/* ============================================
   DESIGN SYSTEM — Tools Website
   Aesthetic: Clean utilitarian with warm accents
   ============================================ */

:root {
  /* Colors */
  --bg-primary: #0F1117;
  --bg-secondary: #181B25;
  --bg-card: #1E2130;
  --bg-tool: #232738;
  --bg-input: #191D2B;
  --border: #2A2E3F;
  --border-focus: #5B8DEF;
  --text-primary: #E8ECF4;
  --text-secondary: #8B92A8;
  --text-muted: #5A6178;
  --accent: #5B8DEF;
  --accent-active: #2563EB;
  --accent-hover: #7BA4FF;
  --accent-glow: rgba(91, 141, 239, 0.15);
  --success: #4ADE80;
  --warning: #FBBF24;
  --error: #F87171;
  --gradient-accent: linear-gradient(135deg, #5B8DEF 0%, #8B5CF6 100%);

  /* Typography */
  --font-display: 'DM Sans', 'DM Sans Fallback', sans-serif;
  --font-body: 'DM Sans', 'DM Sans Fallback', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px var(--accent-glow);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }

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

/* ---- Layout ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow { max-width: 800px; }

/* ---- CLS prevention: reserve space for auth slot so header doesn't shift ---- */
#auth-header-slot { min-width: 86px; }

/* ---- Screen-reader-only utility ---- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---- Fallback font with metrics tuned to match DM Sans (reduces font-swap CLS) ---- */
@font-face {
  font-family: 'DM Sans Fallback';
  src: local('Arial');
  size-adjust: 100%;
  ascent-override: 95%;
  descent-override: 25%;
  line-gap-override: 0%;
}

/* ---- Header ---- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-md) 0;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.header__logo svg { width: 28px; height: 28px; }

.header__logo span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header__nav { display: flex; align-items: center; gap: var(--space-lg); }

.header__nav a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.header__nav a:hover, .header__nav a.active { color: var(--text-primary); }

.lang-switch {
  display: flex;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}

.lang-switch a {
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.lang-switch a.active {
  background: var(--accent-active);
  color: #fff;
}

/* ---- Hero ---- */
.hero {
  padding: var(--space-3xl) 0 var(--space-2xl);
  text-align: center;
}

.hero__badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--accent-glow);
  border: 1px solid rgba(91,141,239,0.3);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--space-md);
}

.hero h1 em {
  font-style: normal;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto var(--space-xl);
}

/* ---- Search ---- */
.search-box {
  max-width: 500px;
  margin: 0 auto;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 14px 20px 14px 48px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font-body);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box input:focus {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
}

.search-box input::placeholder { color: var(--text-muted); }

.search-box svg {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--text-muted);
}

/* ---- Category Tabs ---- */
.categories {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
  padding: var(--space-lg) 0;
}

.cat-tab {
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: all 0.2s;
  user-select: none;
}

.cat-tab:hover { border-color: var(--accent); color: var(--text-primary); }
.cat-tab.active { background: var(--accent-active); color: #fff; border-color: var(--accent-active); }

/* ---- Tool Cards Grid ---- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-lg) 0 var(--space-3xl);
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all 0.25s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.25s;
}

.tool-card:hover {
  border-color: rgba(91,141,239,0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.tool-card:hover::before { opacity: 1; }

.tool-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 1.4rem;
}

.tool-card__title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.tool-card__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.tool-card__tag {
  display: inline-block;
  margin-top: var(--space-md);
  padding: 2px 10px;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tag--text { background: rgba(74,222,128,0.12); color: var(--success); }
.tag--code { background: rgba(91,141,239,0.12); color: var(--accent); }
.tag--image { background: rgba(251,191,36,0.12); color: var(--warning); }
.tag--gen { background: rgba(139,92,246,0.12); color: #A78BFA; }
.tag--convert { background: rgba(248,113,113,0.12); color: var(--error); }
.tag--ai { background: linear-gradient(135deg, rgba(91,141,239,0.2), rgba(139,92,246,0.2)); color: #C4B5FD; }

/* ---- Tool Page Layout ---- */
.tool-page { padding: var(--space-2xl) 0; }

.tool-page__header {
  margin-bottom: var(--space-xl);
}

.tool-page__breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

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

.tool-page__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

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

/* Tool workspace */
.tool-workspace {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.tool-workspace textarea,
.tool-workspace input[type="text"],
.tool-workspace input[type="number"],
.tool-workspace select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
  resize: vertical;
}

.tool-workspace textarea:focus,
.tool-workspace input:focus,
.tool-workspace select:focus {
  border-color: var(--border-focus);
}

.tool-workspace textarea { min-height: 140px; line-height: 1.6; }

.tool-workspace label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tool-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.tool-col { display: flex; flex-direction: column; gap: var(--space-sm); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 22px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn--primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(91,141,239,0.3);
}

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(91,141,239,0.4);
}

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

.btn--secondary:hover { border-color: var(--accent); color: var(--text-primary); }

.btn--sm { padding: 6px 14px; font-size: 0.8rem; }

.btn-row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin: var(--space-md) 0;
}

/* Tool output */
.tool-output {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  min-height: 100px;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--text-primary);
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  font-family: var(--font-body);
  transition: all 0.2s;
}

.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.copy-btn.copied { background: var(--success); color: #000; border-color: var(--success); }

/* Stats bar */
.stats-bar {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border);
  margin-top: var(--space-md);
}

.stat { display: flex; flex-direction: column; }
.stat__label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat__value { font-size: 1.1rem; font-weight: 700; font-family: var(--font-mono); color: var(--accent); }

/* ---- Info Section (SEO content) ---- */
.info-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.info-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.info-section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: var(--space-lg) 0 var(--space-sm);
  color: var(--text-primary);
}

.info-section p {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.7;
}

.info-section ul {
  list-style: none;
  padding: 0;
}

.info-section ul li {
  padding: 6px 0 6px 20px;
  position: relative;
  color: var(--text-secondary);
}

.info-section ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ---- Related Tools ---- */
.related-tools {
  margin-top: var(--space-xl);
}

.related-tools h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.related-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
}

.related-item:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.related-item span { font-size: 1.2rem; }

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-2xl) 0 var(--space-xl);
  margin-top: var(--space-3xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-xl);
}

.footer__brand p { color: var(--text-secondary); font-size: 0.85rem; margin-top: var(--space-sm); max-width: 280px; }

.footer__col h4,
.footer__col h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.footer__col a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 3px 0;
  transition: color 0.2s;
}

.footer__col a:hover { color: var(--text-primary); }

.footer__bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* ---- Animations ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeInUp 0.4s ease both; }
.fade-in-d1 { animation-delay: 0.1s; }
.fade-in-d2 { animation-delay: 0.2s; }
.fade-in-d3 { animation-delay: 0.3s; }

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-card);
  border: 1px solid var(--success);
  color: var(--success);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 1000;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s;
  pointer-events: none;
}

.toast.show { opacity: 1; transform: translateY(0); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .tool-row { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .header__nav { display: none; }
  .stats-bar { gap: var(--space-md); flex-wrap: wrap; }
  .container { padding: 0 var(--space-md); }
}

@media (max-width: 480px) {
  .footer__grid { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
}

/* Performance: disable expensive blur on mobile */
@media (max-width: 768px) {
  .header { backdrop-filter: none; background: rgba(15, 17, 23, 0.97); }
}

/* ============================================
   BLOG SYSTEM
   ============================================ */

/* ---- Blog listing page ---- */
.blog-hero {
  padding: var(--space-3xl) 0 var(--space-2xl);
  text-align: center;
}

.blog-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: var(--space-md);
}

.blog-hero h1 em {
  font-style: normal;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-xl);
  padding: var(--space-xl) 0 var(--space-3xl);
}

.blog-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
}

.blog-card:hover {
  border-color: rgba(91,141,239,0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.blog-card__cover {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  position: relative;
  overflow: hidden;
}

.blog-card__cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(30,33,48,0.9) 100%);
}

.blog-card__body { padding: var(--space-lg); flex: 1; display: flex; flex-direction: column; }

.blog-card__cat {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.blog-card__title {
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.blog-card__excerpt {
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  margin-bottom: var(--space-md);
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.78rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: var(--space-md);
}

.blog-card__meta span { display: flex; align-items: center; gap: 4px; }

/* ---- Article page ---- */
.article-page { padding: var(--space-2xl) 0 var(--space-3xl); }

.article-breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
}

.article-breadcrumb a { color: var(--text-secondary); }
.article-breadcrumb a:hover { color: var(--accent); }

.article-header { margin-bottom: var(--space-xl); }

.article-cat {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(91,141,239,0.3);
  border-radius: 50px;
  padding: 4px 12px;
  margin-bottom: var(--space-md);
}

.article-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.article-meta span { display: flex; align-items: center; gap: 6px; }

.article-cover {
  height: 220px;
  background: var(--gradient-accent);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  margin-bottom: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.article-cover::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(91,141,239,0.3) 0%, rgba(139,92,246,0.3) 100%);
}

/* Article body typography */
.article-body { line-height: 1.8; color: var(--text-secondary); }

.article-body h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-2xl) 0 var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}

.article-body h2:first-child { border-top: none; margin-top: 0; padding-top: 0; }

.article-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--space-xl) 0 var(--space-sm);
}

.article-body p { margin-bottom: var(--space-md); }

.article-body ul, .article-body ol {
  margin: var(--space-md) 0 var(--space-lg) var(--space-xl);
}

.article-body li { margin-bottom: var(--space-sm); }

.article-body a { color: var(--accent); font-weight: 500; }
.article-body a:hover { color: var(--accent-hover); }

.article-body strong { color: var(--text-primary); font-weight: 600; }

.article-body .callout {
  background: var(--accent-glow);
  border: 1px solid rgba(91,141,239,0.3);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  color: var(--text-primary);
}

.article-body .tool-link-box {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-md) 0;
  text-decoration: none;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.article-body .tool-link-box:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.article-body .tool-link-box .tlb-icon { font-size: 1.8rem; flex-shrink: 0; }
.article-body .tool-link-box .tlb-text strong { display: block; color: var(--text-primary); font-size: 0.95rem; }
.article-body .tool-link-box .tlb-text span { font-size: 0.82rem; }
.article-body .tool-link-box .tlb-arrow { margin-left: auto; color: var(--accent); font-size: 1.2rem; flex-shrink: 0; }

/* Article sidebar (related articles) */
.article-related-posts {
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border);
}

.article-related-posts h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}

.article-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-md);
}

.article-related-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.2s;
}

.article-related-item:hover { border-color: var(--accent); }

.article-related-item .ari-icon { font-size: 1.5rem; flex-shrink: 0; }

.article-related-item .ari-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

.article-related-item .ari-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Blog CTA block */
.blog-cta {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-2xl);
  text-align: center;
  margin: var(--space-2xl) 0;
}

.blog-cta h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: var(--space-sm); }
.blog-cta p { color: var(--text-secondary); margin-bottom: var(--space-lg); }

@media (max-width: 768px) {
  .blog-grid { grid-template-columns: 1fr; }
  .article-related-grid { grid-template-columns: 1fr; }
  .article-meta { flex-wrap: wrap; gap: var(--space-sm); }
}

/* ============================================
   AUTH SYSTEM — Modal, Forms, User Button
   ============================================ */

/* Header auth button */
.auth-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all 0.2s;
  white-space: nowrap;
}
.auth-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.auth-btn--user {
  border-color: var(--border);
  color: var(--text-primary);
  background: var(--bg-card);
  position: relative;
}
.auth-btn--user:hover { border-color: var(--accent); }
.auth-btn .auth-avatar {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700; color: #fff;
}

/* User dropdown */
.auth-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 240px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  padding: var(--space-md);
  display: none;
}
.auth-dropdown.open { display: block; }
.auth-dropdown__email {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.auth-dropdown__credits {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; color: var(--text-muted);
  margin-bottom: var(--space-md);
}
.auth-credits-bar {
  flex: 1; height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.auth-credits-bar__fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 2px;
  transition: width 0.3s;
}
.auth-dropdown__badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}
.auth-dropdown__badge--free { background: var(--bg-tool); color: var(--text-muted); }
.auth-dropdown__badge--premium { background: linear-gradient(135deg,#f59e0b,#d97706); color: #fff; }
.auth-dropdown__logout {
  width: 100%;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}
.auth-dropdown__logout:hover { border-color: var(--error); color: var(--error); }

/* Modal overlay */
.auth-modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 500;
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-lg);
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s;
}
.auth-modal-overlay.open { opacity: 1; pointer-events: all; }

/* Modal box */
.auth-modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 420px;
  padding: var(--space-2xl);
  box-shadow: var(--shadow-lg);
  transform: translateY(16px);
  transition: transform 0.25s;
}
.auth-modal-overlay.open .auth-modal { transform: translateY(0); }

.auth-modal__logo {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-sm);
  font-weight: 700; font-size: 1.2rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-xl);
}

.auth-modal__tabs {
  display: flex;
  background: var(--bg-tool);
  border-radius: var(--radius-md);
  padding: 3px;
  margin-bottom: var(--space-xl);
}
.auth-modal__tab {
  flex: 1; padding: 8px;
  border: none; background: transparent;
  color: var(--text-muted);
  font-size: 0.9rem; font-weight: 600;
  cursor: pointer;
  border-radius: calc(var(--radius-md) - 3px);
  transition: all 0.2s;
}
.auth-modal__tab.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.auth-form { display: flex; flex-direction: column; gap: var(--space-md); }

.auth-form__field { display: flex; flex-direction: column; gap: 6px; }
.auth-form__label { font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); }
.auth-form__input {
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color 0.2s;
  width: 100%;
}
.auth-form__input:focus { outline: none; border-color: var(--border-focus); }
.auth-form__input.error { border-color: var(--error); }

.auth-form__error {
  font-size: 0.8rem;
  color: var(--error);
  min-height: 18px;
}

.auth-form__submit {
  width: 100%;
  padding: 12px;
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
  margin-top: var(--space-sm);
}
.auth-form__submit:hover { opacity: 0.9; }
.auth-form__submit:active { transform: scale(0.98); }
.auth-form__submit:disabled { opacity: 0.5; cursor: not-allowed; }

.auth-modal__close {
  position: absolute;
  top: var(--space-md); right: var(--space-md);
  width: 32px; height: 32px;
  border: none; background: transparent;
  color: var(--text-muted); font-size: 1.2rem;
  cursor: pointer; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  transition: color 0.2s, background 0.2s;
}
.auth-modal__close:hover { background: var(--bg-tool); color: var(--text-primary); }
.auth-modal { position: relative; }

.auth-form__hint {
  font-size: 0.8rem; color: var(--text-muted); text-align: center;
}
.auth-form__hint a { color: var(--accent); cursor: pointer; }

@media (max-width: 600px) {
  .auth-modal { padding: var(--space-xl) var(--space-lg); }
  .auth-btn span { display: none; }
}

/* ---- Recently Viewed Tools ---- */
#recentToolsSection {
  margin-bottom: var(--space-lg);
}

.recent-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: var(--space-sm);
}

.recent-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.recent-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.18s;
}

.recent-item:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  background: var(--accent-glow);
}

.recent-item__icon { font-size: 0.9rem; }