/* ============================================================================
   FirmClock — Conceptual product interface
   ----------------------------------------------------------------------------
   Every visual in this file is an ILLUSTRATION of an interface concept, not a
   screenshot and not a working product. All names, figures and dates are
   fictional. When real product screenshots exist, the `.ui-*` blocks can be
   replaced with images inside the same frames without touching page layout.
   ========================================================================= */

.ui {
  --ui-radius: 10px;
  position: relative;
  background: var(--paper-000);
  border: 1px solid var(--line-soft);
  border-radius: var(--ui-radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  color: var(--ink-900);
  font-size: var(--fs-body-sm);
  container-type: inline-size;
}
.on-ink .ui {
  background: var(--ink-850);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow-inverse);
  color: var(--paper-050);
}
.ui--flat { box-shadow: var(--shadow-md); }
.ui--inset { box-shadow: none; border-color: var(--line-hairline); }

/* --- Window chrome -------------------------------------------------------- */
.ui__chrome {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--line-hairline);
  background: var(--paper-050);
}
.on-ink .ui__chrome { background: var(--ink-800); border-bottom-color: rgba(255, 255, 255, 0.08); }
.ui__dots { display: flex; gap: 5px; }
.ui__dots i {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--paper-300);
  display: block;
}
.on-ink .ui__dots i { background: rgba(255, 255, 255, 0.16); }
.ui__crumb {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-metric);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--ui-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.ui__crumb b { font-weight: 500; color: var(--ink-600); }
.on-ink .ui__crumb b { color: var(--paper-100); }
.ui__crumb span { opacity: 0.5; }
.ui__chrome-end { margin-inline-start: auto; display: flex; align-items: center; gap: var(--s-3); }

.ui-avatar {
  width: 22px; height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent-100);
  color: var(--accent-700);
  font-family: var(--font-metric);
  font-size: 0.5625rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.on-ink .ui-avatar { background: var(--accent-700); color: var(--accent-100); }

/* --- Body layout ---------------------------------------------------------- */
.ui__body { display: grid; grid-template-columns: 168px minmax(0, 1fr); }
.ui__body--norail { grid-template-columns: minmax(0, 1fr); }

.ui-rail {
  border-right: 1px solid var(--line-hairline);
  padding: var(--s-4) var(--s-3);
  background: var(--paper-050);
  display: grid;
  align-content: start;
  gap: 2px;
}
.on-ink .ui-rail { background: var(--ink-900); border-right-color: rgba(255, 255, 255, 0.07); }
.ui-rail__label {
  font-family: var(--font-metric);
  font-size: 0.5625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ui-faint);
  padding: var(--s-3) var(--s-2) var(--s-2);
}
.ui-rail__item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem var(--s-2);
  border-radius: var(--r-sm);
  font-size: 0.8125rem;
  color: var(--ink-500);
  line-height: 1.3;
}
.on-ink .ui-rail__item { color: #93A3A8; }
/* Rail markers are interval brackets, not checkboxes. */
.ui-rail__item i {
  width: 9px; height: 11px;
  flex: none;
  border-left: 1px solid currentColor;
  border-top: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  opacity: 0.5;
}
.ui-rail__item--sub i {
  border: none;
  border-left: 1px solid currentColor;
  height: 9px;
  width: 5px;
}
.ui-rail__item.is-active i { opacity: 0.9; color: var(--accent-600); }
.on-ink .ui-rail__item.is-active i { color: var(--accent-300); }
.ui-rail__item.is-active {
  background: var(--paper-150);
  color: var(--ink-900);
  font-weight: 500;
  box-shadow: inset 2px 0 0 var(--accent-500);
}
.on-ink .ui-rail__item.is-active { background: rgba(255, 255, 255, 0.06); color: var(--paper-050); }
.ui-rail__item .ui-count {
  margin-inline-start: auto;
  font-family: var(--font-metric);
  font-size: 0.625rem;
  color: var(--ui-faint);
}

.ui__main { padding: var(--s-5); display: grid; gap: var(--s-5); min-width: 0; }
.ui__main--tight { padding: var(--s-4); gap: var(--s-4); }

.ui-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-4);
  flex-wrap: wrap;
}
.ui-h {
  font-size: 0.9375rem;
  font-weight: 540;
  letter-spacing: -0.012em;
  color: var(--ink-900);
}
.on-ink .ui-h { color: var(--paper-050); }
.ui-sub {
  font-family: var(--font-metric);
  font-size: 0.625rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ui-faint);
}

/* ============================================================================
   Timer — the running instrument
   ========================================================================= */
.timer {
  display: grid;
  gap: var(--s-4);
  padding: var(--s-5);
  border: 1px solid var(--line-hairline);
  border-radius: var(--r-lg);
  background:
    linear-gradient(180deg, var(--paper-050), var(--paper-000));
}
.on-ink .timer {
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.015));
  border-color: rgba(255, 255, 255, 0.10);
}
.timer__top { display: flex; align-items: center; gap: var(--s-3); flex-wrap: wrap; }
.timer__state {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-metric);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-600);
}
.on-ink .timer__state { color: var(--accent-300); }
.timer__pulse {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}
/* The pulse runs only while the timer is genuinely live and on screen.
   Nothing on this page animates in the background indefinitely. */
.timer.is-live .timer__pulse {
  animation: pulse 2.4s var(--ease-in-out) infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.32; } }
@media (prefers-reduced-motion: reduce) {
  .timer.is-live .timer__pulse { animation: none; }
}

.timer__value {
  font-family: var(--font-metric);
  font-size: clamp(2.25rem, 1.5rem + 2.6vw, 3.25rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
  color: var(--ink-900);
  display: flex;
  align-items: baseline;
  gap: 0.06em;
}
.on-ink .timer__value { color: var(--paper-000); }
.timer__value .sec { color: var(--ui-muted); font-size: 0.55em; letter-spacing: -0.02em; }
.on-ink .timer__value .sec { color: var(--ink-200); }

/* Live measure beneath the timer: the current hour, filling. */
.timer__measure { position: relative; height: 16px; }
.timer__measure .rule { position: absolute; inset: 0; }
.timer__fill {
  position: absolute;
  left: 0; bottom: 0;
  height: 3px;
  background: var(--accent-500);
  width: var(--fill, 34%);
  transition: width 1s linear;
}
.timer__fill::after {
  content: "";
  position: absolute;
  right: -1px; bottom: -3px;
  width: 1px; height: 15px;
  background: var(--accent-600);
}
.on-ink .timer__fill::after { background: var(--accent-300); }

.timer__meta {
  display: flex;
  align-items: center;
  gap: var(--s-3) var(--s-5);
  flex-wrap: wrap;
  font-size: 0.75rem;
  color: var(--ink-500);
}
.on-ink .timer__meta { color: #93A3A8; }
.timer__actions { display: flex; gap: var(--s-2); margin-inline-start: auto; }

.ui-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-soft);
  background: var(--paper-000);
  color: var(--ink-700);
  line-height: 1.2;
}
.on-ink .ui-btn { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.14); color: var(--paper-100); }
.ui-btn--solid { background: var(--ink-900); border-color: var(--ink-900); color: var(--paper-050); }
.on-ink .ui-btn--solid { background: var(--paper-050); border-color: var(--paper-050); color: var(--ink-900); }
.ui-btn--accent { background: var(--accent-600); border-color: var(--accent-600); color: #fff; }
.ui-btn i.sq { width: 8px; height: 8px; background: currentColor; display: block; }
.ui-btn i.tri {
  width: 0; height: 0;
  border-left: 7px solid currentColor;
  border-top: 4.5px solid transparent;
  border-bottom: 4.5px solid transparent;
  display: block;
}

/* --- Selectors: client / engagement --------------------------------------- */
.ui-selects { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-3); }
.ui-select {
  display: grid;
  gap: 0.28rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  background: var(--paper-000);
  min-width: 0;
}
.on-ink .ui-select { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.12); }
.ui-select__label {
  font-family: var(--font-metric);
  font-size: 0.5625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ui-faint);
}
.ui-select__value {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 480;
  color: var(--ink-900);
  min-width: 0;
}
.on-ink .ui-select__value { color: var(--paper-050); }
.ui-select__value span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ui-select__caret {
  margin-inline-start: auto;
  flex: none;
  width: 0; height: 0;
  border-top: 4px solid var(--ink-300);
  border-left: 3.5px solid transparent;
  border-right: 3.5px solid transparent;
}
.ui-code {
  font-family: var(--font-metric);
  font-size: 0.625rem;
  color: var(--ui-muted);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  padding: 0.05rem 0.28rem;
  flex: none;
}
.on-ink .ui-code { color: var(--ink-200); border-color: rgba(255,255,255,0.16); }

/* ============================================================================
   Entry list — today's recorded time
   ========================================================================= */
.ui-entries { display: grid; gap: 1px; background: var(--line-hairline); border-radius: var(--r-sm); overflow: hidden; }
.ui-entry {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr) auto auto;
  align-items: center;
  gap: var(--s-3);
  padding: 0.6rem 0.7rem;
  background: var(--paper-000);
}
.on-ink .ui-entry { background: var(--ink-850); }
.ui-entry__time {
  font-family: var(--font-metric);
  font-size: 0.6875rem;
  color: var(--ui-muted);
  font-variant-numeric: tabular-nums;
}
.ui-entry__body { min-width: 0; display: grid; gap: 0.22rem; }
.ui-entry__title {
  font-size: 0.8125rem;
  font-weight: 480;
  color: var(--ink-900);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.on-ink .ui-entry__title { color: var(--paper-050); }
.ui-entry__meta {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.6875rem;
  color: var(--ui-muted);
  min-width: 0;
}
.ui-entry__meta span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ui-entry__band { width: 96px; }
.ui-entry__dur {
  font-family: var(--font-metric);
  font-size: 0.8125rem;
  color: var(--ink-700);
  font-variant-numeric: tabular-nums;
  text-align: right;
  min-width: 3.4rem;
}
.on-ink .ui-entry__dur { color: var(--paper-100); }
.ui-entry--running { background: var(--accent-050); }
.on-ink .ui-entry--running { background: rgba(14, 114, 104, 0.14); }
.ui-entry--gap { background: color-mix(in srgb, var(--flag-100) 45%, var(--paper-000)); }
.on-ink .ui-entry--gap { background: rgba(180, 85, 31, 0.12); }

.ui-entry--enter { animation: entryIn 520ms var(--ease-out) both; }
@keyframes entryIn {
  from { opacity: 0; transform: translateY(-6px); clip-path: inset(0 0 100% 0); }
  to { opacity: 1; transform: none; clip-path: inset(0 0 0 0); }
}
@media (prefers-reduced-motion: reduce) { .ui-entry--enter { animation: none; } }

/* ============================================================================
   Week strip — weekly progress against target
   ========================================================================= */
.ui-week { display: grid; gap: var(--s-3); }
.ui-week__cols {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  align-items: end;
  height: 92px;
  position: relative;
  margin-top: 1.15rem; /* reserves room for the target label above the line */
}
.ui-week__days {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  margin-top: 0.4rem;
}
.ui-week__target {
  position: absolute;
  left: 0; right: 0;
  bottom: var(--target, 62%);
  border-top: 1px dashed var(--ink-300);
  pointer-events: none;
  z-index: 1;
}
.ui-week__target span {
  position: absolute;
  right: 0; top: -1.05rem;
  font-family: var(--font-metric);
  font-size: 0.5625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ui-faint);
  background: var(--paper-000);
  padding-inline: 3px;
}
.on-ink .ui-week__target span { background: var(--ink-850); }
.ui-week__bar {
  position: relative;
  width: 100%;
  min-height: 3px;
  border-radius: 2px 2px 0 0;
  align-self: end;
  transition: height var(--dur-slow) var(--ease-out);
}
.ui-week__bar--approved { background: var(--accent-500); }
.ui-week__bar--submitted { background: var(--ink-500); }
.ui-week__bar--recorded {
  background: transparent;
  box-shadow: inset 0 0 0 1px var(--ink-300);
}
.ui-week__bar--recorded::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, var(--ink-200) 0 1px, transparent 1px 6px);
  opacity: 0.7;
}
.ui-week__bar--missing {
  background: repeating-linear-gradient(-45deg, var(--flag-500) 0 1px, transparent 1px 5px);
  box-shadow: inset 0 0 0 1px var(--flag-300);
}
.ui-week__bar--approved::before,
.ui-week__bar--submitted::before {
  content: "";
  position: absolute;
  top: -3px; left: 0; right: 0;
  height: 1px;
  background: var(--ink-900);
  opacity: 0.85;
}
.on-ink .ui-week__bar--approved::before,
.on-ink .ui-week__bar--submitted::before { background: var(--paper-100); }
.ui-week__bar--approved::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: var(--accent-800);
}
.ui-week__day {
  font-family: var(--font-metric);
  font-size: 0.5625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ui-muted);
  text-align: center;
}
.ui-week__foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--s-4);
  padding-top: var(--s-3);
  border-top: 1px solid var(--line-hairline);
  font-size: 0.75rem;
  color: var(--ink-500);
}
.on-ink .ui-week__foot { color: #93A3A8; }
.ui-week__total {
  font-family: var(--font-metric);
  font-size: 1rem;
  color: var(--ink-900);
  font-variant-numeric: tabular-nums;
}
.on-ink .ui-week__total { color: var(--paper-050); }

/* ============================================================================
   Firm activity signal — calm, low-frequency
   ========================================================================= */
.ui-signal {
  display: grid;
  gap: var(--s-3);
  padding: var(--s-4);
  border: 1px solid var(--line-hairline);
  border-radius: var(--r-md);
  background: var(--paper-050);
}
.on-ink .ui-signal { background: rgba(255,255,255,0.03); border-color: rgba(255,255,255,0.08); }
.ui-signal__row { display: flex; align-items: center; gap: var(--s-3); }
.ui-signal__name {
  font-size: 0.75rem;
  color: var(--ink-500);
  width: 6.5rem;
  flex: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.on-ink .ui-signal__name { color: #93A3A8; }
.ui-signal__track { flex: 1; min-width: 0; }
.ui-signal__val {
  font-family: var(--font-metric);
  font-size: 0.6875rem;
  color: var(--ui-muted);
  flex: none;
  font-variant-numeric: tabular-nums;
}

/* ============================================================================
   Data table — firm administration
   ========================================================================= */
.ui-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.ui-table { width: 100%; min-width: 560px; font-size: 0.8125rem; }
.ui-table th {
  text-align: left;
  font-family: var(--font-metric);
  font-size: 0.5625rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ui-muted);
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--line-soft);
  white-space: nowrap;
}
.ui-table td {
  padding: 0.62rem 0.7rem;
  border-bottom: 1px solid var(--line-hairline);
  color: var(--ink-600);
  vertical-align: middle;
}
.on-ink .ui-table td { color: #A9BABD; border-bottom-color: rgba(255,255,255,0.07); }
.on-ink .ui-table th { border-bottom-color: rgba(255,255,255,0.14); }
.ui-table tbody tr { transition: background var(--dur-fast) var(--ease-out); }
.ui-table tbody tr:hover { background: var(--paper-050); }
.on-ink .ui-table tbody tr:hover { background: rgba(255,255,255,0.035); }
.ui-table__name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ink-900);
  font-weight: 480;
  white-space: nowrap;
}
.on-ink .ui-table__name { color: var(--paper-050); }
.ui-table__num { font-family: var(--font-metric); font-variant-numeric: tabular-nums; text-align: right; }

/* Status chip: shape + text, never colour alone. */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-metric);
  font-size: 0.5625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.16rem 0.4rem;
  border-radius: 2px;
  border: 1px solid;
  white-space: nowrap;
}
.chip::before { content: ""; width: 7px; height: 7px; flex: none; }
.chip--approved {
  color: var(--accent-700); border-color: var(--accent-200); background: var(--accent-050);
}
.chip--approved::before { background: var(--accent-500); }
.chip--submitted {
  color: var(--ink-600); border-color: var(--line-soft); background: var(--paper-100);
}
.chip--submitted::before { background: var(--ink-500); border-left: 2px solid var(--ink-900); }
.chip--draft {
  color: var(--ink-500); border-color: var(--line-soft); background: transparent;
}
.chip--draft::before { border: 1px solid var(--ink-400); }
.chip--missing {
  color: var(--flag-600); border-color: var(--flag-300); background: var(--flag-100);
}
.chip--missing::before {
  background: repeating-linear-gradient(-45deg, var(--flag-500) 0 1px, transparent 1px 3px);
  box-shadow: inset 0 0 0 1px var(--flag-300);
}
.on-ink .chip--approved { background: rgba(14,114,104,0.18); border-color: var(--accent-700); color: var(--accent-200); }
.on-ink .chip--submitted { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.16); color: var(--paper-100); }
.on-ink .chip--draft { border-color: rgba(255,255,255,0.16); color: #93A3A8; }
.on-ink .chip--missing { background: rgba(180,85,31,0.18); border-color: var(--flag-600); color: var(--flag-300); }

.ui-toolbar {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  flex-wrap: wrap;
  padding-bottom: var(--s-1);
}
.ui-tab {
  font-size: 0.75rem;
  padding: 0.3rem 0.6rem;
  border-radius: var(--r-sm);
  color: var(--ink-500);
  border: 1px solid transparent;
}
.ui-tab.is-active {
  color: var(--ink-900);
  border-color: var(--line-soft);
  background: var(--paper-000);
  font-weight: 500;
}
.on-ink .ui-tab.is-active { color: var(--paper-050); background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.14); }
.ui-search {
  margin-inline-start: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 0.6rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  font-size: 0.75rem;
  color: var(--ui-faint);
  min-width: 140px;
}
.ui-search i {
  width: 9px; height: 9px;
  border: 1.2px solid currentColor;
  border-radius: 50%;
  flex: none;
}

/* ============================================================================
   Reporting visuals
   ========================================================================= */
.ui-bars { display: grid; gap: 0.55rem; }
.ui-bar-row {
  display: grid;
  grid-template-columns: minmax(5.5rem, 7rem) minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--s-3);
}
.ui-bar-row__label {
  font-size: 0.75rem;
  color: var(--ink-500);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.on-ink .ui-bar-row__label { color: #93A3A8; }
.ui-bar-track {
  position: relative;
  height: 14px;
  background-image: repeating-linear-gradient(to right,
    var(--tick-color) 0 1px, transparent 1px calc(100% / 8));
  border-bottom: 1px solid var(--line-hairline);
}
.ui-bar {
  position: absolute;
  left: 0; bottom: 0;
  height: 10px;
  width: 0;
  transition: width 900ms var(--ease-out);
}
.is-charted .ui-bar { width: var(--w, 0%); }
.ui-bar--split { display: flex; }
.ui-bar__billable { background: var(--accent-500); height: 100%; }
.ui-bar__non {
  height: 100%;
  background: repeating-linear-gradient(-45deg, var(--ink-300) 0 1px, transparent 1px 5px);
  box-shadow: inset 0 0 0 1px var(--ink-200);
}
.on-ink .ui-bar__non { background: repeating-linear-gradient(-45deg, #667A80 0 1px, transparent 1px 5px); box-shadow: inset 0 0 0 1px rgba(255,255,255,0.16); }
.ui-bar-row__val {
  font-family: var(--font-metric);
  font-size: 0.75rem;
  color: var(--ink-600);
  font-variant-numeric: tabular-nums;
  text-align: right;
  min-width: 3.2rem;
}
.on-ink .ui-bar-row__val { color: var(--paper-100); }

/* Workload heat grid — density, not decoration. */
.ui-heat { display: grid; gap: 3px; }
.ui-heat__row { display: grid; grid-template-columns: 4.5rem repeat(5, minmax(0, 1fr)); gap: 3px; align-items: center; }
.ui-heat__label { font-size: 0.6875rem; color: var(--ui-muted); }
/* Each cell carries its own figure: the value is never colour-only.
   Level tint uses background alpha, not element opacity, so text stays legible. */
.ui-heat__cell {
  height: 24px;
  border-radius: 1px;
  position: relative;
  display: grid;
  place-items: center;
  font-family: var(--font-metric);
  font-size: 0.625rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  background: color-mix(in srgb, var(--accent-500) var(--heat, 100%), transparent);
  color: #fff;
}
.ui-heat__cell[data-level="0"] {
  background: var(--paper-150);
  color: var(--ui-muted);
}
.on-ink .ui-heat__cell[data-level="0"] { background: rgba(255,255,255,0.06); color: #7C8F93; }
.ui-heat__cell[data-level="1"] { --heat: 22%; color: var(--ink-700); }
.ui-heat__cell[data-level="2"] { --heat: 42%; color: var(--ink-800); }
.ui-heat__cell[data-level="3"] { --heat: 68%; }
.ui-heat__cell[data-level="4"] { --heat: 100%; }
.on-ink .ui-heat__cell[data-level="1"],
.on-ink .ui-heat__cell[data-level="2"] { color: var(--paper-050); }
/* A full day is additionally marked structurally, not by tint alone. */
.ui-heat__cell[data-level="4"]::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: var(--accent-800);
}
.on-ink .ui-heat__cell[data-level="4"]::after { background: var(--accent-200); }
.ui-heat__head { display: grid; grid-template-columns: 4.5rem repeat(5, minmax(0, 1fr)); gap: 3px; }
.ui-heat__head span {
  font-family: var(--font-metric);
  font-size: 0.5625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ui-faint);
  text-align: center;
}

.ui-stat { display: grid; gap: 0.2rem; }
.ui-stat__val {
  font-family: var(--font-metric);
  font-size: 1.5rem;
  font-weight: 300;
  letter-spacing: -0.03em;
  color: var(--ink-900);
  font-variant-numeric: tabular-nums;
}
.on-ink .ui-stat__val { color: var(--paper-000); }
.ui-stat__label {
  font-family: var(--font-metric);
  font-size: 0.5625rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ui-muted);
}
.ui-stat__note { font-size: 0.6875rem; color: var(--ui-muted); }

.ui-grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-5); }
.ui-grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s-5); }
.ui-divider { height: 1px; background: var(--line-hairline); }

/* --- Container-driven collapse: the interface adapts to its own width ----- */
@container (max-width: 640px) {
  .ui__body { grid-template-columns: minmax(0, 1fr); }
  .ui-rail { display: none; }
  .ui-selects { grid-template-columns: minmax(0, 1fr); }
  .ui-grid-2, .ui-grid-3 { grid-template-columns: minmax(0, 1fr); }
  .ui-entry { grid-template-columns: 52px minmax(0, 1fr) auto; }
  .ui-entry__band { display: none; }
}
@container (max-width: 460px) {
  .ui__main { padding: var(--s-4); }
  .ui-entry__time { display: none; }
  .ui-entry { grid-template-columns: minmax(0, 1fr) auto; }
  .ui-heat__row, .ui-heat__head { grid-template-columns: 3.2rem repeat(5, minmax(0, 1fr)); }
}