/* Iowa State University IMSE - HAM Lab - Surface Roughness Analysis Workbench */
:root {
  /* Dark Theme (Default) */
  --bg-app: #111215;
  --bg-sidebar: #17181c;
  --bg-surface: #1c1d22;
  --bg-subtle: #23252b;
  --border-color: #2e3038;
  --border-subtle: #26282f;
  --text-main: #f3f4f6;
  --text-secondary: #c7cbd3;
  --text-muted: #8e94a0;

  /* Iowa State University Cardinal */
  --isu-cardinal: #c8102e;
  --isu-cardinal-hover: #a60d26;
  --isu-cardinal-subtle: rgba(200, 16, 46, 0.12);

  --primary: var(--isu-cardinal);
  --primary-hover: var(--isu-cardinal-hover);

  --badge-bg: #23252b;
  --badge-border: #353842;
  --badge-text: #d1d5db;
  --badge-pass-text: #4ade80;
  --badge-warn-text: #fbbf24;

  --chart-bg: #1c1d22;
  --chart-grid: #282a31;
  --chart-text: #c7cbd3;
}

[data-theme="light"] {
  /* High-Contrast Light Theme */
  --bg-app: #f1f3f5;
  --bg-sidebar: #ffffff;
  --bg-surface: #ffffff;
  --bg-subtle: #f8fafc;
  --border-color: #cbd5e1;
  --border-subtle: #e2e8f0;
  --text-main: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;

  --isu-cardinal: #c8102e;
  --isu-cardinal-hover: #a60d26;
  --isu-cardinal-subtle: #fef2f2;

  --primary: var(--isu-cardinal);
  --primary-hover: var(--isu-cardinal-hover);

  --badge-bg: #f1f5f9;
  --badge-border: #cbd5e1;
  --badge-text: #0f172a;
  --badge-pass-text: #15803d;
  --badge-warn-text: #b45309;

  --chart-bg: #ffffff;
  --chart-grid: #e2e8f0;
  --chart-text: #0f172a;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  line-height: 1.45;
}

/* App Container */
.app-container {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 310px;
  min-width: 290px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 1.15rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-dot {
  width: 9px;
  height: 9px;
  background-color: var(--isu-cardinal);
  border-radius: 1px;
  margin-top: 3px;
  flex-shrink: 0;
}

.brand-text-block {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand-univ {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-main);
}

.brand-dept {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  line-height: 1.25;
}

.sidebar-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-select, .form-input {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.45rem 0.65rem;
  border-radius: 2px;
  font-size: 0.84rem;
  outline: none;
  transition: border-color 0.15s ease;
}

.form-select:focus, .form-input:focus {
  border-color: var(--primary);
}

/* Dropzone */
.dropzone {
  border: 1px dashed var(--border-color);
  border-radius: 2px;
  padding: 0.85rem 0.8rem;
  text-align: center;
  background: var(--bg-subtle);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.15s ease;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: var(--isu-cardinal-subtle);
}

.dropzone-file-info {
  flex: 1;
  text-align: left;
}

.dropzone-text {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-main);
}

.dropzone-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.dropzone-replace-btn {
  display: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.55rem;
  border-radius: 2px;
  cursor: pointer;
}

.dropzone.has-file {
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--isu-cardinal);
  background: var(--bg-subtle);
  padding: 0.75rem 0.85rem;
}

.dropzone.has-file .dropzone-text {
  color: var(--text-main);
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  font-size: 0.84rem;
  font-weight: 700;
  word-break: break-all;
}

.dropzone.has-file .dropzone-hint {
  color: var(--text-muted);
  font-size: 0.72rem;
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  margin-top: 0.2rem;
}

.dropzone.has-file .dropzone-replace-btn {
  display: inline-block;
}

/* Filtration Panel */
details.standards-panel {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 0.55rem 0.7rem;
}

details.standards-panel summary {
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  color: var(--text-secondary);
  line-height: 1.35;
}

details.standards-panel[open] summary {
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.panel-content {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

/* System Status */
.system-status,
.engine-status {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: auto;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border-subtle);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #94a3b8;
  transition: background 0.2s ease, box-shadow 0.2s ease;
  flex-shrink: 0;
}

.status-dot.ready {
  background: #22c55e;
}

.status-dot.analyzing {
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.25);
  animation: dot-pulse 1.2s infinite ease-in-out;
}

@keyframes dot-pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.9);
  }
}

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--border-subtle);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 0.45rem;
  display: none;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
  padding: 1.25rem 1.5rem;
}

.main-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.65rem;
}

.inst-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--isu-cardinal);
  margin-bottom: 0.2rem;
}

.main-header {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.sub-header {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* Subtle Icon Theme Button */
.theme-icon-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  transition: all 0.15s ease;
}

.theme-icon-btn:hover {
  border-color: var(--primary);
  color: var(--text-main);
}

.theme-icon {
  width: 16px;
  height: 16px;
}

/* Empty State */
#empty-state {
  padding: 3.5rem 2rem;
  text-align: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 2px;
}

/* Status Ribbon */
.status-ribbon {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 0.65rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.84rem;
}

.ribbon-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.ribbon-label {
  color: var(--text-muted);
  font-weight: 500;
}

.ribbon-value {
  font-weight: 600;
  color: var(--text-main);
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  font-variant-numeric: tabular-nums;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  color: var(--badge-text);
}

.badge-pass {
  color: var(--badge-pass-text);
}

.badge-warn {
  color: var(--badge-warn-text);
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

@media (max-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

.chart-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 0.65rem;
  min-height: 520px;
  display: flex;
  flex-direction: column;
}

#chart-container {
  flex: 1;
  width: 100%;
  height: 500px;
}

/* KPI Card */
.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.kpi-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.kpi-value-primary {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.15;
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  font-variant-numeric: tabular-nums;
}

.kpi-value-sub {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  font-family: 'Consolas', 'JetBrains Mono', monospace;
}

.sec-metric {
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.55rem;
  margin-top: 0.65rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.sec-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.sec-val {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  font-variant-numeric: tabular-nums;
}

/* Tabs */
.tabs-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 0.85rem;
}

.tab-nav {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.4rem;
  margin-bottom: 0.85rem;
}

.tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.84rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  color: var(--text-main);
  border-bottom-color: var(--isu-cardinal);
  background: transparent;
}

/* Tab Content Display Rules */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Comparator Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.data-table th, .data-table td {
  padding: 0.6rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.data-table th {
  color: var(--text-secondary);
  font-weight: 600;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-subtle);
}

.data-table td:nth-child(2) {
  font-weight: 600;
  color: var(--text-main);
  font-family: 'Consolas', 'JetBrains Mono', monospace;
}

/* Report View */
.report-view {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  padding: 0.9rem 1rem;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  white-space: pre-wrap;
  max-height: 400px;
  overflow-y: auto;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.btn {
  background: var(--primary);
  color: #ffffff;
  border: 1px solid var(--primary-hover);
  padding: 0.45rem 0.95rem;
  border-radius: 2px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.btn:hover {
  background: var(--primary-hover);
}