);
  overflow: hidden; /* synced with canvas scroll via JS */
}

.track-header {
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 72px;
  user-select: none;
}

/* depth track header */
.track-header.depth-header {
  width: 64px;
  background: var(--depth-bg);
  border-right: 2px solid var(--accent);
}
.track-header.depth-header .th-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-hover);
}

.track-header .th-curve-name {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.track-header .th-scale {
  font-size: 0.62rem;
  color: var(--text-muted);
  margin-top: 2px;
  text-align: center;
  white-space: nowrap;
}
.track-header .th-unit {
  font-size: 0.62rem;
  color: var(--text-muted);
  margin-top: 1px;
}
.track-header .th-scale-bar {
  width: 90%;
  height: 3px;
  border-radius: 2px;
  margin-top: 5px;
}

/* formation top track header */
.track-header.formation-header {
  background: rgba(139,92,246,0.1);
  border-right: 2px solid var(--border);
}

/* ════════════════════════════════
   CANVAS SCROLL WRAPPER
════════════════════════════════ */
#canvas-scroll {
  flex: 1;
  overflow: auto;
  position: relative;
  cursor: ns-resize;
  background: var(--track-bg);
}

#canvas-inner {
  display: flex;
  position: relative;
}

/* Depth column canvas */
#depth-canvas {
  position: sticky;
  left: 0;
  z-index: 10;
  flex-shrink: 0;
  background: var(--depth-bg);
  border-right: 2px solid var(--accent);
  display: block;
}

/* Individual track canvases */
.track-canvas {
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  display: block;
  image-rendering: crisp-edges;
}

/* Formation tops overlay canvas — absolute, covers all tracks */
#formation-overlay {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 5;
}

/* ════════════════════════════════
   CROSSHAIR DEPTH CURSOR
════════════════════════════════ */
#depth-cursor {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(56,189,248,0.6);
  pointer-events: none;
  z-index: 20;
  display: none;
}
#depth-cursor-label {
  position: absolute;
  right: 8px;
  top: -10px;
  background: rgba(14,165,233,0.9);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
  pointer-events: none;
}

/* ════════════════════════════════
   LOADING / ERROR STATES
════════════════════════════════ */
#lv-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-main);
  z-index: 200;
  gap: 16px;
}
#lv-loading.hidden { display: none; }

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-hover);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

#lv-error {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-main);
  z-index: 200;
  gap: 12px;
  text-align: center;
  padding: 40px;
}
#lv-error.hidden { display: none; }
#lv-error .err-icon { font-size: 3rem; opacity: 0.5; }
#lv-error .err-title { font-size: 1.1rem; font-weight: 700; color: #f87171; }
#lv-error .err-msg { font-size: 0.85rem; color: var(--text-muted); max-width: 420px; }

/* ════════════════════════════════
   NO DATA PLACEHOLDER
════════════════════════════════ */
#lv-nodata {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-main);
  z-index: 200;
  gap: 14px;
  text-align: center;
  padding: 40px;
}
#lv-nodata.hidden { display: none; }
#lv-nodata .nd-icon { font-size: 3.5rem; opacity: 0.35; }
#lv-nodata .nd-title { font-size: 1.1rem; font-weight: 700; color: var(--text-main); }
#lv-nodata .nd-msg { font-size: 0.85rem; color: var(--text-muted); max-width: 380px; line-height: 1.6; }

/* ════════════════════════════════
   DEPTH SCALE MINI-MAP (right)
════════════════════════════════ */
#minimap {
  width: 28px;
  flex-shrink: 0;
  background: var(--bg-sidebar);
  border-left: 1px solid var(--border);
  position: relative;
  cursor: pointer;
  overflow: hidden;
}
#minimap-thumb {
  position: absolute;
  left: 3px;
  right: 3px;
  background: rgba(14,165,233,0.25);
  border: 1px solid rgba(14,165,233,0.5);
  border-radius: 3px;
  pointer-events: none;
  min-height: 8px;
}

/* ════════════════════════════════
   TOOLTIP
════════════════════════════════ */
#lv-tooltip {
  position: fixed;
  background: rgba(15,23,42,0.95);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 8px 12px;
  font-size: 0.75rem;
  color: var(--text-main);
  pointer-events: none;
  z-index: 999;
  display: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  min-width: 140px;
}
#lv-tooltip .tt-depth {
  font-size: 0.7rem;
  color: var(--accent-hover);
  font-weight: 700;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 4px;
  margin-bottom: 5px;
}
#lv-tooltip .tt-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 3px;
}
#lv-tooltip .tt-name { color: var(--text-muted); }
#lv-tooltip .tt-val  { font-weight: 600; }

/* ════════════════════════════════
   STATUS BAR
════════════════════════════════ */
#status-bar {
  height: 26px;
  background: var(--bg-sidebar);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 20px;
  font-size: 0.68rem;
  color: var(--text-muted);
  flex-shrink: 0;
}
#status-bar .sb-item { display: flex; align-items: center; gap: 5px; }
#status-bar .sb-val  { color: var(--text-main); font-weight: 600; }
#status-bar .sb-sep  { width: 1px; height: 14px; background: var(--border); }