/* ── Design Tokens (Cal AI / Apple Inspired) ── */
:root {
  --bg:       #000000;
  --surface:  #121214;
  --surface-elevated: #1c1c1e;
  --border:   rgba(255,255,255,0.06);
  --border-bright: rgba(255,255,255,0.12);
  
  --text-primary: #ffffff;
  --text-secondary: #8e8e93;
  --text-tertiary: #48484a;

  /* Macro Accents */
  --protein:  #ff453a; /* iOS Red */
  --carbs:    #ff9f0a; /* iOS Orange */
  --fats:     #0a84ff; /* iOS Blue */
  --fiber:    #30d158; /* iOS Green */
  
  --accent:   #ffffff;
  --accent-invert: #000000;
  
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 12px;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { 
  box-sizing: border-box; 
  margin: 0; 
  padding: 0; 
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'SF Pro Display', 'Inter', -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* ── Container ── */
.app-container {
  width: 100%;
  max-width: 480px; /* Mobile-first limit */
  min-height: 100vh;
  background-color: var(--bg);
  display: flex;
  flex-direction: column;
  position: relative;
}

/* ── Header ── */
header {
  padding: 40px 24px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background-color: rgba(0,0,0,0.8);
  backdrop-filter: blur(20px);
  z-index: 100;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon { 
  
  font-size: 28px; }

.user-streak {
  background: var(--surface-elevated);
  padding: 8px 14px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--border);
}

/* ── Main Scroll Area ── */
main {
  flex: 1;
  padding: 0 20px 100px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ── Date Navigator ── */
.date-strip {
  display: flex;
  overflow-x: auto;
  gap: 12px;
  padding: 10px 24px 20px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.date-strip::-webkit-scrollbar { display: none; }

.date-item {
  min-width: 58px;
  height: 78px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-shrink: 0;
  transition: var(--transition);
  cursor: pointer;
}

.date-item.active {
  background: #ffffff;
  color: #000;
  border-color: #fff;
  transform: scale(1.05);
  box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

.date-day {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  opacity: 0.6;
}

.date-item.active .date-day { opacity: 0.8; }

.date-val {
  font-size: 18px;
  font-weight: 800;
}

/* ── Dashboard (Daily Stats) ── */
.dashboard {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
}

.main-ring-container {
  position: relative;
  width: 180px;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.main-ring-content {
  text-align: center;
  z-index: 2;
}

.calories-left-val {
  font-size: 42px;
  font-weight: 800;
  line-height: 1;
}

.calories-left-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 4px;
}

.ring-svg {
  position: absolute;
  top: 0;
  left: 0;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: var(--surface-elevated);
  stroke-width: 12;
}

.ring-progress {
  fill: none;
  stroke: #ffffff;
  stroke-width: 12;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s ease-out;
}

/* ── Macro Grid ── */
.macro-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
}

.macro-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
}

.macro-val {
  font-size: 16px;
  font-weight: 700;
}

.macro-label {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.macro-ring-mini {
  width: 40px;
  height: 40px;
  position: relative;
}

/* ── Upload Section ── */
.section-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.upload-card {
  background: var(--surface-elevated);
  border-radius: var(--radius-md);
  padding: 40px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  border: 1px dashed var(--border-bright);
  transition: var(--transition);
}

.upload-card:active { transform: scale(0.98); }

.upload-icon-circle {
  width: 64px;
  height: 64px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 8px;
}

.upload-label { font-size: 16px; font-weight: 600; }
.upload-sub { font-size: 13px; color: var(--text-secondary); }

#fileInput { display: none; }

#previewImg {
  width: 100%;
  border-radius: var(--radius-md);
  display: none;
  margin-top: 10px;
}

/* ── Result UI ── */
.result-container {
  display: none;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--border);
  animation: slideUp 0.4s ease-out;
  text-align: center;
}

.result-header {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-food-name { 
  font-size: 24px; 
  font-weight: 800; 
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.result-kcal { 
  font-size: 17px; 
  font-weight: 600; 
  color: var(--text-secondary);
}

.result-container .macro-grid {
  margin-bottom: 8px;
}

.result-container .macro-label {
  background: var(--surface-elevated);
  padding: 12px 6px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 13px;
  text-align: center;
  border: 1px solid var(--border);
  text-transform: none; /* Changed from uppercase for better readability in pills */
}

.pill-protein { border-left: 3px solid var(--protein) !important; color: var(--protein); }
.pill-carbs { border-left: 3px solid var(--carbs) !important; color: var(--carbs); }
.pill-fat { border-left: 3px solid var(--fats) !important; color: var(--fats); }

.add-btn {
  background: #ffffff;
  color: #000000;
  border: none;
  padding: 16px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 700;
  width: 100%;
  margin-top: 20px;
  cursor: pointer;
}

.reset-btn {
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
}

.reset-btn:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
}

/* ── Recent Activity ── */
.activity-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--border);
}

.activity-img {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  object-fit: cover;
  background: var(--surface-elevated);
}

.activity-info { flex: 1; }
.activity-name { font-size: 15px; font-weight: 600; }
.activity-meta { font-size: 12px; color: var(--text-secondary); }

.delete-entry-btn {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 8px;
  font-size: 14px;
  transition: var(--transition);
}

.delete-entry-btn:hover {
  color: var(--protein);
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-tertiary);
  font-size: 14px;
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border);
}

/* ── FAB / Tab Bar ── */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  background: rgba(18,18,20,0.8);
  backdrop-filter: blur(20px);
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  z-index: 200;
}

.tab-item {
  color: var(--text-tertiary);
  font-size: 24px;
  cursor: pointer;
}

.tab-item.active { color: var(--text-primary); }

.fab-upload {
  width: 56px;
  height: 56px;
  background: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #000;
  margin-top: -40px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.3);
  cursor: pointer;
}

/* ── Toast ── */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  color: #000;
  padding: 12px 24px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  z-index: 1000;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  animation: fadeInOut 3s forwards;
}

@keyframes fadeInOut {
  0% { opacity: 0; transform: translate(-50%, -10px); }
  10%, 90% { opacity: 1; transform: translate(-50%, 0); }
  100% { opacity: 0; transform: translate(-50%, -10px); }
}

/* ── Custom Loader ── */
.loader {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 40px 0;
}

.loader-spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }