/* BotHunter Dashboard: Forensic Workbench */

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

/* === Alpine.js cloak === */
[x-cloak] { display: none !important; }

/* === Design Tokens === */
:root {
  /* Brand gradient */
  --gradient: linear-gradient(135deg, #0057D9 0%, #00C5A0 100%);
  --brand-blue: #0057D9;
  --brand-teal: #00C5A0;

  /* Surfaces: dark elevation scale */
  --surface-base: #0a0e14;
  --surface-card: #0f1419;
  --surface-raised: #151b23;
  --surface-input: #080b10;
  --surface-overlay: #1a2130;

  /* Text hierarchy */
  --ink-primary: #e6edf3;
  --ink-secondary: #9eaab8;
  --ink-tertiary: #6b7a8d;
  --ink-muted: #3d4f63;

  /* Borders: rgba for blending */
  --border-default: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.04);
  --border-emphasis: rgba(255, 255, 255, 0.14);
  --border-focus: rgba(0, 87, 217, 0.5);

  /* Grade badges */
  --grade-pass: #4aba4f;
  --grade-pass-bg: rgba(74, 186, 79, 0.1);
  --grade-marginal: #e6a817;
  --grade-marginal-bg: rgba(230, 168, 23, 0.1);
  --grade-fail: #e05545;
  --grade-fail-bg: rgba(224, 85, 69, 0.1);
  --grade-rejected: #8fa0b3;
  --grade-rejected-bg: rgba(143, 160, 179, 0.1);

  /* Semantic */
  --destructive: #e05545;
  --destructive-bg: rgba(224, 85, 69, 0.08);

  /* Spacing: 4px base */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;

  /* Radius: sharp, technical */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Typography */
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-data: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --text-xs: 12px;
  --text-sm: 13px;
  --text-base: 14px;
  --text-md: 15px;
  --text-lg: 18px;
  --text-xl: 22px;
  --text-2xl: 32px;

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-normal: 200ms ease;
}

/* === Base === */
html { font-size: 14px; scroll-behavior: smooth; }
body {
  font-family: var(--font-ui);
  background: var(--surface-base);
  color: var(--ink-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* === Selection === */
::selection {
  background: rgba(0, 87, 217, 0.3);
  color: var(--ink-primary);
}

/* === Scrollbar (dark theme) === */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.18);
}

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

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

/* === Focus-visible (keyboard nav) === */
:focus-visible {
  outline: 2px solid var(--brand-blue);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* === Layout === */
.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  background: var(--surface-base);
  border-right: 1px solid var(--border-default);
  padding: var(--sp-4) 0;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-brand {
  padding: var(--sp-4) var(--sp-4) var(--sp-6);
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.sidebar-brand img {
  display: block;
  max-width: 140px;
  width: 100%;
  height: auto;
  opacity: 0.95;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding-bottom: var(--sp-4);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  color: var(--ink-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast), background var(--transition-fast);
  border-left: 2px solid transparent;
}

.sidebar-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}

.sidebar-link:hover svg,
.sidebar-link.active svg {
  opacity: 1;
}

.sidebar-link:hover {
  color: var(--ink-primary);
  background: var(--border-subtle);
  text-decoration: none;
}

.sidebar-link.active {
  color: var(--ink-primary);
  border-left-color: var(--brand-blue);
  background: rgba(0, 87, 217, 0.06);
}

/* Nested study list under Studies link */
.sidebar-sublist {
  display: flex;
  flex-direction: column;
  padding: var(--sp-1) 0 var(--sp-2) var(--sp-6);
  margin-left: var(--sp-4);
  border-left: 1px solid var(--border-default);
  gap: 1px;
}

.sidebar-sublink {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 5px var(--sp-3) 5px var(--sp-2);
  color: var(--ink-tertiary);
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: -0.01em;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-sublink-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink-muted);
  flex-shrink: 0;
  transition: background var(--transition-fast);
}

.sidebar-sublink-label {
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.sidebar-sublink:hover {
  color: var(--ink-secondary);
  background: var(--border-subtle);
  text-decoration: none;
}

.sidebar-sublink:hover .sidebar-sublink-dot {
  background: var(--ink-tertiary);
}

.sidebar-sublink.active {
  color: var(--ink-primary);
  background: rgba(0, 87, 217, 0.08);
}

.sidebar-sublink.active .sidebar-sublink-dot {
  background: var(--brand-teal);
  box-shadow: 0 0 6px rgba(0, 197, 160, 0.5);
}

.sidebar-footer {
  padding: var(--sp-3) var(--sp-4);
  border-top: 1px solid var(--border-default);
  font-size: var(--text-xs);
}

.sidebar-logout {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  color: var(--ink-tertiary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.sidebar-logout svg {
  width: 14px;
  height: 14px;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.sidebar-logout:hover {
  color: var(--ink-primary);
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border-emphasis);
  text-decoration: none;
}

.sidebar-logout:hover svg {
  opacity: 1;
}

.main {
  flex: 1;
  padding: var(--sp-6) var(--sp-8);
  overflow-x: auto;
}

/* === Page Header === */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-6);
}

.page-title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-subtitle {
  font-size: var(--text-sm);
  color: var(--ink-secondary);
  margin-top: var(--sp-1);
}

.about-subtitle {
  font-size: var(--text-lg);
  font-weight: 500;
  color: #fff;
}

/* === Cards === */
.card {
  background: var(--surface-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--sp-4);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-3);
}

.card-title {
  font-family: var(--font-ui);
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--ink-primary);
  letter-spacing: -0.01em;
}

.card-flush {
  padding: 0;
}

.card-flush .card-header {
  padding: var(--sp-3) var(--sp-4);
}

/* === Tables === */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

thead th {
  text-align: left;
  padding: var(--sp-2) var(--sp-3);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: var(--text-xs);
  color: var(--ink-secondary);
  border-bottom: 1px solid var(--border-emphasis);
  white-space: nowrap;
}

tbody td {
  padding: var(--sp-2) var(--sp-3);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--ink-secondary);
}

tbody tr {
  transition: background var(--transition-fast);
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

tbody tr:hover td {
  color: var(--ink-primary);
}

tbody tr.clickable {
  cursor: pointer;
}

tbody tr.clickable:hover {
  background: rgba(255, 255, 255, 0.035);
}

tbody tr.clickable:active {
  background: rgba(255, 255, 255, 0.05);
}

/* Data cells: monospace */
.data {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: -0.02em;
}

/* Data link: monospace link in tables */
.data-link {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: -0.02em;
  color: var(--ink-primary);
  font-weight: 600;
}

.data-link:hover {
  color: var(--brand-teal);
  text-decoration: none;
}

/* === Grade Badges === */
.grade {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
}

.grade-pass { color: var(--grade-pass); background: var(--grade-pass-bg); }
.grade-marginal { color: var(--grade-marginal); background: var(--grade-marginal-bg); }
.grade-fail { color: var(--grade-fail); background: var(--grade-fail-bg); }
.grade-rejected { color: var(--grade-rejected); background: var(--grade-rejected-bg); }

.status-live { color: var(--grade-pass); background: var(--grade-pass-bg); }
.status-closing { color: var(--grade-marginal); background: var(--grade-marginal-bg); }
.status-old { color: var(--ink-tertiary); background: var(--border-default); }


/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--gradient);
  color: #fff;
}

.btn-primary:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 12px rgba(0, 87, 217, 0.25);
}

.btn-primary:active {
  filter: brightness(0.95);
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--ink-secondary);
  border: 1px solid var(--border-default);
}

.btn-ghost:hover {
  color: var(--ink-primary);
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border-emphasis);
}

.btn-ghost:active {
  background: rgba(255, 255, 255, 0.05);
}

.btn-danger {
  background: var(--destructive-bg);
  color: var(--destructive);
  border: 1px solid rgba(196, 80, 64, 0.2);
}

.btn-danger:hover {
  background: rgba(196, 80, 64, 0.15);
  border-color: rgba(196, 80, 64, 0.35);
}

.btn-danger:active {
  background: rgba(196, 80, 64, 0.2);
}

.btn:disabled, .btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* === Score Bar (dimension scores) === */
.score-bar {
  height: 6px;
  background: var(--surface-input);
  border-radius: 3px;
  overflow: hidden;
}

.score-bar-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 3px;
  transition: width var(--transition-normal);
}

/* === Composite Score: large display === */
.score-display {
  font-family: var(--font-data);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === Flag Tags === */
.flag {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 500;
  color: var(--grade-fail);
  background: var(--grade-fail-bg);
  margin-right: var(--sp-1);
  margin-bottom: var(--sp-1);
}

/* === Forms / Inputs === */
.input {
  width: 100%;
  padding: var(--sp-2) var(--sp-3);
  background: var(--surface-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--ink-primary);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  transition: border-color var(--transition-fast);
}

.input:focus {
  outline: none;
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 2px var(--border-focus);
}

.input::placeholder {
  color: var(--ink-muted);
}

label {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--ink-secondary);
  letter-spacing: -0.005em;
  margin-bottom: var(--sp-2);
}

/* === Login Page === */
.login-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--surface-base);
}

.login-box {
  width: 340px;
  padding: var(--sp-8);
  background: var(--surface-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
}

.login-brand {
  margin-bottom: var(--sp-8);
  text-align: center;
}

.login-logo {
  max-width: 180px;
  height: auto;
  display: inline-block;
}

.login-error {
  padding: var(--sp-2) var(--sp-3);
  background: var(--destructive-bg);
  border: 1px solid rgba(196, 80, 64, 0.2);
  border-radius: var(--radius-sm);
  color: var(--destructive);
  font-size: var(--text-sm);
  margin-bottom: var(--sp-4);
}

.form-group {
  margin-bottom: var(--sp-4);
}

/* === Chart containers === */
.chart {
  width: 100%;
  height: 280px;
}

.chart-lg {
  height: 360px;
}

/* === Grid layouts === */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--sp-4);
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: var(--sp-4);
}

/* === Stat inline === */
.stat {}

.stat-value {
  font-family: var(--font-ui);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--ink-primary);
  letter-spacing: -0.02em;
}

.stat-label {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--ink-tertiary);
  margin-top: var(--sp-1);
  letter-spacing: -0.005em;
}

/* === Percentage bars (grade distribution) === */
.pct-bar {
  display: flex;
  height: 4px;
  border-radius: 2px;
  overflow: hidden;
  background: var(--surface-input);
}

.pct-pass { background: var(--grade-pass); }
.pct-marginal { background: var(--grade-marginal); }
.pct-fail { background: var(--grade-fail); }
.pct-rejected { background: var(--grade-rejected); }


/* === Env table (respondent detail) === */
.env-table td:first-child {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  color: var(--ink-tertiary);
  white-space: nowrap;
  padding-right: var(--sp-4);
}

.env-table .suspicious {
  color: var(--grade-fail);
}

/* === Breadcrumbs === */
.breadcrumb {
  font-size: var(--text-xs);
  color: var(--ink-tertiary);
  margin-bottom: var(--sp-4);
}

.breadcrumb a {
  color: var(--ink-tertiary);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--ink-secondary);
  text-decoration: none;
}

.breadcrumb-sep {
  margin: 0 var(--sp-1);
  color: var(--ink-muted);
}

.breadcrumb-current {
  color: var(--ink-secondary);
}

/* === Empty State === */
.empty-state {
  text-align: center;
  padding: var(--sp-12);
  color: var(--ink-tertiary);
}

.empty-state-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--sp-4);
  color: var(--ink-muted);
}

.empty-state p {
  max-width: 360px;
  margin: 0 auto;
  line-height: 1.6;
}

/* === Notification Banner === */
.banner {
  border-radius: var(--radius-sm);
  padding: var(--sp-2) var(--sp-3);
  margin-bottom: var(--sp-4);
  font-size: var(--text-sm);
  border: 1px solid;
}

.banner-danger {
  background: var(--grade-fail-bg);
  color: var(--grade-fail);
  border-color: rgba(196, 80, 64, 0.2);
}

/* === Modal === */
/* Fade-out transition for deleted study rows. */
.study-row-fading {
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 400ms ease, transform 400ms ease;
  pointer-events: none;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: var(--surface-raised);
  border: 1px solid var(--border-emphasis);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  width: 400px;
  max-width: calc(100vw - var(--sp-8));
}

.modal-title {
  font-size: var(--text-md);
  font-weight: 600;
  margin-bottom: var(--sp-3);
}

.modal-body {
  font-size: var(--text-sm);
  color: var(--ink-secondary);
  margin-bottom: var(--sp-4);
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  gap: var(--sp-2);
  justify-content: flex-end;
}

/* === Stat Card Accents === */
.stat-card {
  position: relative;
  overflow: hidden;
}

.stat-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.stat-card-link:hover {
  transform: translateY(-2px);
  border-color: var(--ink-tertiary);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
}

.stat-card-pass::before { background: var(--grade-pass); }
.stat-card-marginal::before { background: var(--grade-marginal); }
.stat-card-fail::before { background: var(--grade-fail); }
.stat-card-rejected::before { background: var(--grade-rejected); }

/* === Action Bar (page header right side) === */
.action-bar {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
}

/* === Inline View More button (card headers) === */
.view-more-btn {
  padding: 4px var(--sp-3);
  font-size: var(--text-xs);
}

/* === Page title with inline elements === */
.page-title-inline {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

/* === Timestamp cells === */
.cell-meta {
  color: var(--ink-tertiary);
  font-size: var(--text-xs);
}

/* === Assertion checks === */
.assertion {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
  font-size: var(--text-sm);
}

.assertion-icon {
  font-family: var(--font-data);
  flex-shrink: 0;
}

.assertion-pass .assertion-icon { color: var(--grade-pass); }
.assertion-fail .assertion-icon { color: var(--grade-fail); }
.assertion-fail .assertion-label { color: var(--grade-fail); }
.assertion-pass .assertion-label { color: var(--ink-secondary); }

/* === Persona card === */
.persona-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* === Chart footer (metadata below charts) === */
.chart-footer {
  display: flex;
  gap: var(--sp-4);
  margin-top: var(--sp-2);
  font-size: var(--text-xs);
  color: var(--ink-tertiary);
}

/* === Toggle Group === */
.toggle-group {
  display: inline-flex;
  gap: 1px;
  background: var(--border-default);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.toggle-btn {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border: none;
  background: var(--surface-card);
  color: var(--ink-tertiary);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.toggle-btn:hover {
  color: var(--ink-secondary);
  background: var(--surface-raised);
}

.toggle-btn.active {
  color: var(--ink-primary);
  background: var(--surface-raised);
}

/* === Score Hero (large composite score) === */
.score-hero {
  font-family: var(--font-data);
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: var(--sp-2) 0;
  line-height: 1.1;
}

/* === Section spacing === */
.mb-4 { margin-bottom: var(--sp-4); }
.mb-6 { margin-bottom: var(--sp-6); }

/* === Gradient text utility === */
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === Table toolbar (search + filter row above a table) === */
.table-toolbar {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

/* === Search input === */
.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-wrap svg {
  position: absolute;
  left: 9px;
  width: 14px;
  height: 14px;
  color: var(--ink-tertiary);
  pointer-events: none;
  flex-shrink: 0;
}

.search-input {
  padding: 7px var(--sp-3) 7px 30px;
  background: var(--surface-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--ink-primary);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  width: 240px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 2px var(--border-focus);
}

.search-input::placeholder {
  color: var(--ink-muted);
}

/* === Filter tabs (grade filter row) === */
.filter-tabs {
  display: flex;
  gap: 2px;
  background: var(--surface-input);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.filter-tab {
  padding: 5px var(--sp-3);
  border: none;
  background: transparent;
  color: var(--ink-tertiary);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: 3px;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.filter-tab.active {
  background: var(--gradient);
  color: #fff;
  font-weight: 600;
}

.filter-tab:hover:not(.active) {
  color: var(--ink-secondary);
  background: rgba(255, 255, 255, 0.05);
}

/* === About / Setup page === */
.about-brand {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-lead {
  color: var(--ink-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--sp-6);
}

.about-dimensions {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-3);
}

@media (max-width: 1100px) {
  .about-dimensions { grid-template-columns: repeat(3, 1fr); }
}

.about-dim {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: var(--sp-3);
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
}

.about-dim-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--ink-primary);
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-dim-desc {
  font-size: 11px;
  color: var(--ink-tertiary);
  line-height: 1.5;
}

.about-generator {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
  padding-top: var(--sp-4);
}

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

.about-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}

.about-field-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--ink-secondary);
  margin-bottom: var(--sp-1);
  letter-spacing: 0.03em;
}

.about-field-optional {
  font-weight: 400;
  text-transform: none;
  color: var(--ink-tertiary);
  letter-spacing: 0;
}

.about-field-hint {
  font-size: var(--text-sm);
  color: var(--ink-secondary);
  line-height: 1.5;
  margin-bottom: var(--sp-2);
}

.about-input-short {
  max-width: 120px;
}

.about-platform-hints {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
}

.about-platform-hint {
  font-size: 11px;
  font-family: var(--font-data);
  color: var(--ink-tertiary);
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: 3px;
  padding: 2px 6px;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.about-platform-hint:hover {
  color: var(--ink-secondary);
  border-color: var(--border-emphasis);
}

.about-output {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.about-output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-1);
}

.about-code {
  flex: 1;
  background: var(--surface-input, #080b10);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--sp-4);
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--ink-secondary);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 90px;
}

.about-placement-note {
  display: flex;
  gap: var(--sp-2);
  align-items: flex-start;
  font-size: 11px;
  color: var(--ink-tertiary);
  line-height: 1.6;
  padding: var(--sp-3);
  background: var(--surface-raised);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
}

.about-placement-note code {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--ink-secondary);
  background: var(--surface-card);
  padding: 0 3px;
  border-radius: 2px;
}

/* === Responsive === */
@media (max-width: 900px) {
  .sidebar { display: none; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}