/* ============================================
   BAKING WEIGHTS — Design System
   Domain: baking-weights.com
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Playfair+Display:wght@700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Colors - Warm Baking Palette */
  --color-primary: #c2410c;        /* warm orange-red */
  --color-primary-light: #ea580c;
  --color-primary-dark: #9a3412;
  --color-primary-bg: #fff7ed;
  --color-accent: #d97706;         /* amber */
  --color-accent-light: #fbbf24;

  /* Neutrals */
  --color-bg: #fefce8;             /* warm cream */
  --color-bg-alt: #ffffff;
  --color-surface: #ffffff;
  --color-surface-hover: #fffbeb;
  --color-border: #e5e0d5;
  --color-border-light: #f0ebe3;
  --color-text: #292524;
  --color-text-secondary: #78716c;
  --color-text-muted: #a8a29e;

  /* Semantic */
  --color-success: #16a34a;
  --color-info: #2563eb;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.10);
  --shadow-glow: 0 0 40px rgba(194, 65, 12, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --max-width: 720px;
  --max-width-wide: 960px;
  --header-height: 64px;
}

/* --- Dark Mode --- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1c1917;
    --color-bg-alt: #292524;
    --color-surface: #292524;
    --color-surface-hover: #44403c;
    --color-border: #44403c;
    --color-border-light: #3a3633;
    --color-text: #fafaf9;
    --color-text-secondary: #a8a29e;
    --color-text-muted: #78716c;
    --color-primary-bg: #431407;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
    --shadow-glow: 0 0 40px rgba(234, 88, 12, 0.15);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

img { max-width: 100%; height: auto; display: block; }

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(254, 252, 232, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgba(28, 25, 23, 0.85);
  }
}

.header-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.site-logo:hover { color: var(--color-primary); text-decoration: none; }
.site-logo .logo-icon { font-size: 1.5rem; }

.header-nav {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  flex-wrap: wrap;
}

.header-nav a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.header-nav a:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  text-decoration: none;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  max-width: var(--max-width);
  margin: var(--space-md) auto 0;
  padding: 0 var(--space-lg);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.breadcrumbs a { color: var(--color-text-secondary); }
.breadcrumbs span { margin: 0 var(--space-xs); }

/* --- Main Content --- */
.page-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-3xl);
}

/* --- Result Box (Hero) --- */
.result-hero {
  background: linear-gradient(135deg, var(--color-primary-bg), var(--color-surface));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  margin: var(--space-xl) 0;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.result-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 30%, rgba(194, 65, 12, 0.04), transparent 60%);
  pointer-events: none;
}

.result-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}

.result-number {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: var(--space-xs);
}

.result-unit {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.result-equation {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
  font-size: 1rem;
  color: var(--color-text-secondary);
}

.result-equation strong {
  color: var(--color-text);
}

/* --- Calculator Section --- */
.calculator-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin: var(--space-xl) 0;
  box-shadow: var(--shadow-md);
}

.calculator-section h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.calc-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.calc-input {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  width: 100px;
  text-align: center;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
  outline: none;
}

.calc-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(194, 65, 12, 0.1);
}

.calc-label {
  font-size: 1rem;
  color: var(--color-text-secondary);
}

.calc-result {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary-bg);
  border-radius: var(--radius-md);
  display: inline-block;
}

/* --- Conversion Table --- */
.conversion-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 0.95rem;
}

.conversion-table thead th {
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 2px solid var(--color-border);
}

.conversion-table tbody td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
}

.conversion-table tbody tr:hover {
  background: var(--color-surface-hover);
}

.conversion-table tbody tr.current-row {
  background: var(--color-primary-bg);
  font-weight: 600;
}

.conversion-table tbody tr.current-row td:first-child::before {
  content: '→ ';
  color: var(--color-primary);
}

/* --- Content Sections --- */
.content-section {
  margin: var(--space-2xl) 0;
}

.content-section h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.content-section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: var(--space-lg) 0 var(--space-sm);
  color: var(--color-text);
}

.content-section p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

/* --- Tip Box --- */
.tip-box {
  background: linear-gradient(135deg, #fef3c7, #fffbeb);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  font-size: 0.92rem;
}

@media (prefers-color-scheme: dark) {
  .tip-box {
    background: linear-gradient(135deg, #451a03, #292524);
  }
}

.tip-box strong {
  color: var(--color-accent);
}

/* --- FAQ Section --- */
.faq-section { margin: var(--space-2xl) 0; }

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  overflow: hidden;
  background: var(--color-surface);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--color-surface-hover);
}

.faq-question::after {
  content: '+';
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 var(--space-lg) var(--space-md);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

/* --- Related Links Grid --- */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.related-link {
  display: block;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.related-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--color-primary);
}

.related-link .related-grams {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--space-xs);
}

/* --- Index Page: Hero --- */
.index-hero {
  text-align: center;
  padding: var(--space-3xl) 0;
}

.index-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.index-hero .subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 500px;
  margin: 0 auto var(--space-xl);
}

/* --- Search Box --- */
.search-box {
  max-width: 500px;
  margin: 0 auto var(--space-2xl);
  position: relative;
}

.search-input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: var(--space-md) var(--space-lg);
  padding-left: 3rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md), 0 0 0 3px rgba(194, 65, 12, 0.08);
}

.search-icon {
  position: absolute;
  left: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: 1.1rem;
  pointer-events: none;
}

.search-results {
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-height: 300px;
  overflow-y: auto;
  display: none;
  z-index: 50;
}

.search-results.active { display: block; }

.search-result-item {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.9rem;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--transition-fast);
}

.search-result-item:hover {
  background: var(--color-primary-bg);
  text-decoration: none;
}

/* --- Category Cards --- */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.category-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  text-decoration: none;
}

.category-icon {
  font-size: 2.2rem;
  margin-bottom: var(--space-md);
}

.category-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.category-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.category-count {
  margin-top: var(--space-md);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Popular Grid (Index) --- */
.popular-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.popular-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.popular-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

/* --- Category Page --- */
.category-header {
  margin-bottom: var(--space-2xl);
}

.category-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: var(--space-sm);
}

.category-header .icon { font-size: 2rem; margin-right: var(--space-sm); }

.ingredient-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.ingredient-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-fast);
}

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

.ingredient-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  text-transform: capitalize;
}

.ingredient-card .density {
  font-size: 0.88rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.ingredient-card .quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.ingredient-card .quick-link {
  font-size: 0.75rem;
  padding: 2px 8px;
  background: var(--color-primary-bg);
  border-radius: var(--radius-full);
  color: var(--color-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.ingredient-card .quick-link:hover {
  background: var(--color-primary);
  color: white;
  text-decoration: none;
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) var(--space-lg);
  margin-top: var(--space-3xl);
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* --- Page H1 --- */
.page-h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-sm);
}

/* --- Ad Container --- */
.ad-container {
  margin: var(--space-xl) 0;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .header-nav { display: none; }
  .page-content { padding: var(--space-lg) var(--space-md) var(--space-2xl); }
  .result-hero { padding: var(--space-xl) var(--space-md); }
  .calc-row { flex-direction: column; align-items: flex-start; }
  .categories-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .popular-grid { grid-template-columns: repeat(2, 1fr); }
  .ingredient-list { grid-template-columns: 1fr; }
}

/* --- Print Styles --- */
@media print {
  .site-header, .site-footer, .ad-container, .calculator-section,
  .related-grid, .header-nav, .search-box { display: none !important; }
  .result-hero { box-shadow: none; border: 2px solid #333; }
  body { background: white; color: black; }
  a { color: black; text-decoration: underline; }
}

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-hero { animation: fadeInUp 0.5s var(--transition-slow) both; }
.calculator-section { animation: fadeInUp 0.5s 0.1s var(--transition-slow) both; }