/**
 * Sanscorpu - Mobile-First CSS
 */

/* CSS Variables */
:root {
  /* Colors */
  --primary: #4CAF50;
  --primary-dark: #388E3C;
  --primary-light: #C8E6C9;
  --secondary: #FF9800;
  --secondary-dark: #F57C00;
  --error: #F44336;
  --warning: #FFC107;
  --success: #4CAF50;

  /* Neutrals */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F5;
  --bg-card: #FFFFFF;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-hint: #9E9E9E;
  --border: #E0E0E0;
  --divider: #EEEEEE;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-xxl: 32px;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);

  /* Layout */
  --nav-height: 56px;
  --bottom-nav-height: 64px;
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
}

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

html {
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  min-height: 100vh;
  padding-bottom: calc(var(--bottom-nav-height) + var(--safe-area-bottom));
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
}

h1 { font-size: var(--font-size-xxl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

/* Container */
.container {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Page Header */
.page-header {
  background: var(--bg-primary);
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.page-header h1 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.card-title {
  font-size: var(--font-size-md);
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 44px;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:active {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-full);
}

.btn-block {
  width: 100%;
}

/* Floating Action Button */
.fab {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + var(--spacing-md) + var(--safe-area-bottom));
  right: var(--spacing-md);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: white;
  box-shadow: var(--shadow-lg);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

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

.fab svg {
  width: 24px;
  height: 24px;
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  transition: border-color 0.2s ease;
  min-height: 44px;
}

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

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23757575' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-sm) center;
  background-size: 20px;
  padding-right: var(--spacing-xl);
}

/* Nutrition Display */
.nutrition-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-sm);
  text-align: center;
}

.nutrition-item {
  padding: var(--spacing-sm);
}

.nutrition-value {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.nutrition-label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  text-transform: uppercase;
}

.nutrition-item.kcal .nutrition-value {
  color: var(--secondary);
}

.nutrition-item.protein .nutrition-value {
  color: #E91E63;
}

.nutrition-item.carbs .nutrition-value {
  color: #2196F3;
}

.nutrition-item.fat .nutrition-value {
  color: #9C27B0;
}

/* Progress Bar */
.progress-bar {
  height: 8px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-top: var(--spacing-xs);
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: var(--radius-sm);
  transition: width 0.3s ease;
}

.progress-bar-fill.warning {
  background: var(--warning);
}

.progress-bar-fill.over {
  background: var(--error);
}

/* Meal List */
.meal-section {
  margin-bottom: var(--spacing-md);
}

.meal-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-transform: uppercase;
}

.meal-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* Meal Card */
.meal-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.meal-card-image {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.meal-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.meal-card-content {
  flex: 1;
  min-width: 0;
}

.meal-card-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.meal-card-meta {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.meal-card-kcal {
  font-weight: 600;
  color: var(--secondary);
  white-space: nowrap;
}

/* Scanner */
.scanner-container {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 400px;
  margin: 0 auto;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.scanner-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scanner-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.scanner-frame {
  width: 70%;
  height: 40%;
  border: 2px solid var(--primary);
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 9999px rgba(0,0,0,0.5);
}

.scanner-line {
  position: absolute;
  width: 70%;
  height: 2px;
  background: var(--primary);
  animation: scan 2s ease-in-out infinite;
}

@keyframes scan {
  0%, 100% { top: 30%; }
  50% { top: 70%; }
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--bottom-nav-height) + var(--safe-area-bottom));
  padding-bottom: var(--safe-area-bottom);
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 1000;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: var(--spacing-xs);
  min-width: 40px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 10px;
  transition: color 0.2s ease;
}

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

.nav-item svg {
  width: 18px;
  height: 18px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: var(--spacing-lg);
  padding-bottom: calc(var(--spacing-lg) + var(--safe-area-bottom));
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.modal-overlay.open .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  padding: var(--spacing-sm);
  cursor: pointer;
  color: var(--text-secondary);
}

/* Loading Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  color: var(--text-hint);
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

/* Toast */
.toast {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + var(--spacing-md) + var(--safe-area-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 3000;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Page Transitions */
.page {
  display: none;
  animation: fadeIn 0.2s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.p-md { padding: var(--spacing-md); }
.hidden { display: none !important; }

/* Responsive - Tablet and up */
@media (min-width: 600px) {
  :root {
    --spacing-md: 20px;
    --spacing-lg: 32px;
  }

  body {
    padding-bottom: 0;
  }

  .bottom-nav {
    position: static;
    border-top: none;
    border-bottom: 1px solid var(--border);
    height: var(--nav-height);
    padding-bottom: 0;
  }

  .nav-item {
    flex-direction: row;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
  }

  .modal-content {
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    max-height: 80vh;
  }
}