.app-shell {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}

/* ---------- sidebar ---------- */
.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 28px 22px;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: sticky;
  top: 28px;
}

.sidebar-brand {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 4px;
}

.week-label {
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--fg);
}

.week-year {
  font-size: 14px;
  color: var(--fg-muted);
  margin-top: -8px;
}

.week-range {
  font-size: 15px;
  color: var(--fg);
  margin-top: 4px;
}

.week-nav {
  display: flex;
  gap: 6px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.nav-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
  transition: background 0.12s ease, border-color 0.12s ease;
}

.nav-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.today-btn.is-active {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}

.sidebar-foot {
  padding-top: 12px;
  font-size: 12px;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* ---------- login screen ---------- */
.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-elev);
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}

.login-brand {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.login-tagline {
  font-size: 14px;
  color: var(--fg-muted);
  margin: 0;
  line-height: 1.5;
}

.login-btn-host {
  display: flex;
  justify-content: center;
  margin-top: 8px;
  min-height: 40px;
}

.login-foot {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 8px;
}

/* ---------- user pill ---------- */
.user-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-top: auto;
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.user-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--fg);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sync-badge {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
}

.sync-badge.is-idle { color: var(--done); }
.sync-badge.is-loading { color: var(--accent); }
.sync-badge.is-offline { color: var(--danger); }

.user-signout {
  font-size: 11px;
  color: var(--fg-muted);
  padding: 4px 8px;
  border-radius: 4px;
  transition: background 0.12s, color 0.12s;
}

.user-signout:hover {
  background: rgba(192, 57, 43, 0.1);
  color: var(--danger);
}

/* ---------- sidebar week cards ---------- */
.card-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 18px;
}

.week-card {
  text-align: left;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  transition: border-color 0.12s ease, transform 0.08s ease, box-shadow 0.12s ease;
}

.week-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.week-card.is-center {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset, var(--shadow);
  background: #fbfdff;
}

.week-card.is-this-week .week-card-tag {
  color: var(--accent);
}

.week-card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.week-card-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: 0.02em;
}

.week-card-tag {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}

.week-card-range {
  font-size: 12px;
  color: var(--fg-muted);
}

.week-card-bar {
  height: 4px;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 4px;
}

.week-card-fill {
  height: 100%;
  background: var(--done);
  border-radius: 2px;
  transition: width 0.2s ease;
}

.week-card-stats {
  font-size: 11px;
  color: var(--fg-muted);
}

.week-card-section {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 6px;
}

.week-card-section-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  opacity: 0.7;
}

.week-card-dots {
  display: flex;
  gap: 4px;
  align-items: center;
  height: 10px;
}

.card-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.08);
  flex: 0 0 auto;
  transition: background 0.15s ease, transform 0.15s ease;
}

.card-dot.is-on {
  background: var(--accent);
  transform: scale(1.1);
}

/* ---------- main ---------- */
.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  padding: 28px 32px 16px;
}

.topbar-row {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.add-wrap {
  flex: 1;
  min-width: 240px;
}

.add-input {
  width: 100%;
  max-width: 480px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  outline: none;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

.add-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.counters {
  display: flex;
  gap: 22px;
  align-items: baseline;
  flex-wrap: wrap;
  margin-left: auto;
}

.counter {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.counter-num {
  font-size: 26px;
  font-weight: 700;
}

.counter-done .counter-num { color: var(--done); }
.counter-empty .counter-num { color: var(--fg-muted); }
.counter-total .counter-num { color: var(--fg); }

.counter-label {
  font-size: 12px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- grid stack ---------- */
.grid {
  padding: 8px 32px 48px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.week-block {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  opacity: 0.85;
  transition: opacity 0.15s ease, box-shadow 0.15s ease;
}

.week-block:hover { opacity: 1; }

.week-block.is-current {
  opacity: 1;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset, var(--shadow-elev);
}

.week-block-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 18px;
  background: #f8fafc;
  border-bottom: 1px solid var(--border);
}

.week-block.is-current .week-block-head {
  background: var(--accent-soft);
}

.week-block-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: 0.02em;
}

.week-block-range {
  font-size: 13px;
  color: var(--fg-muted);
}

.current-pill {
  margin-left: auto;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(21, 118, 183, 0.12);
  padding: 3px 8px;
  border-radius: 999px;
}

.grid-table {
  display: flex;
  flex-direction: column;
}

.grid-row {
  display: grid;
  grid-template-columns: minmax(180px, 1.4fr) repeat(7, minmax(56px, 1fr));
  align-items: stretch;
}

.grid-row + .grid-row {
  border-top: 1px solid var(--border);
}

/* extra visual separation between habit rows (non-header) */
.grid-row.grid-header + .grid-row,
.grid-row:not(.grid-header) + .grid-row:not(.grid-header) {
  border-top-color: var(--border);
}

.grid-header {
  background: transparent;
}

.week-meta {
  padding: 10px 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.week-meta-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--fg-muted);
}

.week-meta-year {
  font-size: 11px;
  color: var(--fg-muted);
  opacity: 0.7;
}

.day-head {
  padding: 8px 6px;
  text-align: center;
  border-left: 1px solid var(--border);
}

.day-head.is-today {
  background: var(--accent-soft);
}

.day-name {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.day-head.is-today .day-name {
  color: var(--accent);
}

.day-date {
  font-size: 16px;
  font-weight: 600;
  margin-top: 1px;
}

/* ---------- habit row ---------- */
/* legacy single-line habit name cell, superseded above */

.habit-swatch {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.1);
}

.habit-name {
  font-size: 14px;
  font-weight: 500;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
  line-height: 1.3;
  flex: 1;
}

.habit-duration {
  font-size: 12px;
  color: var(--fg-muted);
  background: transparent;
  border: 1px dashed transparent;
  border-radius: 4px;
  padding: 2px 6px;
  margin-top: 4px;
  width: 100%;
  outline: none;
  font-style: italic;
  transition: border-color 0.12s ease, background 0.12s ease, color 0.12s ease;
}

.habit-duration:hover {
  border-color: var(--border-strong);
  color: var(--fg);
}

.habit-duration:focus {
  border-style: solid;
  border-color: var(--accent);
  background: var(--bg-elevated);
  color: var(--fg);
  font-style: normal;
}

.habit-duration::placeholder {
  color: var(--fg-muted);
  opacity: 0.6;
}

.habit-name-cell {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 2px;
  padding: 10px 14px;
  min-width: 0;
}

.habit-name-line {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  min-width: 0;
}

.delete-btn {
  font-size: 11px;
  color: var(--fg-muted);
  padding: 2px 6px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.12s, background 0.12s, color 0.12s;
}

.habit-name-cell:hover .delete-btn {
  opacity: 0.7;
}

.delete-btn:hover {
  opacity: 1 !important;
  background: rgba(192, 57, 43, 0.1);
  color: var(--danger);
}

/* ---------- cell ---------- */
.cell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  border-left: 1px solid var(--border);
  background: transparent;
  transition: background 0.12s ease;
  position: relative;
}

.cell:hover {
  background: var(--accent-soft);
}

.cell.is-today {
  background: rgba(21, 118, 183, 0.05);
}

.cell.is-today:hover {
  background: var(--accent-soft);
}

.cross-mark {
  width: 38px;
  height: 38px;
  pointer-events: none;
}

/* ---------- tongue twisters ---------- */
.twisters {
  padding: 8px 32px 48px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.twister-head {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.twister-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--fg);
}

.twister-sub {
  font-size: 12px;
  color: var(--fg-muted);
}

.twister-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 6px;
}

.twister-card {
  text-align: left;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
  transition: transform 0.08s ease, border-color 0.12s ease, box-shadow 0.12s ease;
  min-height: 150px;
  position: relative;
  overflow: hidden;
}

.twister-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.twister-card:active {
  transform: translateY(0);
}

.twister-card.is-today {
  background: linear-gradient(180deg, rgba(21,118,183,0.06), var(--bg-elevated));
}

.twister-card.is-done {
  border-color: var(--done);
  background: linear-gradient(180deg, rgba(15,157,88,0.08), var(--bg-elevated));
}

.twister-card-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.twister-day {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}

.twister-date {
  font-size: 14px;
  font-weight: 700;
  color: var(--fg);
}

.twister-today-pill {
  margin-left: auto;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(21, 118, 183, 0.12);
  padding: 2px 7px;
  border-radius: 999px;
}

.twister-text {
  flex: 1;
  font-size: 15px;
  line-height: 1.4;
  color: var(--fg);
  font-family: Georgia, "Times New Roman", serif;
}

.twister-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: auto;
}

.twister-dots {
  display: flex;
  gap: 5px;
}

.twister-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.08);
  transition: background 0.15s ease, transform 0.15s ease;
}

.twister-dot.is-on {
  background: var(--done);
  transform: scale(1.05);
}

.twister-count {
  font-size: 11px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.twister-card.is-done .twister-count {
  color: var(--done);
  font-weight: 600;
}

/* ---------- empty state ---------- */
.empty-state {
  padding: 48px 32px;
  text-align: center;
  color: var(--fg-muted);
  background: var(--bg-elevated);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}

.empty-state p {
  margin: 4px 0;
}

.empty-hint {
  font-size: 14px;
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 20px;
  }
  .sidebar-inner {
    position: static;
  }
  .week-label {
    font-size: 28px;
  }
  .counters {
    margin-left: 0;
  }
  .grid-row {
    grid-template-columns: minmax(120px, 1fr) repeat(7, minmax(40px, 1fr));
  }
  .topbar, .grid {
    padding-left: 16px;
    padding-right: 16px;
  }
}