/* ── Reset & variables ──────────────────────────────────────────── */

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

:root {
  --bg:        #0f1117;
  --surface:   #181a20;
  --surface2:  #1e2028;
  --border:    #2a2d38;
  --text:      #e2e4e9;
  --muted:     #8b8fa3;
  --accent:    #3ecf8e;
  --accent-dim:#2a9d6a;
  --danger:    #ef4444;
  --log-bg:    #0c0d10;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
  --radius:    8px;
}

html {
  font-size: 15px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ────────────────────────────────────────────────────── */

header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
}

.header-inner {
  display: flex;
  align-items: stretch;
  gap: 0.9rem;
}

.header-inner h1 {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.brand-logo {
  height: 100%;
  max-height: 3rem;
  width: auto;
  display: block;
  background: #000;
  object-fit: contain;
  padding-right: 0.45rem;
}

.accent {
  color: var(--accent);
}

.subtitle {
  color: var(--muted);
  font-size: 0.85rem;
}

/* ── Main ──────────────────────────────────────────────────────── */

main {
  flex: 1;
  padding: 2rem 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ── Upload ────────────────────────────────────────────────────── */

#upload-section {
  max-width: 560px;
  margin: 4rem auto 0;
}

#drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

#drop-zone:hover,
#drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(62, 207, 142, 0.04);
}

.upload-icon {
  color: var(--muted);
  margin-bottom: 1rem;
}

.drop-content h2 {
  font-size: 1.25rem;
  margin-bottom: 0.3rem;
}

.drop-content p {
  color: var(--muted);
}

.muted  { color: var(--muted); }
.small  { font-size: 0.8rem; }

/* ── Buttons ───────────────────────────────────────────────────── */

.btn {
  display: inline-block;
  padding: 0.55rem 1.3rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.btn:hover {
  background: var(--surface2);
  border-color: var(--muted);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
}

/* ── Upload progress bar ───────────────────────────────────────── */

#upload-progress {
  margin-top: 1.5rem;
  text-align: center;
}

.upload-bar-track {
  height: 6px;
  background: var(--surface2);
  border-radius: 3px;
  overflow: hidden;
}

.upload-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.15s ease;
}

#upload-status {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ── Processing panels ─────────────────────────────────────────── */

.panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 900px) {
  .panels {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.panel-header h2 {
  font-size: 0.9rem;
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#elapsed {
  font-size: 0.8rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

/* ── Badge ─────────────────────────────────────────────────────── */

.badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
}

.badge-processing {
  background: rgba(62, 207, 142, 0.15);
  color: var(--accent);
}

.badge-completed {
  background: rgba(62, 207, 142, 0.25);
  color: #4ade80;
}

.badge-failed {
  background: rgba(239, 68, 68, 0.2);
  color: var(--danger);
}

/* ── Log output ────────────────────────────────────────────────── */

.log-panel {
  min-height: 480px;
  max-height: 70vh;
}

.log-output {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.6;
  background: var(--log-bg);
  white-space: pre-wrap;
  word-break: break-all;
  color: #b0b4c0;
}

.log-output .log-line {
  display: block;
}

.log-output .log-step {
  color: var(--accent);
  font-weight: 600;
}

.log-output .log-header {
  color: #7ec8e3;
}

.log-output .log-error {
  color: var(--danger);
}

.log-output .log-stat {
  color: #d4a0ff;
}

.log-output .log-workflow {
  color: #f0c674;
  font-weight: 700;
  font-size: 0.85rem;
}

/* ── Workflow tracker ──────────────────────────────────────────── */

#workflow-tracker {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.wf-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.78rem;
  font-weight: 500;
  transition: border-color 0.2s, background 0.2s;
}

.wf-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.2s, box-shadow 0.2s;
}

.wf-item.wf-pending .wf-dot {
  background: var(--border);
}

.wf-item.wf-running {
  border-color: var(--accent);
}

.wf-item.wf-running .wf-dot {
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  animation: pulse-dot 1.5s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

.wf-item.wf-completed .wf-dot {
  background: #4ade80;
}

.wf-item.wf-completed .wf-label {
  color: #4ade80;
}

.wf-item.wf-failed .wf-dot {
  background: var(--danger);
}

.wf-item.wf-failed .wf-label {
  color: var(--danger);
}

/* ── Workflow selector tabs ────────────────────────────────────── */

.workflow-selector {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
  padding: 0 0.5rem;
  flex-shrink: 0;
}

.wf-tab {
  padding: 0.45rem 0.9rem;
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.wf-tab:hover:not(:disabled) {
  color: var(--text);
}

.wf-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.wf-tab:disabled,
.wf-tab.wf-tab-disabled {
  color: var(--border);
  cursor: not-allowed;
  opacity: 0.5;
}

/* ── Workflow selection checkboxes ─────────────────────────────── */

.workflow-options {
  margin-top: 0.75rem;
}

.wf-options-label {
  margin-bottom: 0.4rem;
}

.wf-checkboxes {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
}

.wf-check {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.82rem;
  color: var(--text);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: background 0.15s;
}

.wf-check:hover {
  background: rgba(255, 255, 255, 0.04);
}

.wf-check input[type="checkbox"] {
  accent-color: var(--accent);
  cursor: pointer;
  width: 14px;
  height: 14px;
}

/* ── Sample download link ─────────────────────────────────────── */

.sample-download {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.sample-download:hover {
  text-decoration: underline;
}

/* ── 3-D Viewer ────────────────────────────────────────────────── */

.viewer-panel {
  min-height: 480px;
}

#viewer-container {
  position: relative;
  flex: 1;
  min-height: 0;           /* allow flex shrinking */
  background: #0a0b0e;
  overflow: hidden;
}

#viewer-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.85rem;
}

#viewer-placeholder.hidden {
  display: none;
}

#viewer-canvas {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#point-stats {
  font-size: 0.78rem;
  font-family: var(--font-mono);
}

/* ── Actions bar ───────────────────────────────────────────────── */

#actions-bar {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  align-items: center;
}

.actions-buttons {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

.actions-note {
  margin: 0;
  max-width: 780px;
  text-align: center;
  font-size: 0.72rem;
  line-height: 1.45;
}

/* ── System monitoring panels ──────────────────────────────────── */

.monitor-panels {
  margin-top: 1rem;
}

.monitor-panel {
  height: 220px;
  min-height: 220px;
}

.monitor-val {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.chart-container {
  flex: 0 0 170px;
  padding: 0.5rem;
  background: var(--log-bg);
  position: relative;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

/* ── Footer ────────────────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 1rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
}

.footer-sep {
  margin: 0 0.4rem;
}

.footer-link {
  color: var(--accent);
  text-decoration: none;
}

.footer-link:hover {
  text-decoration: underline;
}

/* ── Scrollbar ─────────────────────────────────────────────────── */

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}