/* ==========================================================================
   Meridian — Precision Task Ledger
   Design System: Swiss Horological Dispatch Ledger (Operate Mode)
   ========================================================================== */

:root,
[data-theme="light"] {
  /* Surface Palette — Cool Mineral Slate & Blueprint Porcelain */
  --bg-canvas: #EEF2F6;
  --bg-surface: #F8FAFC;
  --bg-surface-elevated: #FFFFFF;
  --bg-rail: #E2E8F0;
  --bg-subtle: #F1F5F9;
  --bg-hover: #E6ECF4;
  --bg-active: #DAE2EE;

  /* Structural Hairlines */
  --border-hairline: #CBD5E1;
  --border-strong: #94A3B8;
  --border-focus: #1D4ED8;

  /* Ink Hierarchy (All tinted cool slate, WCAG AA/AAA verified) */
  --text-primary: #0F172A;     /* 16.8:1 on surface */
  --text-secondary: #334155;   /* 9.6:1 on surface */
  --text-muted: #475569;       /* 6.9:1 on surface (used for placeholders & metadata) */
  --text-on-accent: #FFFFFF;

  /* Committed Primary Accent — International Cobalt Blue */
  --accent-primary: #1D4ED8;
  --accent-primary-hover: #1E40AF;
  --accent-primary-active: #1E3A8A;
  --accent-ink-on-soft: #1E3A8A; /* 8.8:1 on --accent-soft */
  --accent-soft: #DBEAFE;
  --accent-border: #93C5FD;

  /* Semantic State Tokens */
  --priority-high-ink: #991B1B;
  --priority-high-bg: #FEE2E2;
  --priority-high-border: #FCA5A5;
  --priority-high-bar: #DC2626;

  --priority-med-ink: #92400E;
  --priority-med-bg: #FEF3C7;
  --priority-med-border: #FCD34D;
  --priority-med-bar: #D97706;

  --priority-low-ink: #115E59;
  --priority-low-bg: #CCFBF1;
  --priority-low-border: #5EEAD4;
  --priority-low-bar: #0D9488;

  --state-done-ink: #166534;
  --state-done-bg: #DCFCE7;
  --state-done-border: #86EFAC;
  --state-done-bar: #16A34A;

  --danger-ink: #991B1B;
  --danger-bg: #FEF2F2;
  --danger-border: #FECACA;

  /* Elevation & Depth (Offset + soft blur, never 0-offset halo) */
  --shadow-sheet: 0 2px 6px -1px rgba(15, 23, 42, 0.05), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
  --shadow-toast: 0 10px 24px -4px rgba(15, 23, 42, 0.18), 0 4px 8px -2px rgba(15, 23, 42, 0.08);

  /* Typography — System Grotesque Stack + Tabular Numerals */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Fixed Product Type Scale (1.15 ratio) */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px — mandatory floor for mobile inputs */
  --text-md: 1.125rem;    /* 18px */
  --text-lg: 1.25rem;     /* 20px */
  --text-xl: 1.5rem;      /* 24px */

  /* Radius & Motion */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --ease-out-expo: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 120ms;
  --duration-normal: 200ms;
}

[data-theme="dark"] {
  /* Surface Palette — Deep Naval Graphite & Crisp Slate */
  --bg-canvas: #0B0F17;
  --bg-surface: #111827;
  --bg-surface-elevated: #1E293B;
  --bg-rail: #172033;
  --bg-subtle: #0F1523;
  --bg-hover: #1E293B;
  --bg-active: #283548;

  /* Structural Hairlines */
  --border-hairline: #283548;
  --border-strong: #475569;
  --border-focus: #60A5FA;

  /* Ink Hierarchy (Tinted cool slate, WCAG AA/AAA verified) */
  --text-primary: #F1F5F9;     /* 15.8:1 on surface */
  --text-secondary: #CBD5E1;   /* 11.2:1 on surface */
  --text-muted: #94A3B8;       /* 6.1:1 on surface */
  --text-on-accent: #FFFFFF;

  /* Committed Primary Accent */
  --accent-primary: #2563EB;
  --accent-primary-hover: #3B82F6;
  --accent-primary-active: #1D4ED8;
  --accent-ink-on-soft: #BFDBFE; /* 9.4:1 on --accent-soft */
  --accent-soft: #172554;
  --accent-border: #1E40AF;

  /* Semantic State Tokens */
  --priority-high-ink: #FECACA;
  --priority-high-bg: #311013;
  --priority-high-border: #7F1D1D;
  --priority-high-bar: #EF4444;

  --priority-med-ink: #FDE68A;
  --priority-med-bg: #2E1C09;
  --priority-med-border: #78350F;
  --priority-med-bar: #F59E0B;

  --priority-low-ink: #99F6E4;
  --priority-low-bg: #0D2926;
  --priority-low-border: #115E59;
  --priority-low-bar: #14B8A6;

  --state-done-ink: #BBF7D0;
  --state-done-bg: #0D2818;
  --state-done-border: #166534;
  --state-done-bar: #22C55E;

  --danger-ink: #FECACA;
  --danger-bg: #311013;
  --danger-border: #7F1D1D;

  --shadow-sheet: 0 2px 8px -1px rgba(0, 0, 0, 0.4), 0 1px 3px -1px rgba(0, 0, 0, 0.3);
  --shadow-toast: 0 12px 28px -4px rgba(0, 0, 0, 0.65), 0 4px 10px -2px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   Platform Baseline & Browser Surface Theming
   ========================================================================== */

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior: none;
  caret-color: var(--accent-primary);
  scrollbar-color: var(--border-strong) var(--bg-canvas);
  scrollbar-width: thin;
}

body {
  min-height: 100dvh;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--duration-normal) var(--ease-out-expo),
              color var(--duration-normal) var(--ease-out-expo);
}

/* Custom Browser Surfaces (Selection, Scrollbars, Focus Rings, Underline) */
::selection {
  background-color: var(--accent-soft);
  color: var(--accent-ink-on-soft);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-canvas);
}

::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 4px;
}

:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

a {
  color: var(--accent-primary);
  text-underline-offset: 3px;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

/* Mobile-Native Control Rules */
button,
[role="button"],
[role="tab"],
.chip-btn,
.checkbox-btn {
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  font-family: inherit;
  cursor: pointer;
}

/* Prevent iOS Safari input auto-zoom by enforcing >= 16px (1rem) */
input,
textarea,
select {
  font-family: inherit;
  font-size: var(--text-base);
  color: var(--text-primary);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

[hidden] {
  display: none !important;
}

/* ==========================================================================
   App Shell & Top Operational Bar
   ========================================================================== */

.app-shell {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding-bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px));
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-hairline);
  padding-top: env(safe-area-inset-top, 0px);
}

.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  min-width: 0;
}

.brand-title {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-md);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text-primary);
}

.brand-glyph {
  color: var(--accent-primary);
  flex-shrink: 0;
}

.brand-divider {
  width: 1px;
  height: 16px;
  background-color: var(--border-hairline);
  display: none;
}

.live-date {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
  display: none;
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}

.completion-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border-radius: 999px;
  background-color: var(--bg-rail);
  border: 1px solid var(--border-hairline);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  transition: background-color var(--duration-normal) var(--ease-out-expo);
}

.status-dot.is-all-done {
  background-color: var(--state-done-bar);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-hairline);
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  transition: transform var(--duration-fast) ease-out,
              background-color var(--duration-fast) ease-out,
              border-color var(--duration-fast) ease-out;
}

.icon-btn:active {
  transform: scale(0.95);
  background-color: var(--bg-active);
}

[data-theme="light"] .icon-moon {
  display: block;
}
[data-theme="light"] .icon-sun {
  display: none;
}
[data-theme="dark"] .icon-moon {
  display: none;
}
[data-theme="dark"] .icon-sun {
  display: block;
}

/* ==========================================================================
   Workspace Container & Signature Calibrated Horizon Rail
   ========================================================================== */

.workspace {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  flex: 1;
}

.horizon-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 0.875rem 1rem;
  box-shadow: var(--shadow-sheet);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.horizon-header {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.horizon-summary {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.horizon-title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text-primary);
}

.horizon-subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  max-width: 68ch;
}

.horizon-metrics {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.625rem 0.875rem;
  background-color: var(--bg-rail);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
}

.metric-item {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  flex: 1;
}

.metric-value {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
}

.metric-urgent {
  color: var(--priority-high-ink);
}

.metric-done {
  color: var(--state-done-ink);
}

.metric-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
}

.metric-sep {
  width: 1px;
  height: 28px;
  background-color: var(--border-hairline);
}

/* Calibrated Rail */
.calibrated-rail-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.calibrated-rail {
  height: 12px;
  width: 100%;
  background-color: var(--bg-rail);
  border: 1px solid var(--border-hairline);
  border-radius: 999px;
  overflow: hidden;
  display: flex;
}

.rail-seg {
  height: 100%;
  transition: width 240ms var(--ease-out-expo);
}

.rail-seg-done {
  background-color: var(--state-done-bar);
}

.rail-seg-high {
  background-color: var(--priority-high-bar);
}

.rail-seg-medium {
  background-color: var(--priority-med-bar);
}

.rail-seg-low {
  background-color: var(--priority-low-bar);
}

.rail-ticks {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.rail-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  padding-top: 0.125rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.legend-swatch {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
}

.swatch-done { background-color: var(--state-done-bar); }
.swatch-high { background-color: var(--priority-high-bar); }
.swatch-medium { background-color: var(--priority-med-bar); }
.swatch-low { background-color: var(--priority-low-bar); }

/* ==========================================================================
   Main Grid: Composer + Task Ledger
   ========================================================================== */

.workspace-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  align-items: start;
}

/* Composer Card */
.composer-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 0.875rem 1rem;
  box-shadow: var(--shadow-sheet);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.composer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-hairline);
}

.composer-heading {
  font-size: var(--text-md);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text-primary);
}

.shortcut-hint {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 22px;
  padding: 0 0.375rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  background-color: var(--bg-rail);
  border: 1px solid var(--border-hairline);
  border-radius: 4px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.field-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.optional-tag {
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--text-muted);
}

.text-input,
.textarea-input,
.select-input,
.date-input,
.search-input {
  width: 100%;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: var(--text-base); /* 16px mobile floor */
  line-height: 1.35;
  color: var(--text-primary);
  transition: border-color var(--duration-fast) ease-out,
              box-shadow var(--duration-fast) ease-out;
}

.textarea-input {
  resize: vertical;
  min-height: 42px;
}

.text-input:focus,
.textarea-input:focus,
.select-input:focus,
.date-input:focus,
.search-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.text-input.has-error {
  border-color: var(--danger-ink);
  background-color: var(--danger-bg);
}

.field-error {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--danger-ink);
  margin-top: 0.125rem;
}

.select-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.select-input {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 2.25rem;
  cursor: pointer;
}

.select-chevron {
  position: absolute;
  right: 0.75rem;
  pointer-events: none;
  color: var(--text-secondary);
}

.date-quick-row {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.quick-date-chips {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
}

.chip-btn {
  padding: 0.375rem 0.625rem;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-hairline);
  background-color: var(--bg-rail);
  color: var(--text-secondary);
  transition: transform var(--duration-fast) ease-out,
              background-color var(--duration-fast) ease-out,
              color var(--duration-fast) ease-out;
}

.chip-btn:active {
  transform: scale(0.96);
}

.chip-btn.is-selected {
  background-color: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent-ink-on-soft);
}

.primary-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  min-height: 44px;
  padding: 0.6875rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background-color: var(--accent-primary);
  color: var(--text-on-accent);
  font-size: var(--text-base);
  font-weight: 600;
  transition: transform var(--duration-fast) ease-out,
              background-color var(--duration-fast) ease-out;
}

.primary-submit-btn:active {
  transform: scale(0.98);
  background-color: var(--accent-primary-active);
}

/* ==========================================================================
   Ledger Column, Toolbar & Filters
   ========================================================================== */

.ledger-column {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  min-width: 0;
}

.ledger-toolbar {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 0.75rem;
  box-shadow: var(--shadow-sheet);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.filter-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.25rem;
  background-color: var(--bg-rail);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-hairline);
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  min-height: 38px;
  padding: 0.375rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: transform var(--duration-fast) ease-out,
              background-color var(--duration-fast) ease-out,
              color var(--duration-fast) ease-out;
}

.filter-tab:active {
  transform: scale(0.97);
}

.filter-tab.is-active {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-hairline);
  box-shadow: var(--shadow-sheet);
}

.tab-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 18px;
  padding: 0 0.375rem;
  border-radius: 999px;
  font-size: var(--text-xs);
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
}

.filter-tab.is-active .tab-badge {
  background-color: var(--accent-soft);
  color: var(--accent-ink-on-soft);
}

.toolbar-secondary {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  padding-left: 2.25rem;
  padding-right: 2.25rem;
}

/* Hide native webkit search cancel button in favor of accessible custom button */
.search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}

.clear-search-btn {
  position: absolute;
  right: 0.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
}

.clear-search-btn:active {
  transform: scale(0.92);
}

.toolbar-Dropdowns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.select-compact .select-input {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

/* ==========================================================================
   Ledger Sheet & Task Items
   ========================================================================== */

.ledger-sheet {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sheet);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.task-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.task-item {
  border-bottom: 1px solid var(--border-hairline);
  background-color: var(--bg-surface);
  transition: background-color var(--duration-fast) ease-out;
}

.task-item:last-child {
  border-bottom: none;
}

.task-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem;
}

.task-main {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  flex: 1;
  min-width: 0;
}

/* Custom Accessible Checkbox Button */
.checkbox-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-top: 0.125rem;
  border-radius: 6px;
  border: 1.75px solid var(--border-strong);
  background-color: var(--bg-surface-elevated);
  color: var(--text-on-accent);
  flex-shrink: 0;
  transition: transform var(--duration-fast) ease-out,
              background-color var(--duration-fast) ease-out,
              border-color var(--duration-fast) ease-out;
}

.checkbox-btn:active {
  transform: scale(0.9);
}

.checkbox-btn[aria-checked="true"] {
  background-color: var(--state-done-bar);
  border-color: var(--state-done-bar);
}

.checkbox-icon {
  opacity: 0;
  transform: scale(0.6);
  transition: opacity var(--duration-fast) ease-out,
              transform var(--duration-fast) var(--ease-out-expo);
}

.checkbox-btn[aria-checked="true"] .checkbox-icon {
  opacity: 1;
  transform: scale(1);
}

.task-body {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  flex: 1;
  min-width: 0;
}

.task-title-line {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.task-title {
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  word-break: break-word;
  transition: color var(--duration-fast) ease-out;
}

.task-item.is-completed .task-title {
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
  color: var(--text-muted);
}

.task-notes {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.45;
  max-width: 68ch;
  word-break: break-word;
  white-space: pre-wrap;
}

.task-item.is-completed .task-notes {
  color: var(--text-muted);
}

/* Task Metadata Badges */
.task-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.125rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.1875rem 0.5rem;
  border-radius: 4px;
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: 1.2;
  border: 1px solid transparent;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.badge-priority-high {
  background-color: var(--priority-high-bg);
  color: var(--priority-high-ink);
  border-color: var(--priority-high-border);
}
.badge-priority-high .badge-dot {
  background-color: var(--priority-high-bar);
}

.badge-priority-medium {
  background-color: var(--priority-med-bg);
  color: var(--priority-med-ink);
  border-color: var(--priority-med-border);
}
.badge-priority-medium .badge-dot {
  background-color: var(--priority-med-bar);
}

.badge-priority-low {
  background-color: var(--priority-low-bg);
  color: var(--priority-low-ink);
  border-color: var(--priority-low-border);
}
.badge-priority-low .badge-dot {
  background-color: var(--priority-low-bar);
}

.badge-category {
  background-color: var(--bg-rail);
  color: var(--text-secondary);
  border-color: var(--border-hairline);
}

.badge-due {
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border-color: var(--border-hairline);
  font-variant-numeric: tabular-nums;
}

.badge-due.is-overdue {
  background-color: var(--danger-bg);
  color: var(--danger-ink);
  border-color: var(--danger-border);
}

/* Task Actions — Deliberate Spatial Separation for Destructive Control */
.task-actions {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  flex-shrink: 0;
}

.action-sep {
  width: 1px;
  height: 20px;
  background-color: var(--border-hairline);
  margin: 0 0.25rem;
}

.row-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-hairline);
  background-color: var(--bg-surface-elevated);
  color: var(--text-secondary);
  transition: transform var(--duration-fast) ease-out,
              background-color var(--duration-fast) ease-out,
              color var(--duration-fast) ease-out,
              border-color var(--duration-fast) ease-out;
}

.row-action-btn:active {
  transform: scale(0.94);
}

.row-action-delete {
  color: var(--danger-ink);
  border-color: var(--border-hairline);
}

/* ==========================================================================
   Inline Task Editor (No Modal Interruption)
   ========================================================================== */

.inline-editor {
  padding: 1rem;
  background-color: var(--bg-subtle);
  border-top: 1px dashed var(--border-hairline);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.inline-editor-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.625rem;
}

.inline-editor-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.625rem;
}

.inline-editor-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  padding-top: 0.25rem;
}

.secondary-btn,
.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  min-height: 38px;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: transform var(--duration-fast) ease-out,
              background-color var(--duration-fast) ease-out;
}

.secondary-btn {
  background-color: var(--accent-primary);
  color: var(--text-on-accent);
  border: 1px solid transparent;
}

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

.ghost-btn {
  background-color: var(--bg-surface-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-hairline);
}

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

/* ==========================================================================
   Empty States & Ledger Footer
   ========================================================================== */

.empty-state {
  padding: 3rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
}

.empty-glyph {
  color: var(--accent-primary);
  margin-bottom: 0.25rem;
}

.empty-title {
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--text-primary);
}

.empty-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  max-width: 46ch;
  line-height: 1.5;
}

.empty-actions,
.empty-filter-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  margin-top: 0.5rem;
}

.ledger-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-rail);
  border-top: 1px solid var(--border-hairline);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.footer-summary {
  font-weight: 600;
}

.footer-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.text-action-btn {
  background: transparent;
  border: none;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0.25rem 0.375rem;
  border-radius: 4px;
  transition: transform var(--duration-fast) ease-out,
              color var(--duration-fast) ease-out,
              background-color var(--duration-fast) ease-out;
}

.text-action-btn:active {
  transform: scale(0.96);
}

.text-action-danger {
  color: var(--danger-ink);
}

/* ==========================================================================
   Undo Toast (Forgiveness Layer)
   ========================================================================== */

.toast-region {
  position: fixed;
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  width: calc(100% - 2rem);
  max-width: 420px;
  pointer-events: none;
}

.undo-toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background-color: var(--text-primary);
  color: var(--bg-surface);
  box-shadow: var(--shadow-toast);
  font-size: var(--text-sm);
  font-weight: 500;
}

.toast-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.toast-undo-btn {
  padding: 0.3125rem 0.625rem;
  border-radius: 4px;
  border: none;
  background-color: var(--accent-primary);
  color: #FCFBF9;
  font-size: var(--text-xs);
  font-weight: 700;
}

.toast-undo-btn:active {
  transform: scale(0.95);
}

.toast-dismiss-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: inherit;
  opacity: 0.8;
}

/* ==========================================================================
   Capability-Gated Hover States (Mobile-Native Rule #1)
   ========================================================================== */

@media (hover: hover) and (pointer: fine) {
  .icon-btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-strong);
  }

  .chip-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
  }

  .chip-btn.is-selected:hover {
    background-color: var(--accent-soft);
  }

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

  .filter-tab:not(.is-active):hover {
    color: var(--text-primary);
    background-color: var(--bg-hover);
  }

  .clear-search-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
  }

  .task-item:hover {
    background-color: var(--bg-subtle);
  }

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

  .row-action-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-strong);
  }

  .row-action-delete:hover {
    background-color: var(--danger-bg);
    color: var(--danger-ink);
    border-color: var(--danger-border);
  }

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

  .ghost-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
  }

  .text-action-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
  }

  .text-action-danger:hover {
    background-color: var(--danger-bg);
    color: var(--danger-ink);
  }
}

/* ==========================================================================
   Responsive Breakpoints (Mobile-First -> Tablet -> Desktop)
   ========================================================================== */

@media (max-width: 639px) {
  .topbar-inner {
    padding: 0.5rem 0.875rem;
  }

  .workspace {
    padding: 0.625rem 0.75rem;
    gap: 0.625rem;
  }

  .horizon-panel {
    padding: 0.625rem 0.875rem;
    gap: 0.5rem;
  }

  .horizon-subtitle,
  .rail-ticks {
    display: none;
  }

  .horizon-metrics {
    padding: 0.375rem 0.625rem;
    gap: 0.625rem;
  }

  .metric-value {
    font-size: var(--text-base);
  }

  .composer-card {
    padding: 0.75rem 0.875rem;
    gap: 0.5rem;
  }

  .composer-header {
    padding-bottom: 0.375rem;
  }

  .field-group {
    gap: 0.25rem;
  }

  .field-label {
    font-size: var(--text-xs);
  }

  .text-input,
  .textarea-input,
  .select-input,
  .date-input,
  .search-input {
    padding-top: 0.375rem;
    padding-bottom: 0.375rem;
  }

  .textarea-input {
    min-height: 36px;
  }

  .primary-submit-btn {
    min-height: 40px;
    padding: 0.5rem 0.875rem;
  }
}

@media (min-width: 640px) {
  .brand-divider,
  .live-date {
    display: inline-block;
  }

  .horizon-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .horizon-metrics {
    min-width: 320px;
  }

  .toolbar-secondary {
    flex-direction: row;
    align-items: center;
  }

  .toolbar-Dropdowns {
    display: flex;
    flex-shrink: 0;
  }

  .inline-editor-meta {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 960px) {
  .topbar-inner,
  .workspace {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .workspace {
    padding-top: 1.5rem;
    gap: 1.5rem;
  }

  .workspace-grid {
    grid-template-columns: 360px 1fr;
    gap: 1.5rem;
  }

  .composer-column {
    position: sticky;
    top: 4.5rem;
  }

  .shortcut-hint {
    display: inline-flex;
  }
}

/* ==========================================================================
   Reduced Motion & Accessibility Overrides
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}