/* ========================================
   Diet & Keep Analyzer - Main Stylesheet
   Premium Dark Theme with Glassmorphism
   ======================================== */

/* === CSS Variables === */
:root {
  /* Colors - Warm Notebook Style */
  --color-bg-primary: #fdfbf7;
  /* Creamy paper */
  --color-bg-secondary: #f4f0e6;
  /* Thick paper/Cardboard */
  --color-bg-tertiary: #ebe6da;
  /* Darker paper/Tape */
  --color-bg-glass: rgba(255, 255, 255, 0.65);
  /* Frosted tracing paper */

  --color-border: rgba(92, 85, 78, 0.15);
  /* Pencil grey/brown */
  --color-border-hover: rgba(92, 85, 78, 0.3);

  --color-text-primary: #382e28;
  /* Deep Coffee - Darker for contrast */
  --color-text-secondary: #6e5d50;
  /* Medium Brown */
  --color-text-muted: #948171;
  /* Readable Light Brown */

  /* Accents - Warm & Earthy */
  --color-accent-primary: #d97757;
  /* Terracotta Red */
  --color-accent-secondary: #c86b4e;
  --color-accent-gradient: linear-gradient(135deg, #d97757 0%, #e08e73 100%);

  --color-success: #6b8e23;
  /* Olive Green */
  --color-warning: #cd853f;
  /* Peru */
  --color-error: #cd5c5c;
  /* Indian Red */

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Border Radius - Slightly organic */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 26px;
  --radius-full: 9999px;

  /* Shadows - Soft & Warm */
  --shadow-sm: 0 2px 4px rgba(74, 62, 53, 0.05);
  --shadow-md: 0 4px 12px rgba(74, 62, 53, 0.08);
  --shadow-lg: 0 8px 24px rgba(74, 62, 53, 0.12);
  --shadow-glow: 0 0 15px rgba(217, 119, 87, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --sidebar-width: 280px;
  --panel-width: 400px;
  --header-height: 60px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Lora', 'Georgia', 'Microsoft YaHei', '微软雅黑', sans-serif;
  background: var(--color-bg-primary);
  background-image: url('bg_paper.png');
  background-repeat: repeat;
  background-size: 512px;
  /* Adjustable scale */
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Global Emoji Ink Filter - REMOVED (Replaced by Sticker/Stamp system) */
/* .brand-icon etc removed from here to specialized classes below */

/* === Notebook Decoration System (Image Based) === */

/* Base class for all hand-drawn icons */
.hand-icon {
  display: inline-block;
  vertical-align: middle;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}

/* 1. Stickers: Colorful, white border feel, shadow, slight chaotic rotation */
.icon-sticker {
  width: 24px;
  height: 24px;
  filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.15));
  transform: rotate(-3deg);
  transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.icon-sticker.lg {
  width: 32px;
  height: 32px;
}

.icon-sticker.xl {
  width: 48px;
  height: 48px;
}

.icon-sticker.xxl {
  width: 64px;
  height: 64px;
}

.icon-sticker:hover {
  transform: scale(1.15) rotate(4deg);
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.2));
}

/* 2. Stamps: Clean hand-drawn feel, original colors */
.icon-stamp {
  width: 20px;
  height: 20px;
  /* Removed heavy filters (sepia, multiply) to avoid 'dirty' look */
  /* Just slight opacity to blend nicely, but keep original colors */
  opacity: 0.9;
  transform: rotate(2deg);
  transition: all 0.2s ease;
}

.icon-stamp.lg {
  width: 24px;
  height: 24px;
}

.icon-stamp.xl {
  width: 64px;
  height: 64px;
}

.icon-stamp:hover {
  opacity: 1;
  transform: rotate(-2deg) scale(1.1);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* Specific Adjustments */
.brand-icon img {
  width: 32px;
  height: 32px;
}


/* Hand-drawn Checkbox */
input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-text-secondary);
  border-radius: 2px 5px 3px 4px;
  /* Organic box */
  background: transparent;
  cursor: pointer;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

input[type="checkbox"]:hover {
  border-color: var(--color-accent-primary);
}

input[type="checkbox"]:checked {
  border-color: var(--color-accent-primary);
}

input[type="checkbox"]:checked::after {
  content: '✓';
  font-family: 'Patrick Hand', cursive;
  font-size: 24px;
  color: var(--color-accent-primary);
  position: absolute;
  top: -12px;
  left: 2px;
  transform: rotate(-5deg);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(92, 85, 78, 0.2);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(92, 85, 78, 0.4);
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-secondary);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Lora', serif;
  font-weight: 500;
  line-height: 1.3;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

/* === Utility Classes === */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-success {
  color: var(--color-success);
}

.text-warning {
  color: var(--color-warning);
}

.text-error {
  color: var(--color-error);
}

.hidden {
  display: none !important;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

/* === Glassmorphism Card === */
/* === Glassmorphism Card (Paper Note Style) === */
.glass-card {
  background: var(--color-bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);

  /* Organic Touch */
  border-top-left-radius: 2px;
  border-bottom-right-radius: 2px;
  box-shadow: 2px 4px 12px rgba(74, 62, 53, 0.08);
  transform: rotate(-0.3deg);
  /* Subtle organic tilt */
}

/* Washi Tape Decoration (Top Center) */
.glass-card::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%) rotate(1.5deg);
  width: 80px;
  height: 24px;
  background: rgba(217, 119, 87, 0.3);
  /* Terracotta Tape */
  opacity: 0.6;
  z-index: 10;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  mask-image: url("data:image/svg+xml,%3Csvg width='100%25' height='100%25' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0,0 L100,0 L95,100 L5,100 Z' fill='black'/%3E%3C/svg%3E");
  /* Rough edge simulation (simple) */
}

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

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--color-accent-gradient);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

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

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  background: var(--color-bg-glass);
  color: var(--color-text-primary);
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
}

/* === Input Fields === */
.input-field {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  /* Ensure consistent font rendering */
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-field:focus {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(217, 119, 87, 0.2);
  outline: none;
}

.input-field::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
  /* Make placeholder visually lighter than input text */
}

textarea.input-field {
  resize: vertical;
  min-height: 100px;
}

/* === Login Page === */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  background:
    radial-gradient(ellipse at top, rgba(217, 119, 87, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(224, 142, 115, 0.1) 0%, transparent 50%),
    var(--color-bg-primary);
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: var(--spacing-2xl);
}

.login-logo {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  background: var(--color-accent-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.login-title {
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.login-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

.login-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* === Dashboard Layout === */
.dashboard {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-bg-secondary);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
}

.sidebar-brand-icon {
  width: 32px;
  height: 32px;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md);
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  margin-bottom: var(--spacing-xs);
}

.nav-item:hover,
.nav-item.active {
  background: var(--color-bg-glass);
  color: var(--color-text-primary);
}

.nav-item.active {
  background: rgba(217, 119, 87, 0.1);
  color: var(--color-accent-primary);
}

.sidebar-footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.main-header {
  height: var(--header-height);
  padding: 0 var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-bg-secondary);
}

.main-body {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* Chat Area */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.message {
  max-width: 80%;
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
}

.message.user {
  align-self: flex-end;
  background: var(--color-accent-gradient);
  color: white;
  border-bottom-right-radius: var(--radius-sm);
}

.message.assistant {
  align-self: flex-start;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: var(--radius-sm);
}

.chat-input-area {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.chat-input-wrapper {
  display: flex;
  gap: var(--spacing-sm);
  align-items: flex-end;
}

.chat-input {
  flex: 1;
  min-height: 48px;
  max-height: 200px;
  padding: var(--spacing-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-primary);
  font-size: 0.9375rem;
  resize: none;
  transition: border-color var(--transition-fast);
}

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

.chat-actions {
  display: flex;
  gap: var(--spacing-xs);
}

/* Side Panel */
.side-panel {
  width: var(--panel-width);
  background: var(--color-bg-secondary);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-header {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.panel-content {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--color-accent-primary);
  background: rgba(217, 119, 87, 0.05);
}

.upload-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-muted);
}

.upload-text {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.upload-text strong {
  color: var(--color-accent-primary);
}

/* Preview Images */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.preview-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.preview-remove {
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-xs);
  width: 24px;
  height: 24px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.75rem;
}

/* Result Card */
.result-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.result-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.result-icon {
  width: 32px;
  height: 32px;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-title {
  font-size: 0.875rem;
  font-weight: 600;
}

.result-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Loading States */
.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.skeleton {
  background: linear-gradient(90deg,
      var(--color-bg-tertiary) 0%,
      var(--color-bg-secondary) 50%,
      var(--color-bg-tertiary) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }

  100% {
    background-position: -200% 0;
  }
}

/* === Responsive === */
@media (max-width: 1024px) {
  .sidebar {
    position: fixed;
    left: -100%;
    top: 0;
    height: 100vh;
    z-index: 100;
    transition: left var(--transition-normal);
  }

  .sidebar.open {
    left: 0;
  }

  .side-panel {
    position: fixed;
    right: -100%;
    top: 0;
    height: 100vh;
    z-index: 100;
    transition: right var(--transition-normal);
  }

  .side-panel.open {
    right: 0;
  }
}

@media (max-width: 640px) {
  :root {
    --panel-width: 100%;
    --sidebar-width: 100%;
  }

  .login-card {
    padding: var(--spacing-lg);
  }

  .message {
    max-width: 90%;
  }
}

/* Profile specific inputs */
.profile-field-input {
  font-family: inherit;
  /* Critical for consistency */
  color: var(--color-text-primary);
}

/* Ensure select elements also inherit font */
select {
  font-family: inherit;
}