/* Greenfield Assessment Platform — Dark theme */
:root {
  --bg: #0f0f13; --bg2: #1a1a22; --bg3: #242430;
  --fg: #eeeef0; --fg2: #a0a0aa; --fg3: #666670;
  --accent: #6c63ff; --accent2: #8b83ff;
  --green: #34d399; --red: #f87171; --yellow: #fbbf24; --blue: #60a5fa;
  --border: rgba(255,255,255,0.08);
  --radius: 10px;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg); color: var(--fg); line-height: 1.6; min-height: 100vh; }
a { color: var(--accent2); text-decoration: none; }

/* Layout */
.app { display: flex; min-height: 100vh; }
.sidebar { width: 260px; background: var(--bg2); border-right: 1px solid var(--border); padding: 20px; flex-shrink: 0; display: flex; flex-direction: column; }
.main { flex: 1; padding: 24px 32px; overflow-y: auto; max-height: 100vh; }

/* Sidebar */
.sidebar h1 { font-size: 1rem; color: var(--accent2); margin-bottom: 4px; }
.sidebar .subtitle { font-size: 0.75rem; color: var(--fg3); margin-bottom: 20px; }
.sidebar .projects-label { font-size: 0.7rem; color: var(--fg3); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.project-item { padding: 8px 12px; border-radius: 6px; cursor: pointer; font-size: 0.85rem; margin-bottom: 4px; transition: background 0.15s; }
.project-item:hover { background: var(--bg3); }
.project-item.active { background: var(--accent); color: white; }
.project-item .status { font-size: 0.7rem; color: var(--fg3); }
.project-item.active .status { color: rgba(255,255,255,0.7); }
.btn-new-project { width: 100%; padding: 10px; background: var(--bg3); border: 1px dashed var(--border); border-radius: 6px; color: var(--fg2); cursor: pointer; font-size: 0.85rem; margin-bottom: 16px; transition: all 0.15s; }
.btn-new-project:hover { border-color: var(--accent); color: var(--accent); }

/* Cards */
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.card h3 { font-size: 0.95rem; margin-bottom: 12px; }

/* Steps bar */
.steps { display: flex; gap: 4px; margin-bottom: 24px; }
.step { flex: 1; padding: 10px 12px; background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; text-align: center; font-size: 0.8rem; color: var(--fg3); cursor: pointer; transition: all 0.15s; }
.step.active { background: var(--accent); color: white; border-color: var(--accent); }
.step.done { background: rgba(52,211,153,0.1); border-color: var(--green); color: var(--green); }
.step:hover:not(.active) { border-color: var(--fg3); }

/* Upload */
.upload-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.upload-card { background: var(--bg3); border: 2px dashed var(--border); border-radius: var(--radius); padding: 20px; text-align: center; cursor: pointer; transition: all 0.2s; }
.upload-card:hover { border-color: var(--accent); }
.upload-card.uploaded { border-color: var(--green); border-style: solid; }
.upload-card .icon { font-size: 1.5rem; margin-bottom: 8px; }
.upload-card .label { font-size: 0.85rem; font-weight: 600; }
.upload-card .hint { font-size: 0.7rem; color: var(--fg3); margin-top: 4px; }
.upload-card .check { color: var(--green); }
.upload-card input[type=file] { display: none; }

/* Buttons */
.btn { padding: 10px 20px; border: none; border-radius: 6px; font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: all 0.15s; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent2); }
.btn-primary:disabled { background: var(--bg3); color: var(--fg3); cursor: not-allowed; }
.btn-secondary { background: var(--bg3); color: var(--fg2); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--fg3); }
.btn-sm { padding: 6px 12px; font-size: 0.75rem; }
.btn-row { display: flex; gap: 8px; margin-top: 16px; }

/* Pipeline stages */
.stage-list { display: flex; flex-direction: column; gap: 8px; }
.stage-card { display: flex; align-items: center; gap: 12px; padding: 14px 16px; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; }
.stage-card.running { border-color: var(--blue); }
.stage-card.complete { border-color: var(--green); }
.stage-card.error { border-color: var(--red); }
.stage-icon { width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.8rem; flex-shrink: 0; }
.stage-icon.pending { background: var(--bg3); color: var(--fg3); }
.stage-icon.running { background: rgba(96,165,250,0.2); color: var(--blue); }
.stage-icon.complete { background: rgba(52,211,153,0.2); color: var(--green); }
.stage-name { font-weight: 600; font-size: 0.85rem; }
.stage-detail { font-size: 0.75rem; color: var(--fg2); margin-top: 2px; }

/* Results */
.results-table { width: 100%; border-collapse: collapse; }
.results-table th { text-align: left; padding: 10px 12px; background: var(--bg3); color: var(--fg2); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.5px; }
.results-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 0.85rem; }
.results-table tr:hover { background: rgba(255,255,255,0.02); }
.score { font-weight: 700; font-size: 1rem; }
.score.high { color: var(--green); }
.score.mid { color: var(--yellow); }
.score.low { color: var(--red); }
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 0.7rem; font-weight: 600; }
.badge-rec { background: rgba(52,211,153,0.15); color: var(--green); }
.badge-feas { background: rgba(251,191,36,0.15); color: var(--yellow); }
.badge-not { background: rgba(248,113,113,0.15); color: var(--red); }

/* Tabs */
.tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--border); padding-bottom: 0; }
.tab { padding: 8px 16px; font-size: 0.8rem; color: var(--fg3); cursor: pointer; border-bottom: 2px solid transparent; transition: all 0.15s; }
.tab.active { color: var(--accent2); border-color: var(--accent); }
.tab:hover:not(.active) { color: var(--fg); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Conflict list */
.conflict-item { padding: 10px 14px; border-left: 3px solid var(--red); background: rgba(248,113,113,0.05); border-radius: 0 6px 6px 0; margin-bottom: 6px; font-size: 0.8rem; }
.conflict-item.high { border-color: var(--red); }
.conflict-item.medium { border-color: var(--yellow); background: rgba(251,191,36,0.05); }
.conflict-item.critical { border-color: #dc2626; background: rgba(220,38,38,0.08); }

/* 3D viewer */
#viewer3d-wrap { background: var(--bg2); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); }
#viewer3d-wrap canvas { width: 100%; height: 450px; display: block; }
.viewer-controls { padding: 8px 12px; background: rgba(0,0,0,0.3); display: flex; gap: 8px; align-items: center; }
.viewer-controls select { background: var(--bg3); color: var(--fg); border: 1px solid var(--border); border-radius: 4px; padding: 4px 8px; font-size: 0.75rem; }
.viewer-controls label { font-size: 0.75rem; color: var(--fg3); }

/* Entities table */
.entity-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.entity-table th { text-align: left; padding: 8px; background: var(--bg3); font-size: 0.7rem; text-transform: uppercase; color: var(--fg3); }
.entity-table td { padding: 8px; border-bottom: 1px solid var(--border); }
.hazard-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }

/* Empty / loading states */
.empty { text-align: center; padding: 40px; color: var(--fg3); }
.spinner { display: inline-block; width: 18px; height: 18px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 900px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
}