/* ───────────────────────────────────────────────
   Design Tokens — Dark (Luxury Monochrome)
   ─────────────────────────────────────────────── */
:root,
[data-theme="dark"] {
  --bg:            #0a0a0a;
  --bg-surface:    #111111;
  --bg-raised:     #1a1a1a;
  --bg-hover:      #222222;
  --border:        rgba(255,255,255,.07);
  --border-strong: rgba(255,255,255,.12);
  --text-primary:  #f0f0f0;
  --text-secondary:#8a8a8a;
  --text-muted:    #505050;
  --accent:        #ffffff;
  --accent-soft:   rgba(255,255,255,.06);
  --accent-glow:   rgba(255,255,255,.10);
  --success:       #a0a0a0;
  --success-glow:  rgba(255,255,255,.06);
  --danger:        #888;
  --streak-bg:     rgba(255,255,255,.03);
  --streak-border: rgba(255,255,255,.08);
  --streak-color:  #ffffff;
  --progress-from: #444;
  --progress-to:   #fff;
  --gold:          #c8a96e;
  --gold-soft:     rgba(200,169,110,.08);
  --gold-border:   rgba(200,169,110,.18);
  --ring-fg:       #888;
  --ring-complete: #fff;

  /* Typography */
  --font-heading: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;

  /* Radii */
  --r-sm:  6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 18px;

  /* Transitions */
  --ease: cubic-bezier(.4,0,.2,1);
}

/* ─── Light Theme ─── */
[data-theme="light"] {
  --bg:            #fafafa;
  --bg-surface:    #ffffff;
  --bg-raised:     #f0f0f0;
  --bg-hover:      #e8e8e8;
  --border:        rgba(0,0,0,.06);
  --border-strong: rgba(0,0,0,.10);
  --text-primary:  #111111;
  --text-secondary:#666666;
  --text-muted:    #aaaaaa;
  --accent:        #111111;
  --accent-soft:   rgba(0,0,0,.04);
  --accent-glow:   rgba(0,0,0,.06);
  --success:       #666;
  --success-glow:  rgba(0,0,0,.04);
  --danger:        #999;
  --streak-bg:     rgba(0,0,0,.02);
  --streak-border: rgba(0,0,0,.06);
  --streak-color:  #111;
  --progress-from: #ccc;
  --progress-to:   #111;
  --gold:          #a08040;
  --gold-soft:     rgba(160,128,64,.06);
  --gold-border:   rgba(160,128,64,.12);
  --ring-fg:       #aaa;
  --ring-complete: #111;
}

/* ───────────────────────────────────────────────
   Reset & Base
   ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  letter-spacing: .01em;
  transition: background .5s var(--ease), color .5s var(--ease);
}
button { cursor: pointer; font-family: inherit; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; color: inherit; }
ul { list-style: none; }

/* ───────────────────────────────────────────────
   Confetti Canvas
   ─────────────────────────────────────────────── */
#confetti-canvas {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
}

/* ───────────────────────────────────────────────
   Layout
   ─────────────────────────────────────────────── */
#app {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100dvh;
}

/* ───────────────────────────────────────────────
   Sidebar
   ─────────────────────────────────────────────── */
#sidebar {
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow-y: auto;
  transition: background .5s var(--ease), border-color .5s var(--ease);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  width: 22px;
  height: 22px;
  color: var(--text-secondary);
}
.logo h1 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -.02em;
}

/* ─── Theme toggle ─── */
.theme-toggle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.theme-toggle:hover { background: var(--bg-hover); border-color: var(--border-strong); transform: scale(1.06); }
.theme-svg { width: 15px; height: 15px; color: var(--text-secondary); transition: color .3s var(--ease); }

/* ─── Today card ─── */
.today-card {
  background: var(--bg-raised);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .5s var(--ease);
}
.today-card:hover { transform: translateY(-1px); box-shadow: 0 8px 32px rgba(0,0,0,.3); }
.today-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.today-label {
  font-family: var(--font-heading);
  font-size: .65rem;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .12em;
}
.today-arrow { width: 14px; height: 14px; color: var(--text-muted); }
.today-date { font-size: .95rem; font-weight: 500; }

/* ─── Streak card ─── */
.streak-card {
  background: var(--gold-soft);
  border: 1px solid var(--gold-border);
  border-radius: var(--r-lg);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.streak-card:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(200,169,110,.08); }
.streak-icon-wrap {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gold-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.streak-icon {
  width: 20px;
  height: 20px;
  color: var(--gold);
}
.streak-info { display: flex; flex-direction: column; }
.streak-count {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  letter-spacing: -.02em;
}
.streak-label {
  font-size: .65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 500;
  margin-top: 2px;
}
.streak-card.no-streak { opacity: .4; }
.streak-card.no-streak .streak-icon-wrap { animation: none; }

/* ─── Progress bar ─── */
.progress-bar {
  height: 3px;
  background: var(--bg-hover);
  border-radius: 99px;
  overflow: hidden;
  flex: 1;
  transition: background .5s var(--ease);
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--progress-from), var(--progress-to));
  border-radius: 99px;
  width: 0%;
  transition: width .5s var(--ease);
}
.today-progress, .day-panel-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 2px;
}
.progress-text {
  font-size: .7rem;
  color: var(--text-muted);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

/* ─── Templates section ─── */
.templates-section { display: flex; flex-direction: column; gap: 10px; }
.section-header {
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-icon { width: 16px; height: 16px; color: var(--text-muted); }
.section-header h2 {
  font-family: var(--font-heading);
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: -.01em;
}
.hint { font-size: .7rem; color: var(--text-muted); line-height: 1.5; }

/* ─── Day Picker ─── */
.day-picker {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px 0 0;
}
.day-picker-label {
  font-size: .65rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .1em;
}
.day-pills { display: flex; gap: 4px; }
.day-pill {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  font-size: .68rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s var(--ease);
  letter-spacing: 0;
}
.day-pill:hover { border-color: var(--border-strong); color: var(--text-primary); }
.day-pill.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
.day-picker-hint { font-size: .65rem; color: var(--text-muted); }

/* Template item day badges */
.template-days {
  display: flex;
  gap: 2px;
  margin-left: auto;
}
.template-day-badge {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: .5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ─── Checklist ─── */
.checklist { display: flex; flex-direction: column; gap: 3px; }
.checklist-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-raised);
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: background .2s var(--ease), border-color .2s var(--ease);
  animation: fadeSlideIn .3s var(--ease);
}
.checklist-item:hover { background: var(--bg-hover); border-color: var(--border); }
.checklist-item.checked .item-text { text-decoration: line-through; color: var(--text-muted); }

/* Custom checkbox */
.custom-checkbox {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 1.5px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all .2s var(--ease);
  cursor: pointer;
}
.custom-checkbox:hover { border-color: var(--text-secondary); }
.checklist-item.checked .custom-checkbox {
  background: var(--accent);
  border-color: var(--accent);
}
.custom-checkbox .check-icon {
  opacity: 0;
  font-size: .55rem;
  color: var(--bg);
  transition: opacity .2s var(--ease);
  font-weight: 700;
}
.checklist-item.checked .custom-checkbox .check-icon { opacity: 1; }

.item-text { flex: 1; font-size: .82rem; font-weight: 400; }

.item-delete {
  opacity: 0;
  font-size: .7rem;
  color: var(--text-muted);
  transition: opacity .15s var(--ease), color .15s var(--ease);
  padding: 2px 4px;
}
.checklist-item:hover .item-delete { opacity: .5; }
.item-delete:hover { opacity: 1 !important; color: var(--text-primary); }

/* ─── Add form ─── */
.add-item-form {
  display: flex;
  gap: 6px;
}
.add-item-form input {
  flex: 1;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 9px 14px;
  font-size: .8rem;
  outline: none;
  transition: border-color .2s var(--ease), background .5s var(--ease);
}
.add-item-form input::placeholder { color: var(--text-muted); }
.add-item-form input:focus { border-color: var(--border-strong); }
.add-item-form button {
  width: 34px;
  height: 34px;
  border-radius: var(--r-sm);
  background: var(--accent);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .15s var(--ease), opacity .2s var(--ease);
}
.add-item-form button svg { width: 16px; height: 16px; }
.add-item-form button:hover { transform: scale(1.06); }

/* ───────────────────────────────────────────────
   Main / Calendar
   ─────────────────────────────────────────────── */
#main {
  padding: 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  transition: background .5s var(--ease);
}

#cal-header {
  display: flex;
  align-items: center;
  gap: 12px;
}
#cal-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -.03em;
}
.nav-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s var(--ease), border-color .2s var(--ease), transform .15s var(--ease);
}
.nav-btn svg { width: 15px; height: 15px; color: var(--text-secondary); }
.nav-btn:hover { background: var(--bg-hover); border-color: var(--border-strong); transform: scale(1.04); }

.today-nav-btn {
  margin-left: auto;
  padding: 6px 18px;
  border-radius: var(--r-sm);
  background: var(--accent-soft);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .02em;
  transition: background .2s var(--ease), border-color .2s var(--ease), transform .15s var(--ease);
}
.today-nav-btn:hover { background: var(--bg-hover); border-color: var(--border-strong); transform: scale(1.02); }

/* Weekday labels */
#cal-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-size: .65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-muted);
  padding: 0 2px;
}

/* Grid */
#cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.cal-cell {
  aspect-ratio: 1;
  border-radius: var(--r-md);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 4px 6px;
  gap: 4px;
  cursor: pointer;
  transition: all .2s var(--ease);
  position: relative;
  overflow: hidden;
}
.cal-cell:hover {
  background: var(--bg-raised);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}
.cal-cell.other-month { opacity: .25; }
.cal-cell.today {
  border-color: var(--accent);
}
.cal-cell.selected {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.cal-cell.all-done {
  border-color: var(--border-strong);
  background: var(--accent-soft);
}
.cal-cell.all-done.today {
  border-color: var(--accent);
}

.cal-cell .day-number {
  font-size: .82rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.cal-cell.today .day-number {
  background: var(--accent);
  color: var(--bg);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: .78rem;
}

/* Note indicator */
.cell-note-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold);
  position: absolute;
  top: 6px;
  right: 6px;
  opacity: 0.6;
}

/* Mini progress ring */
.cell-progress {
  width: 22px;
  height: 22px;
  position: relative;
}
.cell-progress svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.cell-progress .ring-bg { fill: none; stroke: var(--bg-hover); stroke-width: 2.5; }
.cell-progress .ring-fg { fill: none; stroke: var(--ring-fg); stroke-width: 2.5; stroke-linecap: round; transition: stroke-dashoffset .4s var(--ease); }
.cell-progress.complete .ring-fg { stroke: var(--ring-complete); }

.cell-check-count {
  font-size: .5rem;
  color: var(--text-muted);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ───────────────────────────────────────────────
   Day Panel (detail view)
   ─────────────────────────────────────────────── */
.day-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-xl);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: panelIn .3s var(--ease);
  transition: background .5s var(--ease), border-color .5s var(--ease);
}
.day-panel.hidden { display: none; }
.day-panel-header { display: flex; align-items: center; justify-content: space-between; }
.day-panel-header h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -.02em;
}
.close-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s var(--ease), border-color .15s var(--ease);
}
.close-btn svg { width: 13px; height: 13px; color: var(--text-muted); }
.close-btn:hover { background: var(--bg-hover); border-color: var(--border-strong); }

/* ─── Notes ─── */
.day-notes {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.notes-label {
  font-size: .72rem;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.notes-icon { width: 14px; height: 14px; }
.notes-textarea {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  font-size: .8rem;
  line-height: 1.6;
  resize: vertical;
  min-height: 60px;
  outline: none;
  transition: border-color .2s var(--ease), background .5s var(--ease);
}
.notes-textarea:focus { border-color: var(--border-strong); }
.notes-textarea::placeholder { color: var(--text-muted); }

/* ───────────────────────────────────────────────
   Animations
   ─────────────────────────────────────────────── */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes panelIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ───────────────────────────────────────────────
   Responsive
   ─────────────────────────────────────────────── */
@media (max-width: 820px) {
  #app { grid-template-columns: 1fr; }
  #sidebar {
    position: fixed;
    inset: 0;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform .35s var(--ease);
    width: 300px;
  }
  #sidebar.open { transform: translateX(0); }
  #main { padding: 20px 16px; }
  .cal-cell { aspect-ratio: auto; min-height: 64px; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-hover); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ───────────────────────────────────────────────
   Auth Overlay
   ─────────────────────────────────────────────── */
.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .4s var(--ease);
}
.auth-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.auth-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 48px 40px;
  max-width: 380px;
  width: 100%;
}
.auth-logo {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--bg-raised);
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
}
.auth-logo svg { width: 28px; height: 28px; color: var(--text-secondary); }
.auth-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -.04em;
  margin-top: 4px;
}
.auth-subtitle {
  font-size: .9rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 14px 24px;
  border-radius: var(--r-md);
  background: #fff;
  color: #333;
  font-size: .9rem;
  font-weight: 500;
  border: 1px solid #dadce0;
  transition: transform .15s var(--ease), box-shadow .2s var(--ease);
  cursor: pointer;
}
.google-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,0,0,.15);
}
.google-icon { width: 20px; height: 20px; flex-shrink: 0; }
.auth-footer {
  font-size: .72rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ─── User Profile ─── */
.user-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border-strong);
}
.user-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.user-name {
  font-size: .8rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.user-email {
  font-size: .65rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.signout-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}
.signout-btn svg { width: 14px; height: 14px; color: var(--text-muted); }
.signout-btn:hover { background: var(--bg-surface); border-color: var(--border-strong); }

/* ─── App hidden state ─── */
.app-hidden { display: none !important; }

/* ─── Save indicator ─── */
.save-indicator {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--bg-raised);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  padding: 8px 14px;
  font-size: .72rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .3s var(--ease), transform .3s var(--ease);
  z-index: 100;
  pointer-events: none;
}
.save-indicator.visible {
  opacity: 1;
  transform: translateY(0);
}
.save-spinner {
  width: 14px;
  height: 14px;
  animation: spin .8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}