/* IPLT Design System CSS (03_UXUI.md §3.2 ~ §3.5) */
:root {
  --bg-canvas: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-subtle: #F1F5F9;
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --border-default: #E2E8F0;
  --brand-primary: #1D4ED8;
  --brand-hover: #1E40AF;
  --status-confirmed-bg: #DCFCE7;
  --status-confirmed-fg: #166534;
  --status-pending-bg: #FEF3C7;
  --status-pending-fg: #92400E;
  --status-danger-bg: #FEE2E2;
  --status-danger-fg: #991B1B;
  --status-unknown-bg: #E2E8F0;
  --status-unknown-fg: #334155;
  --tier-private-bg: #EDE9FE;
  --tier-private-fg: #5B21B6;
  --tier-shared-bg: #E0F2FE;
  --tier-shared-fg: #075985;
}

[data-theme="dark"] {
  --bg-canvas: #0B1120;
  --bg-surface: #1E293B;
  --bg-subtle: #0F172A;
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --border-default: #334155;
  --brand-primary: #3B82F6;
  --brand-hover: #60A5FA;
  --status-confirmed-bg: #14532D;
  --status-confirmed-fg: #BBF7D0;
  --status-pending-bg: #78350F;
  --status-pending-fg: #FDE68A;
  --status-danger-bg: #7F1D1D;
  --status-danger-fg: #FECACA;
  --status-unknown-bg: #334155;
  --status-unknown-fg: #E2E8F0;
  --tier-private-bg: #4C1D95;
  --tier-private-fg: #DDD6FE;
  --tier-shared-bg: #0C4A6E;
  --tier-shared-fg: #BAE6FD;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Pretendard", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-canvas);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
  word-break: keep-all;
}
.mono {
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-variant-numeric: tabular-nums;
}
.num {
  font-variant-numeric: tabular-nums;
}
.app-shell {
  display: flex;
  min-height: 100vh;
}
.sidebar {
  width: 250px;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-default);
  padding: 1rem;
  flex-shrink: 0;
}
.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.topbar {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-default);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.content-wrap {
  padding: 1.5rem;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
}
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border-default);
  text-align: left;
  vertical-align: top;
}
th {
  background: var(--bg-subtle);
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.55rem;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}
.chip-confirmed { background: var(--status-confirmed-bg); color: var(--status-confirmed-fg); }
.chip-pending { background: var(--status-pending-bg); color: var(--status-pending-fg); }
.chip-danger { background: var(--status-danger-bg); color: var(--status-danger-fg); }
.chip-unknown { background: var(--status-unknown-bg); color: var(--status-unknown-fg); }
.chip-private { background: var(--tier-private-bg); color: var(--tier-private-fg); }
.chip-shared { background: var(--tier-shared-bg); color: var(--tier-shared-fg); }
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.45rem 0.9rem;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  word-break: keep-all;
  flex-shrink: 0;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }
.sidebar nav .btn {
  white-space: normal;
  text-align: left;
  min-height: 36px;
  padding: 0.4rem 0.7rem;
  font-size: 12.5px;
  border-color: transparent;
}
.sidebar nav .btn.nav-active {
  background: var(--tier-shared-bg);
  color: var(--brand-primary);
  border-color: var(--brand-primary);
  font-weight: 700;
}
.sidebar nav .btn.btn-primary.nav-active {
  background: var(--brand-primary);
  color: #FFFFFF;
}
.btn-primary {
  background: var(--brand-primary);
  color: #FFFFFF;
  border-color: var(--brand-primary);
}
.btn-danger {
  background: #DC2626;
  color: #FFFFFF;
  border-color: #DC2626;
}
input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="url"], input[type="date"], select, textarea {
  width: 100%;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background: var(--bg-surface);
  color: var(--text-primary);
  font-size: 13px;
}
.alert-banner {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  border-left: 4px solid var(--brand-primary);
  background: var(--bg-subtle);
}
.qa-floating-bar {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 999;
  display: flex;
  gap: 0.5rem;
  background: #1E1B4B;
  color: #FFFFFF;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  align-items: center;
}


/* Responsive layout and keyboard accessibility. */
.main-area, .grid > *, .search-filters > * { min-width: 0; }
.card { overflow-x: auto; }
.content-wrap { padding-bottom: 5rem; }
.search-filters { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr auto; gap: .5rem; align-items: end; }
:focus-visible { outline: 3px solid var(--brand-primary); outline-offset: 3px; }
.btn { min-height: 44px; }
.btn:hover { background: var(--bg-subtle); }
.btn-primary:hover { background: var(--brand-hover); }
.skip-link { position: fixed; top: -100px; left: 1rem; z-index: 1000; padding: .75rem; background: var(--bg-surface); }
.skip-link:focus { top: 1rem; }
.mobile-bottom-nav { display: none; }
/* Desktop workspace: keep navigation and header visible while reading long pages. */
@media (min-width: 901px) {
  body { overflow: hidden; }
  .app-shell { height: 100vh; height: 100dvh; min-height: 0; overflow: hidden; }
  .sidebar { min-height: 0; overflow-y: auto; overscroll-behavior-y: contain; scrollbar-gutter: stable; }
  .main-area { min-height: 0; overflow: hidden; }
  .topbar { flex-shrink: 0; }
  .topbar > div { min-width: 0; overflow-wrap: anywhere; }
  .topbar > div:last-child { flex-wrap: wrap; }
  .content-wrap { flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior-y: contain; scrollbar-gutter: stable; }
}
@media (max-width: 900px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; border-right: 0; border-bottom: 1px solid var(--border-default); }
  .sidebar nav { max-height: 220px; overflow-y: auto; }
  .topbar { flex-wrap: wrap; padding: 1rem; position: sticky; top: 0; z-index: 20; }
  .content-wrap { padding: 1rem 1rem 7rem; }
  .grid-2, .grid-3, .grid-4, .search-filters { grid-template-columns: minmax(0, 1fr); }
  input, select, textarea { max-width: 100%; font-size: 16px !important; }
  form { flex-wrap: wrap; }
  .qa-floating-bar { left: 8px; right: 8px; bottom: 60px; flex-wrap: wrap; border-radius: 8px; }
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 998;
    background: var(--bg-surface);
    border-top: 1px solid var(--border-default);
    justify-content: space-around;
    align-items: center;
    padding: 0.25rem 0 max(0.25rem, env(safe-area-inset-bottom));
  }
  .mobile-tab-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.25rem 0.5rem;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
  }
}

/* Priority 2 & 3 UX/UI Enhancements: Visual Meters, Diff-Only Toggle & Command Palette */
.header-wrap-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.timeline-step {
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border-default);
  border-top: 3px solid var(--status-unknown-fg);
  border-radius: 6px;
  background: var(--bg-surface);
}
.timeline-step.is-known {
  border-top-color: var(--brand-primary);
}
.timeline-step.is-critical {
  border-top-color: #DC2626;
}
.meter-track {
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: var(--bg-subtle);
  overflow: hidden;
  border: 1px solid var(--border-default);
}
.meter-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--brand-primary);
  transition: width 0.25s ease;
}
.meter-fill.is-warn { background: #D97706; }
.meter-fill.is-danger { background: #DC2626; }
.meter-fill.is-ok { background: #16A34A; }
.is-diff-hidden { display: none !important; }
.kbd-hint {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  border: 1px solid var(--border-default);
  background: var(--bg-subtle);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--text-secondary);
}
.cmd-palette-backdrop {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(2px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
}
.cmd-palette-backdrop.is-open { display: flex; }
.cmd-palette-dialog {
  width: min(600px, 92vw);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: 10px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}
.cmd-palette-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.cmd-palette-input {
  border: 0 !important;
  outline: none !important;
  background: transparent !important;
  font-size: 15px !important;
  padding: 0.25rem 0 !important;
}
.cmd-palette-list {
  max-height: 360px;
  overflow-y: auto;
  padding: 0.4rem;
}
.cmd-palette-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55rem 0.75rem;
  border-radius: 6px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 13px;
}
.cmd-palette-item:hover,
.cmd-palette-item.is-selected {
  background: var(--bg-subtle);
  color: var(--brand-primary);
}
.cmd-palette-item.is-hidden { display: none; }

/* User Manual Tabbed Popup Modal */
.manual-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 2100;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.manual-modal-backdrop.is-open { display: flex; }
.manual-modal-dialog {
  width: min(960px, 96vw);
  max-height: 86vh;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: 12px;
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.manual-modal-header {
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border-default);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.manual-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.65rem 1.25rem;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-default);
}
.manual-tab-btn {
  padding: 0.38rem 0.72rem;
  border-radius: 6px;
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.manual-tab-btn:hover { color: var(--text-primary); border-color: var(--brand-primary); }
.manual-tab-btn.is-active {
  background: var(--brand-primary);
  color: #FFFFFF;
  border-color: var(--brand-primary);
}
.manual-modal-body {
  padding: 1.25rem;
  overflow-y: auto;
  flex: 1;
}
.manual-panel { display: none; }
.manual-panel.is-active { display: block; }
.manual-panel h4 { margin-top: 0; margin-bottom: 0.6rem; font-size: 16px; }
.manual-panel ul, .manual-panel ol { margin: 0.4rem 0 0.85rem 1.25rem; padding: 0; }
.manual-panel li { margin-bottom: 0.35rem; }