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

:root {
  --bg: #0f0f13;
  --bg2: #16161d;
  --bg3: #1e1e28;
  --border: #2a2a38;
  --text: #e8e8f0;
  --text2: #9090a8;
  --accent: #6c63ff;
  --accent2: #a78bfa;
  --green: #34d399;
  --red: #f87171;
  --orange: #fb923c;
  --radius: 14px;
  --radius-sm: 8px;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}

.screen { min-height: 100vh; }
.hidden { display: none !important; }

/* AUTH */
.auth-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px 20px;
  gap: 0;
}

.auth-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-bottom: 36px;
}

.auth-icon { width: 72px; height: 72px; border-radius: 18px; }

.auth-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-sub { color: var(--text2); font-size: 0.9rem; }

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 360px;
}

input[type="text"], input[type="password"], input[type="date"] {
  background: var(--bg3);
  border: 1.5px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 1rem;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}

input:focus { border-color: var(--accent); }
input::placeholder { color: var(--text2); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 20px;
  cursor: pointer;
  transition: opacity 0.12s, transform 0.08s;
  min-height: 48px;
  user-select: none;
}

.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: var(--bg3); color: var(--text); border: 1.5px solid var(--border); }
.btn-outline { background: transparent; color: var(--text2); border: 1.5px solid var(--border); }
.btn-outline:hover { border-color: var(--accent2); color: var(--accent2); }
.btn-ghost { background: transparent; color: var(--text2); }
.btn-ghost:hover { color: var(--text); }
.btn-danger { background: rgba(248,113,113,0.12); color: var(--red); border: 1.5px solid rgba(248,113,113,0.3); }
.btn-danger:hover { background: rgba(248,113,113,0.2); }
.btn-sm { font-size: 0.85rem; padding: 8px 14px; min-height: 36px; }

.auth-msg {
  min-height: 24px;
  font-size: 0.9rem;
  text-align: center;
  color: var(--red);
}
.auth-msg.success { color: var(--green); }

/* TOPBAR */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  padding-top: max(12px, env(safe-area-inset-top));
}

.topbar-left { display: flex; align-items: center; gap: 10px; }
.topbar-icon { width: 32px; height: 32px; border-radius: 8px; }
.topbar-username { font-weight: 700; font-size: 1rem; }

.content {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 480px;
  margin: 0 auto;
  padding-bottom: 60px;
}

.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.section-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text2);
  margin-bottom: 12px;
}

/* DATE NAV */
.date-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
}

.nav-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  font-size: 1.6rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.1s;
  line-height: 1;
  padding-bottom: 2px;
}
.nav-btn:active { background: var(--bg); }

.date-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.date-display {
  font-size: 1.1rem;
  font-weight: 700;
  text-align: center;
}

.date-picker {
  background: transparent;
  border: none;
  color: var(--text2);
  font-size: 0.78rem;
  text-align: center;
  width: 130px;
  padding: 2px 4px;
  cursor: pointer;
  outline: none;
}

.date-picker::-webkit-calendar-picker-indicator { filter: invert(0.5); }

/* MEAL CARDS */
.meal-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.meal-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 12px;
}

.meal-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text2);
}

.meal-count {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text);
  transition: transform 0.08s;
}

.meal-count.bump { transform: scale(1.15); }

.meal-btns {
  display: flex;
  gap: 10px;
}

.meal-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  font-size: 1.6rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.08s, background 0.1s;
  line-height: 1;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.meal-btn:active { transform: scale(0.92); }

.meal-btn.plus { background: var(--accent); color: #fff; }
.meal-btn.plus:hover { background: var(--accent2); }
.meal-btn.minus { background: var(--bg3); color: var(--text); border: 1.5px solid var(--border); }
.meal-btn.minus:hover { border-color: var(--text2); }

/* TOTALS */
.totals-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}

.total-item {
  background: var(--bg3);
  border-radius: var(--radius-sm);
  padding: 10px 8px;
  text-align: center;
}

.total-label {
  font-size: 0.7rem;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.total-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
}

.total-value.highlight { color: var(--accent2); }

/* CALENDAR */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.cal-header {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text2);
  text-align: center;
  padding: 4px 0;
  text-transform: uppercase;
}

.cal-day {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  position: relative;
  background: var(--bg3);
  border: 1.5px solid transparent;
  transition: border-color 0.12s, background 0.12s;
  user-select: none;
  line-height: 1.2;
  padding: 2px;
}

.cal-day:empty { background: transparent; cursor: default; }
.cal-day.empty { background: transparent; cursor: default; border: none; }
.cal-day:not(.empty):active { transform: scale(0.93); }
.cal-day.has-meals { background: rgba(108,99,255,0.18); border-color: rgba(108,99,255,0.5); color: var(--accent2); }
.cal-day.selected { border-color: var(--accent2) !important; background: rgba(167,139,250,0.2) !important; }
.cal-day.today { font-weight: 800; }

.cal-badge {
  font-size: 0.58rem;
  font-weight: 700;
  color: var(--accent2);
  line-height: 1;
}

/* ACTIVITY LOG */
.activity-log {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 260px;
  overflow-y: auto;
}

.log-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: var(--bg3);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
}

.log-date { color: var(--text2); font-size: 0.75rem; flex-shrink: 0; }
.log-action { color: var(--text); flex: 1; }
.log-delta { font-weight: 700; font-size: 0.8rem; }
.log-delta.plus { color: var(--green); }
.log-delta.minus { color: var(--red); }
.log-delta.clear { color: var(--orange); }

.empty-state {
  text-align: center;
  color: var(--text2);
  padding: 20px;
  font-size: 0.9rem;
}

/* ACTIONS */
.actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 24px;
  border-radius: 40px;
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 9999;
  opacity: 1;
  transition: opacity 0.3s, transform 0.3s;
  white-space: nowrap;
  max-width: 90vw;
  text-overflow: ellipsis;
  overflow: hidden;
  pointer-events: none;
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}

.toast.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(16px);
  pointer-events: none;
}

.toast.success { border-color: var(--green); color: var(--green); }
.toast.error { border-color: var(--red); color: var(--red); }

/* FOOTER CREDIT */
.footer-credit {
  color: var(--text2);
  font-size: 0.75rem;
  text-align: center;
  margin-top: 16px;
  opacity: 0.6;
}

.main-footer {
  padding: 16px;
  margin-top: 0;
}