/* Clean Light Theme & Minimalist Wellness Design System */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --bg-app: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --border-subtle: #e2e8f0;
  --border-focus: #10b981;
  
  --primary: #10b981;
  --primary-hover: #059669;
  --primary-light: #ecfdf5;
  --primary-text: #065f46;

  --accent-blue: #3b82f6;
  --accent-blue-light: #eff6ff;
  --accent-amber: #f59e0b;
  --accent-amber-light: #fffbeb;
  --accent-pink: #ec4899;
  --accent-pink-light: #fdf2f8;
  --accent-purple: #8b5cf6;
  --accent-purple-light: #f5f3ff;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.08), 0 4px 8px -2px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 24px rgba(16, 185, 129, 0.25);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* App Header & Navigation */
.app-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.75rem 1.5rem;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon-wrapper {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
}

.nav-tabs {
  display: flex;
  align-items: center;
  background: var(--bg-card-subtle);
  padding: 0.25rem;
  border-radius: var(--radius-full);
  gap: 0.25rem;
}

.nav-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-tab-btn:hover {
  color: var(--text-main);
}

.nav-tab-btn.active {
  background: white;
  color: var(--primary-text);
  box-shadow: var(--shadow-sm);
}

/* Main Layout Container */
.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

/* Cards & Panels */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.card-hover:hover {
  box-shadow: var(--shadow-md);
}

/* Voice & Text Logging Hero */
.voice-hero-card {
  background: linear-gradient(145deg, #ffffff 0%, #f0fdf4 100%);
  border: 1px solid #d1fae5;
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
}

.voice-record-btn {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.35);
  transition: all 0.25s ease;
  position: relative;
}

.voice-record-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 22px rgba(16, 185, 129, 0.45);
}

.voice-record-btn.recording {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
  animation: pulse-recording 1.5s infinite;
}

@keyframes pulse-recording {
  0% {
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    transform: scale(1);
  }
  70% {
    box-shadow: 0 0 0 16px rgba(239, 68, 68, 0);
    transform: scale(1.06);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    transform: scale(1);
  }
}

/* Quick Examples Tag Chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg-card-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all 0.15s ease;
}

.chip:hover {
  background: var(--primary-light);
  color: var(--primary-text);
  border-color: #a7f3d0;
}

/* Input Fields */
.text-area-input {
  width: 100%;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  color: var(--text-main);
  background: white;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  resize: none;
}

.text-area-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

/* Primary Action Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

.btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: white;
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--bg-card-subtle);
  border-color: #cbd5e1;
}

/* Nutrient Breakdown Mini Bar */
.nutrient-bar-track {
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--bg-card-subtle);
  overflow: hidden;
  position: relative;
}

.nutrient-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Calendar styling */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
}

.calendar-day-cell {
  min-height: 70px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: white;
  padding: 0.4rem 0.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: all 0.2s ease;
}

.calendar-day-cell:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.calendar-day-cell.active-day {
  border-color: var(--primary);
  background: var(--primary-light);
  font-weight: 700;
}

.calendar-day-cell.has-data {
  border-color: #cbd5e1;
}

/* Modal Window */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: white;
  border-radius: var(--radius-lg);
  max-width: 540px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform 0.25s ease;
  padding: 1.75rem;
}

.modal-backdrop.open .modal-card {
  transform: scale(1);
}

/* Utility classes */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.725rem;
  font-weight: 600;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .app-header {
    padding: 0.6rem 1rem;
  }
  .nav-tab-btn span.tab-label {
    display: none;
  }
  .main-content {
    padding: 1rem 0.75rem 5rem;
  }
  .calendar-day-cell {
    min-height: 52px;
    padding: 0.25rem;
  }
}