/* ── App Shell ────────────────────────────────────────────────── */
#app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ── Desktop Top Nav ──────────────────────────────────────────── */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(13,13,15,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 8px;
}

[data-theme="light"] .top-nav {
  background: rgba(242,242,248,0.85);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-right: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.18s;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text);
  background: var(--card);
}

.nav-link.active {
  color: var(--accent);
  background: var(--accent-dim);
  font-weight: 600;
}

.nav-link .nav-icon { font-size: 1rem; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.theme-toggle-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s;
}

.theme-toggle-btn:hover { background: var(--card); color: var(--text); }

/* ── Mobile Bottom Nav ────────────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--mob-nav-h);
  background: rgba(13,13,15,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  display: none;
  align-items: center;
  justify-content: space-around;
  padding: 0 8px;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

[data-theme="light"] .bottom-nav {
  background: rgba(255,255,255,0.95);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.18s;
  min-width: 52px;
}

.bottom-nav-item .nav-icon { font-size: 1.25rem; line-height: 1; }
.bottom-nav-item .nav-label { font-size: 0.6rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.bottom-nav-item.active { color: var(--accent); }
.bottom-nav-item.active .nav-icon { filter: drop-shadow(0 0 6px var(--accent)); }

/* ── Page Content ─────────────────────────────────────────────── */
#page-content {
  flex: 1;
  padding: 24px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* ── Page Header ──────────────────────────────────────────────── */
.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-top: 4px;
}

/* ── Grid Layouts ─────────────────────────────────────────────── */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* ── Stat Card ────────────────────────────────────────────────── */
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.stat-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.stat-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.stat-value.danger { color: var(--danger); }
.stat-value.warning { color: var(--warning); }
.stat-value.green  { color: var(--green); }
.stat-value.accent { color: var(--accent); }

/* ── Floating Action Button ───────────────────────────────────── */
.fab {
  position: fixed;
  bottom: calc(var(--mob-nav-h) + 16px);
  right: 20px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  border: none;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
  cursor: pointer;
  transition: all 0.2s;
  z-index: 50;
}

.fab:hover { transform: scale(1.08); box-shadow: 0 6px 28px rgba(108,99,255,0.5); }
.fab:active { transform: scale(0.95); }

/* Desktop FAB */
.fab-desktop {
  position: static;
  width: auto;
  height: auto;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: 0.875rem;
  box-shadow: 0 4px 16px rgba(108,99,255,0.3);
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  .top-nav { display: none; }
  .bottom-nav { display: flex; }

  #page-content {
    padding: 16px;
    padding-bottom: calc(var(--mob-nav-h) + 24px);
  }

  .grid-stats { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .form-row.cols-2 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .grid-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  #page-content { padding: 12px; }
}

/* ── Week view layout ─────────────────────────────────────────── */
.week-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.week-block {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.18s;
}

.week-block.expanded { border-color: var(--border-light); }

.week-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  user-select: none;
  transition: background 0.18s;
}

.week-header:hover { background: var(--card-hover); }

.week-number {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-family: var(--font-display);
  min-width: 24px;
}

.week-dates {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  flex: 1;
}

.week-chevron {
  color: var(--text-dim);
  transition: transform 0.2s;
  font-size: 0.75rem;
}

.week-block.expanded .week-chevron { transform: rotate(180deg); }

.week-body { padding: 0 18px 14px; }

.day-section { margin-top: 14px; }

.day-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Goals Grid ───────────────────────────────────────────────── */
.goals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

@media (max-width: 640px) {
  .goals-grid { grid-template-columns: 1fr; }
}

/* ── Notes Masonry ────────────────────────────────────────────── */
.notes-grid {
  columns: 3;
  column-gap: 16px;
}

.note-card {
  break-inside: avoid;
  margin-bottom: 16px;
}

@media (max-width: 900px) { .notes-grid { columns: 2; } }
@media (max-width: 560px) { .notes-grid { columns: 1; } }

/* ── Habits List ──────────────────────────────────────────────── */
.habits-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ── Month Selector ───────────────────────────────────────────── */
.month-selector {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 20px;
}

.month-nav-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s;
  flex-shrink: 0;
}

.month-nav-btn:hover { background: var(--card-hover); color: var(--text); }

.month-display {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  flex: 1;
  text-align: center;
}