:root {
  --bg: #fbf6ec;
  --surface: #ffffff;
  --ink: #2d2a26;
  --ink-soft: #6b665c;
  --line: #e8e0cf;
  --shadow: 0 1px 2px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  --radius: 14px;
  --tap: 44px;

  /* Habit accent palette (named) */
  --c-peach:   #f4a679;
  --c-sage:    #88aa86;
  --c-sky:     #6fa6c2;
  --c-lilac:   #a991c2;
  --c-butter:  #e8c66b;
  --c-rose:    #d68a9d;
  --c-mint:    #7cbfa9;
  --c-slate:   #7c8a99;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: ui-rounded, system-ui, -apple-system, "Segoe UI Variable",
               "Inter", sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

#app { padding: 0; }

/* Top bar */
.bar {
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  z-index: 1;
}
.bar h1 { font-size: 18px; margin: 0; flex: 1; }
.bar .tabs { display: flex; gap: 4px; }
.tab {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--ink-soft);
  font-size: 14px;
  cursor: pointer;
}
.tab.active { background: var(--surface); border-color: var(--line); color: var(--ink); }
.bar .icon-btn {
  border: none; background: transparent; cursor: pointer;
  width: var(--tap); height: var(--tap);
  font-size: 18px; color: var(--ink-soft);
}

/* Today grid */
.grid {
  padding: 8px 12px 80px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.row {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px 14px;
  display: grid;
  grid-template-columns: 1fr repeat(4, var(--tap));
  align-items: center;
  gap: 8px;
}
.row .label { display: flex; align-items: center; gap: 8px; min-width: 0; }
.row .label .emoji { font-size: 20px; }
.row .label .name { font-size: 16px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row .col-head { font-size: 11px; color: var(--ink-soft); text-align: center; }
.cell {
  width: var(--tap); height: var(--tap);
  border-radius: 12px;
  border: 2px solid var(--accent, var(--ink-soft));
  background: transparent;
  cursor: pointer;
  transition: background 80ms ease, transform 60ms ease;
}
.cell:active { transform: scale(0.94); }
.cell.ticked { background: var(--accent, var(--ink-soft)); }
.cell:disabled { opacity: 0.4; cursor: default; }

/* Header row above grid showing day-of-week labels */
.head {
  display: grid;
  grid-template-columns: 1fr repeat(4, var(--tap));
  padding: 4px 14px;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.head > div { text-align: center; }
.head > div:first-child { text-align: left; visibility: hidden; }

/* Per-habit accents */
.row[data-color="peach"]   { --accent: var(--c-peach); }
.row[data-color="sage"]    { --accent: var(--c-sage); }
.row[data-color="sky"]     { --accent: var(--c-sky); }
.row[data-color="lilac"]   { --accent: var(--c-lilac); }
.row[data-color="butter"]  { --accent: var(--c-butter); }
.row[data-color="rose"]    { --accent: var(--c-rose); }
.row[data-color="mint"]    { --accent: var(--c-mint); }
.row[data-color="slate"]   { --accent: var(--c-slate); }

/* Login */
.login {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  width: 100%;
  max-width: 320px;
}
.login-card h1 { margin: 0 0 16px; font-size: 22px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.field input {
  font-size: 16px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg);
}
.btn-primary {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: none;
  background: var(--ink);
  color: var(--bg);
  font-size: 16px;
  cursor: pointer;
}

/* Toast */
.toast {
  position: fixed;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--bg);
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 13px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}
.toast.show { opacity: 1; }

/* Sync indicator */
.sync-pill {
  position: fixed;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  right: 16px;
  background: var(--ink-soft);
  color: white;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  display: none;
}
.sync-pill.show { display: block; }

@media (min-width: 720px) {
  .grid { max-width: 720px; margin: 0 auto; }
  .head { max-width: 720px; margin: 0 auto; }
  .bar { max-width: 720px; margin: 0 auto; }
}