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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #242836;
  --border: #2e3348;
  --text: #e1e4ed;
  --text2: #8b90a5;
  --accent: #6c8cff;
  --accent2: #4ecdc4;
  --danger: #ff6b6b;
  --success: #51cf66;
  --warn: #ffd43b;
  --radius: 8px;
  --font: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
}

#app { display: flex; flex-direction: column; height: 100vh; min-height: 100dvh; }

#header {
  display: flex; align-items: center; gap: 16px;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
#header h1 { font-size: 18px; font-weight: 700; color: var(--accent); }
.subtitle { color: var(--text2); font-size: 13px; }
.badge {
  font-size: 11px; padding: 3px 10px; border-radius: 12px;
  font-weight: 600; margin-left: auto;
}
.badge.idle { background: var(--surface2); color: var(--text2); }
.badge.working { background: #2a2040; color: var(--accent); animation: pulse 1.5s infinite; }
.badge.done { background: #1a3020; color: var(--success); }
.badge.error { background: #301a1a; color: var(--danger); }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

#main-layout {
  display: flex; flex: 1; overflow: hidden;
}

/* Left panel */
#left-panel {
  width: 320px; min-width: 280px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto; padding: 16px;
}
#left-panel h2 { font-size: 15px; margin-bottom: 12px; color: var(--accent2); }
#left-panel h3 { font-size: 13px; margin-bottom: 8px; color: var(--text2); }

.section { margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--border); }

/* Reaction editor */
.reaction-row {
  display: flex; align-items: center; gap: 6px;
  margin-bottom: 8px; padding: 6px 8px;
  background: var(--surface2); border-radius: var(--radius);
  border: 1px solid var(--border);
}
.reaction-row input[type="text"] {
  flex: 1; min-width: 0;
}
.reaction-row input[type="number"] {
  width: 70px;
}
.reaction-row .btn-remove {
  background: none; border: none; color: var(--danger);
  cursor: pointer; font-size: 16px; padding: 2px 6px;
}
.reaction-row .btn-remove:hover { background: rgba(255,107,107,0.15); border-radius: 4px; }

.reaction-label { font-size: 11px; color: var(--text2); display: block; margin-bottom: 2px; }

/* Inputs */
input, select {
  background: var(--bg); border: 1px solid var(--border);
  color: var(--text); padding: 6px 8px; border-radius: 4px;
  font-size: 13px; font-family: var(--font);
}
input:focus, select:focus { outline: none; border-color: var(--accent); }

label {
  display: block; font-size: 12px; color: var(--text2);
  margin-bottom: 8px;
}
label input, label select { display: block; margin-top: 4px; width: 100%; }

/* Buttons */
.btn {
  display: inline-block; padding: 7px 14px;
  background: var(--surface2); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 13px; cursor: pointer; transition: all 0.15s;
  margin-right: 6px; margin-bottom: 6px;
}
.btn:hover { background: var(--border); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: #5a7ae6; }
.btn-sm { font-size: 12px; padding: 4px 10px; }

/* Right panel */
#right-panel { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

#viz-tabs {
  display: flex; gap: 0; background: var(--surface);
  border-bottom: 1px solid var(--border); padding: 0 12px;
}
.tab {
  padding: 10px 16px; font-size: 13px;
  background: none; border: none; color: var(--text2);
  cursor: pointer; border-bottom: 2px solid transparent;
  transition: all 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-content { display: none; flex: 1; overflow: auto; padding: 12px; }
.tab-content.active { display: flex; flex-direction: column; }

.plot-container { flex: 1; min-height: 400px; }

/* Vertices table */
#vertices-table-wrap { overflow: auto; flex: 1; }
#vertices-table-wrap table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
#vertices-table-wrap th {
  background: var(--surface2); padding: 8px 10px;
  text-align: left; font-weight: 600; color: var(--text2);
  position: sticky; top: 0;
}
#vertices-table-wrap td {
  padding: 6px 10px; border-bottom: 1px solid var(--border);
}
#vertices-table-wrap tr:hover td { background: var(--surface2); }

.tag {
  display: inline-block; padding: 2px 6px; border-radius: 4px;
  font-size: 11px; font-weight: 600;
}
.tag-asym { background: #1a3020; color: var(--success); }
.tag-nonasym { background: #302a1a; color: var(--warn); }
.tag-singular { background: #301a1a; color: var(--danger); }
.tag-invertible { background: #1a2030; color: var(--accent); }

/* SISO info */
#siso-info {
  margin-bottom: 12px; font-size: 13px;
}
#siso-info .path-list {
  max-height: 200px; overflow-y: auto;
  background: var(--surface); border-radius: var(--radius);
  padding: 8px; margin-top: 8px;
}
.path-item {
  display: block; width: 100%; text-align: left;
  padding: 4px 8px; cursor: pointer; border-radius: 4px;
  font-family: var(--font); font-size: 12px;
  margin-bottom: 2px;
  background: none; border: none; color: inherit;
}
.path-item:hover { background: var(--surface2); }
.path-item.selected { background: var(--accent); color: #fff; }
.path-item:focus-visible {
  outline: 2px solid var(--accent2);
  outline-offset: 1px;
}

/* Model info */
#model-info-text {
  font-family: var(--font); font-size: 12px;
  color: var(--text2); white-space: pre-wrap;
  background: var(--bg); padding: 8px; border-radius: var(--radius);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text2); }

@media (max-width: 900px) {
  body {
    height: auto;
    overflow: auto;
  }

  #app {
    height: auto;
  }

  #header {
    flex-wrap: wrap;
    align-items: flex-start;
    row-gap: 6px;
  }

  .subtitle {
    flex-basis: 100%;
  }

  .badge {
    margin-left: 0;
  }

  #main-layout {
    flex-direction: column;
    overflow: visible;
  }

  #left-panel {
    width: 100%;
    min-width: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  #right-panel {
    min-height: 60vh;
  }

  #viz-tabs {
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0 8px;
  }

  .tab {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .tab-content {
    min-height: 320px;
  }

  .plot-container {
    min-height: 320px;
  }
}