/* ============================================================
   ИллюстраторПро — Main Stylesheet
   ============================================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --primary: #4A1D96;
  --primary-light: #6D28D9;
  --primary-dark: #2D1058;
  --secondary: #FF6B35;
  --surface: #FFFFFF;
  --secondary-light: #FF8C5A;
  --secondary-dark: #E55520;
  --accent: #F59E0B;
  --accent-light: #FCD34D;

  --bg-primary: #FAFAFA;
  --bg-secondary: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-dark: #1A0533;
  --bg-purple-soft: #F5F3FF;

  --text-primary: #1A1A2E;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  --text-light: #FFFFFF;
  --text-on-primary: #FFFFFF;

  --border-color: #E5E7EB;
  --border-light: #F3F4F6;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(74,29,150,0.10), 0 2px 6px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 40px rgba(74,29,150,0.15), 0 4px 12px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(74,29,150,0.2), 0 8px 24px rgba(0,0,0,0.1);
  --shadow-card: 0 2px 12px rgba(74,29,150,0.08);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

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

  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;

  --header-height: 70px;
  --container-max: 1280px;
  --container-padding: 24px;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--text-primary);
}

p {
  line-height: 1.75;
}

/* --- Typography System --- */
.font-display { font-family: var(--font-display); }

.text-xs   { font-size: 0.75rem; }
.text-sm   { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg   { font-size: 1.125rem; }
.text-xl   { font-size: 1.25rem; }
.text-2xl  { font-size: 1.5rem; }
.text-3xl  { font-size: 1.875rem; }
.text-4xl  { font-size: 2.25rem; }
.text-5xl  { font-size: 3rem; }

.font-light    { font-weight: 300; }
.font-normal   { font-weight: 400; }
.font-medium   { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }
.font-extrabold{ font-weight: 800; }

.leading-tight  { line-height: 1.25; }
.leading-snug   { line-height: 1.375; }
.leading-normal { line-height: 1.5; }
.leading-relaxed{ line-height: 1.75; }

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.site-logo svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.site-logo span {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  background: var(--bg-purple-soft);
}

.header-cta {
  margin-left: 16px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.hamburger:hover {
  background: var(--bg-purple-soft);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 16px var(--container-padding);
  z-index: 999;
  box-shadow: var(--shadow-lg);
  flex-direction: column;
  gap: 4px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu .nav-link {
  display: block;
  padding: 12px 16px;
  font-size: 1rem;
  border-radius: var(--radius-md);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(74,29,150,0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(74,29,150,0.45);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255,107,53,0.35);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,107,53,0.45);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-ghost:hover {
  background: var(--bg-purple-soft);
  transform: translateY(-1px);
  color: var(--primary);
}

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

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-sm);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #F5F3FF 0%, #FFF7ED 50%, #FAFAFA 100%);
  padding: 64px 0 48px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(74,29,150,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,107,53,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 740px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(74,29,150,0.08);
  color: var(--primary);
  border: 1px solid rgba(74,29,150,0.15);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--secondary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 560px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.hero-stats {
  margin-top: 60px;
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.03em;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Section --- */
.section {
  padding: 56px 0;
}

.section-sm {
  padding: 48px 0;
}

.section-lg {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-label {
  display: inline-block;
  background: rgba(255,107,53,0.1);
  color: var(--secondary);
  border-radius: var(--radius-full);
  padding: 5px 14px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

/* --- Cards Grid --- */
.cards-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.cards-grid-2 {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(2, 1fr);
}

.cards-grid-3 {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(3, 1fr);
}

.cards-grid-4 {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(4, 1fr);
}

/* --- Tool Card --- */
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}

.tool-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
  color: inherit;
}

.tool-card:hover::before {
  transform: scaleX(1);
}

.tool-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}

.tool-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tool-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}

.tool-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: auto;
}

.tool-card-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.tool-card:hover .tool-card-link svg {
  transform: translateX(4px);
}

/* --- Feature Cards --- */
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all var(--transition-base);
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--bg-purple-soft);
}

.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* --- Article Cards --- */
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.article-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.article-card-image {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.article-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-card-category {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--secondary);
}

.article-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  text-decoration: none;
  display: block;
}

.article-card-title:hover {
  color: var(--primary);
}

.article-card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* --- SEO Text Block --- */
.seo-block {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: 48px;
  border: 1px solid var(--border-color);
}

.seo-block h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin-bottom: 16px;
  color: var(--primary);
}

.seo-block p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.seo-block p:last-child {
  margin-bottom: 0;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  padding: 16px 0;
  font-size: 0.85rem;
}

.breadcrumb-item {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.breadcrumb-item a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb-item a:hover {
  color: var(--primary);
}

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

.breadcrumb-separator {
  color: var(--border-color);
}

/* --- Article Page Styles --- */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}

.article-content {
  min-width: 0;
}

.article-header {
  margin-bottom: 40px;
}

.article-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 16px 0;
  color: var(--text-primary);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 40px 0 16px;
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 28px 0 12px;
}

.article-body p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 16px 0 20px 24px;
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-color: rgba(74,29,150,0.3);
}

.article-body a:hover {
  text-decoration-color: var(--primary);
}

.article-body blockquote {
  border-left: 4px solid var(--primary);
  padding: 16px 24px;
  background: var(--bg-purple-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
}

.article-body blockquote p {
  color: var(--primary);
  font-style: italic;
  font-size: 1.05rem;
  margin-bottom: 0;
}

.article-body .img-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--bg-purple-soft) 0%, #FFF7ED 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  margin: 28px 0;
  border: 1px solid var(--border-color);
}

/* --- Sidebar --- */
.article-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.sidebar-widget-title {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.related-article-link {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-fast);
}

.related-article-link:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.related-article-link:hover .related-title {
  color: var(--primary);
}

.related-thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.related-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  transition: color var(--transition-fast);
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 32px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .site-logo {
  margin-bottom: 16px;
}

.footer-brand .site-logo span {
  -webkit-text-fill-color: white;
  background: none;
  color: white;
}

.footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.footer-links a:hover {
  color: rgba(255,255,255,0.9);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copyright {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

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

.text-primary-color { color: var(--primary); }
.text-secondary-color { color: var(--secondary); }
.text-muted-color { color: var(--text-muted); }
.text-white  { color: #fff; }

.bg-purple { background: var(--bg-purple-soft); }
.bg-white  { background: var(--bg-secondary); }
.bg-dark   { background: var(--bg-dark); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-2  { gap: 8px; }
.gap-4  { gap: 16px; }
.gap-6  { gap: 24px; }
.gap-8  { gap: 32px; }

.mt-0  { margin-top: 0; }
.mt-4  { margin-top: 16px; }
.mt-6  { margin-top: 24px; }
.mt-8  { margin-top: 32px; }
.mb-0  { margin-bottom: 0; }
.mb-4  { margin-bottom: 16px; }
.mb-6  { margin-bottom: 24px; }
.mb-8  { margin-bottom: 32px; }

.p-4  { padding: 16px; }
.p-6  { padding: 24px; }
.p-8  { padding: 32px; }

.rounded     { border-radius: var(--radius-md); }
.rounded-lg  { border-radius: var(--radius-lg); }
.rounded-xl  { border-radius: var(--radius-xl); }
.rounded-full{ border-radius: var(--radius-full); }

.w-full { width: 100%; }
.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* --- Glassmorphism --- */
.glass {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.5);
}

.glass-dark {
  background: rgba(26,5,51,0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
}

/* --- Tag/Badge --- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-purple-soft);
  color: var(--primary);
}

.tag-orange {
  background: rgba(255,107,53,0.1);
  color: var(--secondary);
}

.tag-green {
  background: rgba(16,185,129,0.1);
  color: #059669;
}

/* --- Divider --- */
.divider {
  height: 1px;
  background: var(--border-color);
  border: none;
  margin: 0;
}

/* --- Reading Progress --- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
  z-index: 2000;
}

.reading-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  width: 0%;
  transition: width 0.1s linear;
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.animate-fade-in    { animation: fadeIn 0.5s ease forwards; }
.animate-slide-up   { animation: slideUp 0.6s ease forwards; }
.animate-scale-in   { animation: scaleIn 0.4s ease forwards; }
.animate-float      { animation: float 3s ease-in-out infinite; }

.anim-delay-1 { animation-delay: 0.1s; }
.anim-delay-2 { animation-delay: 0.2s; }
.anim-delay-3 { animation-delay: 0.3s; }
.anim-delay-4 { animation-delay: 0.4s; }

/* Scroll-triggered animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* --- Tools Hub Filter --- */
.tools-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.filter-btn {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  border: 2px solid var(--border-color);
  color: var(--text-secondary);
  background: var(--bg-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--bg-purple-soft);
}

.search-input-wrap {
  position: relative;
  max-width: 380px;
  width: 100%;
}

.search-input-wrap svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 18px;
  height: 18px;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 11px 16px 11px 44px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-secondary);
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(74,29,150,0.1);
  outline: none;
}

/* --- Tool page header --- */
.tool-page-hero {
  background: linear-gradient(135deg, var(--bg-purple-soft) 0%, #FFF7ED 100%);
  padding: 40px 0;
  border-bottom: 1px solid var(--border-color);
}

.tool-page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.tool-page-hero p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- Responsive Breakpoints --- */
@media (max-width: 1280px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .footer-grid > *:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 1024px) {
  :root {
    --container-padding: 20px;
  }

  .cards-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
  }

  .main-nav { display: none; }
  .header-cta { display: none; }
  .hamburger { display: flex; }

  .section { padding: 56px 0; }
  .section-lg { padding: 80px 0; }

  .hero { padding: 56px 0 72px; }

  .hero h1 { font-size: 2rem; }

  .hero-stats { gap: 28px; }

  .cards-grid,
  .cards-grid-2,
  .cards-grid-3,
  .cards-grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    gap: 12px;
  }

  .hero-cta .btn-lg {
    padding: 14px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .seo-block {
    padding: 28px 20px;
  }

  .section-header { margin-bottom: 36px; }
}

@media (max-width: 480px) {
  .btn-lg {
    padding: 12px 20px;
    font-size: 0.95rem;
  }

  .tool-card { padding: 20px; }
  .feature-card { padding: 24px; }
}