/* ========== Reset & Tokens ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  /* Colors */
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-text: #0b1220;
  --color-subtext: #475467;
  --color-border: #e5e7eb;

  --color-primary: #2b5cff;
  --color-primary-hover: #244ae0;
  --color-success: #12b76a;
  --color-danger: #d92d20;
  --color-warning: #f79009;

  /* Elevation */
  --shadow-1: 0 1px 2px rgba(16,24,40,.06);
  --shadow-2: 0 8px 24px rgba(16,24,40,.08);

  /* Radii */
  --radius-1: 6px;
  --radius-2: 10px;
  --radius-3: 14px;

  /* Spacing (4px baseline) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;

  /* Typography */
  --font-s: 12px;
  --font-m: 14px;
  --font-l: 16px;
  --font-xl: 20px;
  --font-2xl: 24px;
  --font-3xl: 28px;

  /* Motion */
  --ease: cubic-bezier(.2,.8,.2,1);
  --t: 160ms;
}
.dark {
  --color-bg: #0f1420;
  --color-surface: #121826;
  --color-text: #eef2f7;
  --color-subtext: #9aa4b2;
  --color-border: #1f2937;
  --shadow-1: 0 1px 2px rgba(0,0,0,.5);
  --shadow-2: 0 18px 50px rgba(0,0,0,.55);
}

/* Global */
html, body {
  height: 100%;
}
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", Segoe UI, Roboto, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding: var(--space-6);
}

/* Utilities */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px; padding:0; margin:-1px; overflow:hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.mt-3 { margin-top: var(--space-6); }
.input-compact { width: 120px; }
.inline { display: inline-flex; align-items: center; gap: var(--space-2); }

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  background: var(--color-surface);
  border-radius: var(--radius-3);
  box-shadow: var(--shadow-2);
  overflow: hidden;
}

/* Header */
.header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
  padding: var(--space-8);
}
.header h1 {
  font-size: 2rem;
  margin-bottom: var(--space-2);
}
.header p {
  color: var(--color-subtext);
  font-size: var(--font-m);
}

/* Upload */
.upload-section {
  padding: var(--space-8);
  background: #fafbfc;
  border-bottom: 1px solid var(--color-border);
}
.upload-area {
  border: 2px dashed var(--color-primary);
  border-radius: var(--radius-2);
  padding: var(--space-10);
  text-align: center;
  background: var(--color-surface);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease), transform var(--t) var(--ease);
  cursor: pointer;
}
.upload-area:hover {
  border-color: var(--color-primary-hover);
  background: #f3f6ff;
}
.upload-area.dragover {
  border-color: var(--color-success);
  background: #effaf3;
}
.upload-icon {
  font-size: 2.2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.upload-area h3 {
  font-size: var(--font-xl);
  margin-bottom: var(--space-1);
}
.help-text {
  font-size: 12px;
  color: var(--color-subtext);
  margin-top: var(--space-2);
}

/* Controls (Sticky) */
.controls {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(1.1) blur(6px);
  background: color-mix(in oklab, var(--color-surface) 85%, transparent);
  padding: var(--space-6) var(--space-8);
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
}
.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.control-group label {
  font-weight: 600;
  color: var(--color-subtext);
  font-size: 0.9em;
}
select, input, textarea {
  padding: 8px 12px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-2);
  font-size: 14px;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
select:focus, input:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 20%, transparent);
}

/* Buttons */
.btn {
  padding: 10px 14px;
  border: none;
  border-radius: var(--radius-2);
  cursor: pointer;
  font-weight: 600;
  transition: transform var(--t) var(--ease), background var(--t) var(--ease), color var(--t) var(--ease), border-color var(--t) var(--ease);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 14px;
  line-height: 1;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-success {
  background: var(--color-success);
  color: #fff;
}
.btn-success:hover { filter: brightness(0.95); }

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}
.btn-danger:hover { filter: brightness(0.95); }

.btn-secondary {
  background: #6b7280;
  color: #fff;
}
.btn-secondary:hover { filter: brightness(0.95); }

.btn-outline {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-outline:hover { background: #f3f6ff; }

/* AI Settings */
.ai-settings {
  padding: var(--space-6) var(--space-8);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.ai-settings h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-2);
  color: #111827;
}
.ai-form-row {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: flex-end;
}
.ai-input-group {
  display: flex;
  flex-direction: column;
  min-width: 240px;
  flex: 1;
}
.ai-input-group label {
  font-weight: 600;
  color: var(--color-subtext);
  font-size: 0.85em;
  margin-bottom: 4px;
}
.ai-input-group .inline { width: 100%; }
.ai-actions {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  flex-wrap: wrap;
}
.help-text { font-size: 12px; color: var(--color-subtext); margin-top: var(--space-2); }

/* Stats */
.stats {
  padding: var(--space-6) var(--space-8);
  background: #fafbfc;
  display: flex;
  justify-content: space-around;
  text-align: center;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.stat-item { display: flex; flex-direction: column; gap: var(--space-1); }
.stat-number { font-size: 1.8rem; font-weight: 800; color: var(--color-primary); }
.stat-label { color: var(--color-subtext); font-size: 0.9em; }

/* Grid & Cards */
.dish-grid {
  padding: var(--space-8);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
  background: var(--color-surface);
}
.dish-card {
  background: var(--color-surface);
  border-radius: var(--radius-3);
  overflow: hidden;
  box-shadow: var(--shadow-1);
  transition: box-shadow var(--t) var(--ease), transform var(--t) var(--ease);
  border: 1px solid var(--color-border);
  cursor: pointer;
}
.dish-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
}
.dish-image {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  background: #f1f5f9;
  display: block;
  transition: opacity var(--t) var(--ease), filter var(--t) var(--ease);
}
.dish-image[data-loading="true"] {
  opacity: 0.6;
  filter: saturate(0.8);
  background: linear-gradient(90deg, #eef1f5 25%, #e6eaf0 37%, #eef1f5 63%);
  background-size: 400% 100%;
  animation: shimmer 1.2s infinite;
}
@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: 0 0; }
}
.dish-info { padding: var(--space-5); }
.dish-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: var(--space-2);
}
.dish-category {
  display: inline-block;
  background: #eef4ff;
  color: #1d4ed8;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  margin-bottom: var(--space-2);
}
.dish-price {
  font-size: 1.25rem;
  font-weight: 800;
  color: #e11d48;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 30px;
  color: var(--color-subtext);
}
.empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

/* Notifications */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 16px;
  border-radius: var(--radius-2);
  color: #fff;
  font-weight: 700;
  z-index: 2000;
  transform: translateX(400px);
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease);
  box-shadow: var(--shadow-2);
  opacity: 0.95;
}
.notification.show { transform: translateX(0); }
.notification.success { background: var(--color-success); }
.notification.error { background: var(--color-danger); }

/* Chat Floating */
.chat-toggle {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: var(--shadow-2);
  z-index: 1500;
  cursor: pointer;
  border: none;
  transition: background var(--t) var(--ease), transform var(--t) var(--ease);
}
.chat-toggle:hover { background: var(--color-primary-hover); transform: translateY(-2px); }

.chat-panel {
  position: fixed;
  right: 24px;
  bottom: 90px;
  width: 360px;
  max-height: 70vh;
  background: var(--color-surface);
  border-radius: var(--radius-2);
  box-shadow: var(--shadow-2);
  display: none;
  flex-direction: column;
  overflow: hidden;
  z-index: 1500;
  border: 1px solid var(--color-border);
}
.chat-panel.open { display: flex; }
.chat-header {
  background: #f8fafc;
  padding: 12px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
}
.chat-header .title { font-weight: 700; color: #111827; }
.chat-header .close-btn {
  background: transparent; border: none; font-size: 20px; cursor: pointer; color: var(--color-subtext);
}
.chat-messages {
  padding: 12px;
  overflow-y: auto;
  flex: 1;
  background: var(--color-surface);
}
.chat-message { margin-bottom: 10px; display: flex; gap: 8px; }
.chat-message .bubble {
  padding: 10px 12px;
  border-radius: 10px;
  max-width: 80%;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 14px;
  line-height: 1.4;
}
.chat-message.user { justify-content: flex-end; }
.chat-message.user .bubble {
  background: #e7efff;
  color: #0b3ab7;
  border-top-right-radius: 4px;
}
.chat-message.assistant .bubble {
  background: #f2f4f7;
  color: var(--color-text);
  border-top-left-radius: 4px;
}
.chat-input {
  padding: 10px;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}
.chat-input .row { display: flex; gap: 8px; }
.chat-input textarea { resize: none; height: 60px; flex: 1; }
.chat-input .footer {
  margin-top: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.toggle {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  font-size: 12px;
  color: var(--color-subtext);
}

/* Modal (moved from inline style) */
.modal-open { overflow: hidden; }
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: none;
  z-index: 3000;
}
.modal-overlay.show { display: block; }
.modal {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-surface);
  width: min(92vw, 720px);
  max-height: 85vh;
  border-radius: var(--radius-3);
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  overflow: hidden;
  display: none;
  z-index: 3001;
}
.modal.show { display: flex; flex-direction: column; }
.modal-close {
  position: absolute;
  right: 10px;
  top: 8px;
  background: transparent;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--color-subtext);
}
.modal-close:hover { color: #111827; }
.detail-image {
  width: 100%;
  height: 320px;
  object-fit: cover;
  background: #f1f5f9;
}
.detail-body { padding: 16px 18px 20px; }
.detail-name { font-size: 1.4rem; color: #111827; margin-bottom: 8px; }
.detail-rows {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 6px;
}
.detail-row { display: flex; align-items: baseline; gap: 10px; }
.detail-row .label {
  flex: 0 0 64px;
  color: var(--color-subtext);
  font-size: 0.9em;
}
.detail-row .value { flex: 1; color: var(--color-text); word-break: break-word; }
.detail-desc { color: #475467; line-height: 1.6; white-space: pre-wrap; }

/* Responsive */
@media (max-width: 768px) {
  body { padding: var(--space-3); }
  .controls {
    flex-direction: column;
    align-items: stretch;
    position: sticky;
  }
  .dish-grid { grid-template-columns: 1fr; padding: var(--space-6); }
  .stats { flex-direction: column; gap: var(--space-4); }
  .chat-panel { right: 12px; left: 12px; width: auto; }
  .detail-image { height: 220px; }
  .modal {
    width: 100vw; height: 100vh; max-height: none; border-radius: 0;
  }
}