/* ============================================================
   style.css  –  JSPlaskin  (Plasma Lab Dark)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* Backgrounds */
  --bg:           #07090f;
  --bg-panel:     #0c1120;
  --bg-elevated:  #101828;
  --bg-menu:      #0c1120;

  /* Borders */
  --border:       #1a253a;
  --border-mid:   #1e2d45;
  --border-strong: #253550;

  /* Text */
  --text:         #ccd8f0;
  --text-muted:   #8099c4;
  --text-dim:     #4d6490;

  /* Accent — ionised blue */
  --accent:       #4d9fff;
  --accent-bright: #7dbfff;
  --accent-dim:   rgba(77, 159, 255, 0.10);
  --accent-glow:  0 0 16px rgba(77, 159, 255, 0.25);

  /* Interactive states */
  --sel-bg:       #0b2a4e;
  --sel-border:   #17477a;
  --sel-text:     #90c2ff;
  --row-hover:    #0d1d33;
  --menu-hover:   var(--accent-dim);

  /* Tabs */
  --tab-active:   #0c1120;
  --tab-inactive: #07090f;

  /* Buttons */
  --btn-bg:       #101828;
  --btn-border:   #1e2d45;
  --btn-hover:    #152035;
  --btn-active:   #0a1220;
  --btn-text:     #8099c4;

  /* Misc */
  --header-bg:    #07090f;
  --shadow:       0 6px 24px rgba(0, 0, 0, 0.65);
  --shadow-sm:    0 2px 10px rgba(0, 0, 0, 0.5);
  --scroll-track: #07090f;
  --scroll-thumb: #1a2d48;
  --scroll-hover: #24406a;

  /* Chart panel */
  --right-panel-bg: #0c1120;
}

/* ============================================================
   Light theme overrides
   ============================================================ */

[data-theme="light"] {
  /* Backgrounds */
  --bg:           #f4f6fb;
  --bg-panel:     #eaecf4;
  --bg-elevated:  #ffffff;
  --bg-menu:      #ffffff;

  /* Borders */
  --border:       #d0d6e8;
  --border-mid:   #bcc8dc;
  --border-strong: #a8b8d0;

  /* Text */
  --text:         #1a2540;
  --text-muted:   #4a6080;
  --text-dim:     #8098b8;

  /* Accent */
  --accent:       #2070d4;
  --accent-bright: #3a88f0;
  --accent-dim:   rgba(32, 112, 212, 0.10);
  --accent-glow:  0 0 16px rgba(32, 112, 212, 0.15);

  /* Interactive states */
  --sel-bg:       #ddeeff;
  --sel-border:   #90bce8;
  --sel-text:     #0a3d8a;
  --row-hover:    #ecf0fa;
  --menu-hover:   var(--accent-dim);

  /* Tabs */
  --tab-active:   #ffffff;
  --tab-inactive: #f4f6fb;

  /* Buttons */
  --btn-bg:       #eef2fc;
  --btn-border:   #c8d4ec;
  --btn-hover:    #dde4f5;
  --btn-active:   #ccd6f0;
  --btn-text:     #3a5888;

  /* Misc */
  --header-bg:    #eaecf4;
  --shadow:       0 6px 24px rgba(0, 0, 0, 0.10);
  --shadow-sm:    0 2px 10px rgba(0, 0, 0, 0.06);
  --scroll-track: #eaecf4;
  --scroll-thumb: #c0cce0;
  --scroll-hover: #a0b0cc;

  /* Chart panel */
  --right-panel-bg: #f8f9fd;
}

[data-theme="light"] #topbar::after {
  background: linear-gradient(90deg,
    var(--accent) 0%,
    rgba(32, 112, 212, 0.3) 35%,
    transparent 70%);
}

/* ---- Reset ---- */
* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- App shell ---- */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ============================================================
   Topbar
   ============================================================ */

#topbar {
  display: flex;
  align-items: center;
  background: var(--bg);
  border-bottom: 1px solid var(--border-mid);
  height: 36px;
  padding: 0 12px 0 0;
  gap: 0;
  flex-shrink: 0;
  position: relative;
}

/* Accent hairline along topbar bottom */
#topbar::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg,
    var(--accent) 0%,
    rgba(77,159,255,0.3) 35%,
    transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}

/* Brand pill */
#app-brand {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 16px 0 12px;
  height: 100%;
  border-right: 1px solid var(--border);
  margin-right: 4px;
  flex-shrink: 0;
}

#app-brand .brand-icon {
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
}

#app-brand .brand-icon svg {
  display: block;
}

#app-brand .brand-name {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.08em;
  opacity: 0.9;
}

/* ============================================================
   Menubar
   ============================================================ */

#menubar {
  display: flex;
  gap: 0;
  height: 100%;
  align-items: center;
  padding: 0 4px;
}

.menu-label {
  position: relative;
  padding: 4px 11px;
  cursor: pointer;
  border-radius: 5px;
  user-select: none;
  white-space: nowrap;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.01em;
  transition: color 0.12s, background 0.12s;
}
.menu-label:hover,
.menu-label.open {
  background: var(--accent-dim);
  color: var(--accent);
}

.menu-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: var(--bg-menu);
  border: 1px solid var(--border-mid);
  border-radius: 7px;
  box-shadow: var(--shadow);
  z-index: 9000;
  min-width: 210px;
  padding: 5px;
}
.menu-label.open .menu-dropdown { display: block; }

.menu-item {
  padding: 6px 12px;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  font-size: 12px;
  border-radius: 5px;
  color: var(--text);
  transition: background 0.1s, color 0.1s;
}
.menu-item:hover {
  background: var(--accent-dim);
  color: var(--accent);
}
.menu-item.checked::before {
  content: '✓  ';
  font-size: 10px;
  color: var(--accent);
}
.menu-item:not(.checked)::before {
  content: '   ';
  font-size: 10px;
  white-space: pre;
}
.menu-sep {
  height: 1px;
  background: var(--border);
  margin: 5px 0;
}

/* ============================================================
   Theme toggle button
   ============================================================ */

#theme-toggle {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-right: 8px;
  padding: 0;
  background: none;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
#theme-toggle:hover {
  color: var(--text);
  border-color: var(--border);
  background: var(--accent-dim);
}

/* ============================================================
   Status bar
   ============================================================ */

#status-bar {
  flex: 1;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
  padding-left: 14px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  letter-spacing: 0.03em;
}

/* ============================================================
   Main content
   ============================================================ */

#main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ============================================================
   Tab bar — underline style
   ============================================================ */

#tab-bar {
  display: flex;
  background: var(--bg);
  border-bottom: 1px solid var(--border-mid);
  padding: 0 10px;
  gap: 0;
  flex-shrink: 0;
  align-items: flex-end;
  height: 40px;
}

.tab-btn {
  padding: 8px 20px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-dim);
  outline: none;
  transition: color 0.15s, border-color 0.15s;
  letter-spacing: 0.03em;
  white-space: nowrap;
  margin-bottom: -1px;
  border-radius: 0;
}
.tab-btn:hover:not(.active) {
  color: var(--text-muted);
  border-bottom-color: var(--border-strong);
}
.tab-btn.active {
  color: var(--accent);
  font-weight: 500;
  border-bottom-color: var(--accent);
}

/* ============================================================
   Tab panes
   ============================================================ */

.tab-pane {
  display: none;
  flex: 1;
  overflow: hidden;
}
.tab-pane.active {
  display: flex;
  flex-direction: row;
}

/* ============================================================
   Left panel
   ============================================================ */

.left-panel {
  width: 240px;
  min-width: 160px;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-mid);
  background: var(--bg-panel);
  flex-shrink: 0;
  resize: horizontal;
  overflow: auto;
}

.list-wrap {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

/* ============================================================
   Data tables
   ============================================================ */

.data-list {
  width: 100%;
  border-collapse: collapse;
}

.data-list thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border-mid);
  padding: 5px 8px;
  font-weight: 500;
  font-size: 10px;
  text-align: left;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.data-list thead th:first-child {
  text-align: right;
  width: 38px;
}

.data-list tbody tr {
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid var(--border);
  transition: background 0.07s;
}
.data-list tbody tr:last-child { border-bottom: none; }
.data-list tbody tr:hover:not(.selected) { background: var(--row-hover); }
.data-list tbody tr.selected {
  background: var(--sel-bg);
  border-bottom-color: var(--sel-border);
}

.data-list tbody td {
  padding: 4px 8px;
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
  color: var(--text);
}
.data-list tbody td:first-child {
  text-align: right;
  color: var(--text-dim);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  width: 38px;
  padding-right: 10px;
}
.data-list tbody tr.selected td { color: var(--sel-text); }
.data-list tbody tr.selected td:first-child { color: var(--accent); }

/* ============================================================
   Filter row (sensitivity tab)
   ============================================================ */

.filter-row {
  padding: 8px 10px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  flex-shrink: 0;
  background: var(--bg-panel);
}
.filter-row label {
  color: var(--text-dim);
  white-space: nowrap;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.filter-row select {
  flex: 1;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  padding: 4px 8px;
  border: 1px solid var(--btn-border);
  border-radius: 5px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  cursor: pointer;
  transition: border-color 0.15s;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%236880a8' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 24px;
}
.filter-row select:focus { border-color: var(--accent); }

/* ============================================================
   Multi-select hint
   ============================================================ */

.list-hint {
  padding: 5px 8px;
  font-size: 10px;
  font-family: 'IBM Plex Mono', monospace;
  color: var(--text-dim);
  text-align: center;
  border-top: 1px solid var(--border);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

/* ============================================================
   Plot buttons
   ============================================================ */

.plot-btn {
  margin: 8px 10px;
  padding: 7px 16px;
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: 6px;
  cursor: pointer;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  font-weight: 500;
  color: var(--btn-text);
  flex-shrink: 0;
  transition: background 0.12s, border-color 0.12s, color 0.12s, transform 0.08s;
  letter-spacing: 0.03em;
  text-align: center;
}
.plot-btn:hover {
  background: var(--btn-hover);
  border-color: var(--accent);
  color: var(--accent);
}
.plot-btn:active {
  background: var(--btn-active);
  transform: translateY(1px);
}

/* ============================================================
   Right panel (charts) — kept light for Plotly compatibility
   ============================================================ */

.right-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--right-panel-bg);
  min-width: 0;
}

.chart-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.chart-area > div {
  flex: 1;
  min-height: 0;
}

.source-charts {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.source-charts > div {
  flex: 1;
  min-height: 0;
}
.source-charts > div + div {
  border-top: 1px solid var(--border);
}

/* ============================================================
   Drop overlay
   ============================================================ */

#drop-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7, 9, 15, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9900;
}
#drop-overlay.hidden { display: none; }

.drop-msg {
  background: var(--bg-elevated);
  border: 2px dashed var(--accent);
  border-radius: 12px;
  padding: 52px 80px;
  font-size: 20px;
  font-weight: 400;
  color: var(--text);
  box-shadow: var(--shadow), 0 0 60px rgba(77,159,255,0.12);
  text-align: center;
  animation: dropPulse 2.4s ease-in-out infinite;
}
.drop-msg small {
  display: block;
  margin-top: 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

@keyframes dropPulse {
  0%, 100% { border-color: rgba(77,159,255,0.5); }
  50%       { border-color: rgba(77,159,255,1);   }
}

/* ============================================================
   Loading overlay
   ============================================================ */

#loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7, 9, 15, 0.88);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9800;
  gap: 22px;
}
#loading-overlay.hidden { display: none; }

.spinner {
  width: 34px;
  height: 34px;
  border: 2px solid var(--border-mid);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#loading-msg {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* ============================================================
   Custom scrollbars
   ============================================================ */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--scroll-track); }
::-webkit-scrollbar-thumb { background: var(--scroll-thumb); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--scroll-hover); }