* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #121212;
  --surface: #1e1e1e;
  --primary: #bb86fc;
  --on-bg: #e0e0e0;
  --on-surface: #ffffff;
  --positive: #cf6679;
  --negative: #03dac6;
  --muted: #888;
  --border: #333;
  --radius: 8px;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--on-bg);
  font-size: 16px;
  line-height: 1.4;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header / date navigation */
.day-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.day-header button {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 24px;
  padding: 8px;
  cursor: pointer;
  border-radius: var(--radius);
}

.day-header button:active {
  background: rgba(187, 134, 252, 0.15);
}

.day-header .date-text {
  font-size: 18px;
  font-weight: 500;
  color: var(--on-surface);
}

/* Weight display */
.weight-row {
  padding: 8px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  color: var(--muted);
}

.weight-row span {
  color: var(--on-surface);
  font-weight: 500;
}

/* Entry list */
.entries {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.entry-item {
  display: grid;
  grid-template-columns: 50px 1fr 70px;
  align-items: center;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}

.entry-item:active {
  background: rgba(255, 255, 255, 0.05);
}

.entry-time {
  font-size: 13px;
  color: var(--muted);
}

.entry-desc {
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.entry-kcal {
  text-align: right;
  font-size: 14px;
  font-weight: 500;
}

.entry-kcal.intake {
  color: var(--positive);
}

.entry-kcal.expenditure {
  color: var(--negative);
}

/* Balance summary */
.balance-bar {
  display: flex;
  justify-content: space-around;
  padding: 12px 16px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  font-size: 14px;
}

.balance-bar .label {
  color: var(--muted);
  font-size: 12px;
}

.balance-bar .value {
  font-size: 18px;
  font-weight: 600;
}

.balance-bar .value.deficit {
  color: var(--negative);
}

.balance-bar .value.surplus {
  color: var(--positive);
}

/* FAB (add button) */
.fab {
  position: fixed;
  bottom: 80px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary);
  color: #000;
  border: none;
  font-size: 28px;
  font-weight: 300;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

.fab:active {
  transform: scale(0.95);
}

/* Bottom nav */
.bottom-nav {
  display: flex;
  justify-content: space-around;
  padding: 10px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  position: sticky;
  bottom: 0;
}

.bottom-nav button {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 12px;
  padding: 4px 16px;
  cursor: pointer;
}

.bottom-nav button.active {
  color: var(--primary);
}

/* Modal / add entry overlay */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.modal-sheet {
  background: var(--surface);
  width: 100%;
  max-width: 480px;
  border-radius: 16px 16px 0 0;
  padding: 20px 16px;
  max-height: 85vh;
  overflow-y: auto;
}

.modal-sheet h2 {
  font-size: 18px;
  margin-bottom: 16px;
  color: var(--on-surface);
}

/* Form elements */
.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--on-surface);
  font-size: 16px;
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.type-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.type-chip {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: none;
  color: var(--on-bg);
  font-size: 14px;
  cursor: pointer;
}

.type-chip.selected {
  background: var(--primary);
  color: #000;
  border-color: var(--primary);
}

.btn-row {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.btn {
  flex: 1;
  padding: 12px;
  border-radius: var(--radius);
  border: none;
  font-size: 16px;
  font-family: inherit;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: #000;
  font-weight: 600;
}

.btn-secondary {
  background: var(--border);
  color: var(--on-bg);
}

/* Setup screen */
.setup-screen {
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 100vh;
  justify-content: center;
}

.setup-screen h1 {
  font-size: 24px;
  color: var(--on-surface);
  text-align: center;
}

.setup-screen p {
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

/* Kcal preview */
.kcal-preview {
  padding: 10px 12px;
  background: rgba(187, 134, 252, 0.1);
  border-radius: var(--radius);
  text-align: center;
  font-size: 18px;
  font-weight: 500;
  color: var(--primary);
}

/* Empty state */
.empty-state {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 15px;
  padding: 40px;
  text-align: center;
}

/* Screen layout */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.bottom-nav {
  order: 2;
  position: sticky;
  bottom: 0;
}

.screen-content {
  order: 1;
  flex: 1;
  overflow-y: auto;
  padding-bottom: 8px;
}

.nav-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 13px;
  padding: 8px 12px;
  cursor: pointer;
  font-family: inherit;
}

.nav-btn.active {
  color: var(--primary);
  font-weight: 600;
}

/* Day navigation */
.day-header h2 {
  font-size: 15px;
  font-weight: 500;
  text-align: center;
}

.day-nav {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 20px;
  padding: 4px 10px;
  cursor: pointer;
}

/* Summary cards */
.summary-row {
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.summary-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 4px;
  border-radius: var(--radius);
  background: var(--bg);
}

.summary-val {
  font-size: 18px;
  font-weight: 700;
}

.summary-lbl {
  font-size: 10px;
  color: var(--muted);
  text-align: center;
}

.summary-card.surplus  .summary-val { color: #cf6679; }
.summary-card.deficit  .summary-val { color: #03dac6; }
.summary-card.balanced .summary-val { color: var(--on-bg); }

/* Log sections */
.log-section {
  padding: 0 0 4px;
  border-bottom: 1px solid var(--border);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px 4px;
}

.section-header h3 {
  font-size: 13px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.add-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
}

.log-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.log-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.log-time {
  font-size: 12px;
  color: var(--muted);
  min-width: 38px;
}

.log-desc {
  flex: 1;
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.log-desc small {
  color: var(--muted);
  margin-left: 4px;
  font-size: 11px;
}

.log-kcal {
  font-size: 13px;
  color: var(--muted);
  min-width: 52px;
  text-align: right;
}

.log-empty {
  padding: 6px 14px;
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
}

.del-btn {
  background: none;
  border: none;
  color: #555;
  font-size: 14px;
  cursor: pointer;
  padding: 2px 4px;
  flex-shrink: 0;
}

.del-btn:active { color: #cf6679; }

/* Sleep info */
.sleep-info {
  padding: 6px 14px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sleep-line {
  font-size: 13px;
  color: var(--on-bg);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.modal {
  background: var(--surface);
  width: 100%;
  max-width: 480px;
  border-radius: 16px 16px 0 0;
  padding: 20px 16px 16px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal h3 {
  font-size: 17px;
  margin-bottom: 16px;
}

.modal-btns {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.btn-primary, .btn-secondary {
  flex: 1;
  padding: 12px;
  border-radius: var(--radius);
  border: none;
  font-size: 16px;
  font-family: inherit;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: #000;
  font-weight: 600;
}

.btn-secondary {
  background: var(--border);
  color: var(--on-bg);
}

.full-width { width: 100%; }

/* Products screen */
.stub-screen, .settings-screen {
  padding: 16px;
}

.stub-screen h2, .settings-screen h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.stub-note {
  color: var(--muted);
  font-size: 14px;
  margin-top: 8px;
}

.search-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--on-surface);
  font-size: 16px;
  font-family: inherit;
  margin-bottom: 12px;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
}

.prod-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 4px;
  border-bottom: 1px solid var(--border);
}

.prod-name {
  font-size: 14px;
  flex: 1;
}

.prod-name small {
  color: var(--muted);
  font-size: 12px;
  margin-left: 4px;
}

.prod-kcal {
  font-size: 13px;
  color: var(--muted);
}

/* Loading */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--muted);
}