/* ============================================================
   СЛОВАРЬ МАРКЕТОЛОГА — Styles
   ============================================================ */

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

:root {
  --bg:          #07071a;
  --bg-2:        #0d0d2b;
  --card-bg:     rgba(255,255,255,0.04);
  --card-border: rgba(110,130,255,0.18);
  --card-hover:  rgba(110,130,255,0.08);

  --grad-1: #667eea;
  --grad-2: #764ba2;
  --grad-3: #f093fb;
  --grad-4: #4facfe;

  --accent:  #7c83fa;
  --accent2: #f093fb;
  --green:   #43e97b;

  --text:    #e8e8ff;
  --text-60: rgba(232,232,255,0.6);
  --text-40: rgba(232,232,255,0.4);

  --header-h: 68px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 32px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 24px rgba(102,126,234,0.25);

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.28s cubic-bezier(0.4,0,0.2,1);
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--grad-3); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

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

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: 20px;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position:  200% center; }
}

@keyframes float1 {
  0%,100% { transform: translateY(0px) rotate(0deg); }
  30%     { transform: translateY(-9px) rotate(1.2deg); }
  70%     { transform: translateY(-4px) rotate(-0.8deg); }
}
@keyframes float2 {
  0%,100% { transform: translateY(0px) rotate(0deg); }
  40%     { transform: translateY(-13px) rotate(-1.5deg); }
  80%     { transform: translateY(-6px) rotate(1deg); }
}
@keyframes float3 {
  0%,100% { transform: translateY(0px) rotate(0deg); }
  50%     { transform: translateY(-7px) rotate(2deg); }
}
@keyframes float4 {
  0%,100% { transform: translateY(0px) rotate(0deg); }
  25%     { transform: translateY(-11px) rotate(-1deg); }
  75%     { transform: translateY(-5px) rotate(1.8deg); }
}

@keyframes particleDrift {
  0%   { transform: translateY(0) translateX(0) scale(1); opacity: 0; }
  10%  { opacity: 0.6; }
  90%  { opacity: 0.3; }
  100% { transform: translateY(-110vh) translateX(60px) scale(0.4); opacity: 0; }
}

@keyframes pulseRing {
  0%   { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.8); opacity: 0; }
}

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

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

@keyframes cardReveal {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ============================================================
   HEADER
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(7,7,26,0.88);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid rgba(110,130,255,0.12);
}

.header-inner {
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: 20px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text) !important;
  font-size: 1.05rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}
.logo-icon { font-size: 1.4rem; }
.logo-text strong { color: var(--accent); }

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-wrap: wrap;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-60) !important;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--text) !important;
  background: rgba(110,130,255,0.12);
}
.nav-link--accent {
  background: linear-gradient(135deg, rgba(102,126,234,0.2), rgba(240,147,251,0.15));
  border: 1px solid rgba(240,147,251,0.25);
  color: var(--grad-3) !important;
}
.nav-link--accent:hover {
  background: linear-gradient(135deg, rgba(102,126,234,0.35), rgba(240,147,251,0.3));
  color: #fff !important;
  box-shadow: 0 0 16px rgba(240,147,251,0.3);
}
.nav-icon { font-size: 1rem; }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}
.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  position: relative;
  overflow: hidden;
  padding: 80px 20px 70px;
  background: radial-gradient(ellipse at 50% 0%, rgba(102,126,234,0.18) 0%, transparent 65%),
              radial-gradient(ellipse at 85% 60%, rgba(240,147,251,0.1) 0%, transparent 50%),
              var(--bg-2);
  text-align: center;
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-particles .particle {
  position: absolute;
  bottom: -20px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: particleDrift linear infinite;
  opacity: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin-inline: auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-40);
  margin-bottom: 24px;
}
.breadcrumb a { color: var(--text-40); }
.breadcrumb a:hover { color: var(--accent); }

.hero-title {
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  animation: fadeInUp 0.7s both;
}

.gradient-text {
  background: linear-gradient(135deg, var(--grad-4), var(--grad-1), var(--grad-3));
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 4s linear infinite, fadeInUp 0.7s both;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-60);
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: 36px;
  animation: fadeInUp 0.7s 0.12s both;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 40px;
  animation: fadeInUp 0.7s 0.22s both;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-inline: 28px;
}
.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--grad-4), var(--grad-1));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-40);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 44px;
  background: rgba(110,130,255,0.2);
}

/* ---- Search ---- */
.search-box {
  position: relative;
  max-width: 560px;
  margin-inline: auto;
  animation: fadeInUp 0.7s 0.3s both;
}
.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  pointer-events: none;
  z-index: 1;
}
.search-input {
  width: 100%;
  padding: 16px 50px 16px 52px;
  border-radius: 50px;
  border: 1.5px solid rgba(110,130,255,0.3);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font);
  backdrop-filter: blur(8px);
  transition: all var(--transition);
  outline: none;
}
.search-input::placeholder { color: var(--text-40); }
.search-input:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,0.09);
  box-shadow: 0 0 0 4px rgba(124,131,250,0.15), var(--shadow-glow);
}
.search-clear {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.12);
  border: none;
  color: var(--text-60);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.search-clear:hover { background: rgba(255,255,255,0.22); color: var(--text); }

/* ============================================================
   ALPHABET NAV
   ============================================================ */

.alphabet-wrap {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  background: rgba(7,7,26,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(110,130,255,0.1);
  padding: 10px 20px;
}

.alphabet-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: center;
  max-width: 1240px;
  margin-inline: auto;
}

.alpha-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding-inline: 8px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-60);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
}
.alpha-btn:hover {
  background: rgba(110,130,255,0.15);
  color: var(--text);
  border-color: rgba(110,130,255,0.3);
}
.alpha-btn.active {
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 14px rgba(102,126,234,0.45);
  transform: scale(1.1);
}
.alpha-btn.has-terms {
  color: var(--text);
}
.alpha-btn:disabled {
  opacity: 0.25;
  cursor: default;
  pointer-events: none;
}
.alpha-sep {
  display: inline-block;
  width: 1px;
  height: 22px;
  background: rgba(110,130,255,0.3);
  margin-inline: 6px;
  vertical-align: middle;
  border-radius: 2px;
}

/* ============================================================
   TERMS SECTION
   ============================================================ */

.terms-section {
  padding: 40px 0 60px;
  min-height: 300px;
}

.terms-meta {
  font-size: 0.85rem;
  color: var(--text-40);
  margin-bottom: 20px;
  padding-inline: 4px;
  animation: fadeIn 0.3s both;
}

/* ---- Letter Divider ---- */
.letter-group { margin-bottom: 12px; }

.letter-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding-top: 16px;
}
.letter-divider-text {
  font-size: 2.4rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  min-width: 50px;
}
.letter-divider-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(102,126,234,0.4), transparent);
}
.letter-count {
  font-size: 0.78rem;
  color: var(--text-40);
  white-space: nowrap;
}

/* ---- Terms Grid ---- */
.terms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 540px), 1fr));
  gap: 16px;
}

/* ---- Term Card ---- */
.term-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  opacity: 0;
  animation: cardReveal 0.5s forwards;
}
.term-card:hover {
  border-color: rgba(110,130,255,0.4);
  box-shadow: var(--shadow-glow), var(--shadow);
  transform: translateY(-2px);
}

.term-card-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 22px 22px 18px;
  cursor: pointer;
  user-select: none;
  position: relative;
}
.term-card-header:hover .term-name { color: var(--accent2); }

.term-letter-badge {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(102,126,234,0.25), rgba(118,75,162,0.2));
  border: 1px solid rgba(102,126,234,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--accent);
  flex-shrink: 0;
  transition: all var(--transition);
}
.term-card:hover .term-letter-badge,
.term-card.expanded .term-letter-badge {
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 14px rgba(102,126,234,0.4);
}

.term-header-content { flex: 1; min-width: 0; }

.term-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  transition: color var(--transition);
  line-height: 1.3;
  margin-bottom: 6px;
}

.term-short-def {
  font-size: 0.9rem;
  color: var(--text-60);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.term-card.expanded .term-short-def {
  -webkit-line-clamp: unset;
  overflow: visible;
}

.term-toggle {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(110,130,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.75rem;
  transition: all var(--transition);
  margin-top: 4px;
}
.term-card.expanded .term-toggle {
  transform: rotate(180deg);
  background: rgba(110,130,255,0.2);
}

/* ---- Expandable Details ---- */
.term-details {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.38s cubic-bezier(0.4,0,0.2,1);
}
.term-card.expanded .term-details {
  grid-template-rows: 1fr;
}
.term-details-inner {
  overflow: hidden;
}
.term-details-content {
  padding: 0 22px 22px;
  border-top: 1px solid rgba(110,130,255,0.1);
  padding-top: 18px;
  display: grid;
  gap: 14px;
}

.detail-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 0.9rem;
}

.detail-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-40);
  white-space: nowrap;
  padding-top: 2px;
}

.detail-value { color: var(--text-60); line-height: 1.6; }

.detail-row.detail--extended .detail-value { color: var(--text); }
.detail-row.detail--example .detail-value {
  color: var(--text-60);
  padding: 10px 14px;
  background: rgba(79,172,254,0.08);
  border-left: 3px solid var(--grad-4);
  border-radius: 0 8px 8px 0;
}
.detail-row.detail--additional .detail-value {
  color: var(--accent2);
  font-style: italic;
}

.usage-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.usage-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  background: rgba(67,233,123,0.1);
  border: 1px solid rgba(67,233,123,0.25);
  color: var(--green);
}

/* ---- No Results ---- */
.no-results {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-40);
}
.no-results-icon { font-size: 3rem; display: block; margin-bottom: 16px; }

/* ============================================================
   SSR/SEO FALLBACK LIST (скрывается после загрузки JS)
   ============================================================ */

.seo-term-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.seo-term-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(110,130,255,0.12);
  border-radius: 12px;
  padding: 14px 18px;
}
.seo-term-item dt {
  font-weight: 700;
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 4px;
}
.seo-term-item dd {
  color: var(--text-60);
  font-size: 0.88rem;
  margin: 0;
  line-height: 1.5;
}

/* ============================================================
   SEO H2 (visible but subtle)
   ============================================================ */

.section-heading-seo {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-40);
  margin: 0 0 0.75rem;
  letter-spacing: 0.01em;
}

/* ============================================================
   FAQ SECTION
   ============================================================ */

.faq-section {
  padding: 60px 0 70px;
  border-top: 1px solid rgba(110,130,255,0.1);
  background: radial-gradient(ellipse at 30% 60%, rgba(118,75,162,0.06) 0%, transparent 60%);
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(110,130,255,0.15);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition);
}
.faq-item[open] {
  background: rgba(110,130,255,0.06);
  border-color: rgba(110,130,255,0.35);
}
.faq-item[open] .faq-question::after {
  transform: rotate(180deg);
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color var(--transition);
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: '›';
  flex-shrink: 0;
  font-size: 1.3rem;
  color: var(--grad-1);
  transition: transform 0.25s ease;
  transform: rotate(90deg);
}
.faq-item:hover .faq-question {
  color: var(--grad-1);
}
.faq-answer {
  padding: 0 22px 18px;
  color: var(--text-60);
  font-size: 0.93rem;
  line-height: 1.7;
}
.faq-answer p { margin: 0; }

@media (max-width: 600px) {
  .faq-question { padding: 14px 16px; font-size: 0.93rem; }
  .faq-answer   { padding: 0 16px 14px; }
}

/* ============================================================
   TAG CLOUD
   ============================================================ */

.tag-cloud-section {
  padding: 60px 0 70px;
  background: radial-gradient(ellipse at 50% 50%, rgba(102,126,234,0.07) 0%, transparent 70%);
  border-top: 1px solid rgba(110,130,255,0.1);
}

.section-title {
  text-align: center;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  margin-bottom: 36px;
  background: linear-gradient(135deg, var(--grad-4), var(--grad-1), var(--grad-3));
  background-size: 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 5s linear infinite;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  max-width: 900px;
  margin-inline: auto;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  border: 1.5px solid;
  transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  position: relative;
  white-space: nowrap;
  overflow: hidden;
}
.tag-item::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s;
  border-radius: inherit;
}
.tag-item:hover::before { opacity: 1; }
.tag-item:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 8px 28px rgba(0,0,0,0.4);
}

/* Tag color variants */
.tag-item:nth-child(8n+1) {
  color: #7c83fa; border-color: rgba(124,131,250,0.4);
  background: rgba(124,131,250,0.08);
  animation: float1 4.2s ease-in-out infinite;
}
.tag-item:nth-child(8n+1)::before { background: rgba(124,131,250,0.12); }
.tag-item:nth-child(8n+1):hover { color: #fff; border-color: #7c83fa; box-shadow: 0 8px 28px rgba(124,131,250,0.4); }

.tag-item:nth-child(8n+2) {
  color: #f093fb; border-color: rgba(240,147,251,0.4);
  background: rgba(240,147,251,0.08);
  animation: float2 5.1s ease-in-out 0.4s infinite;
}
.tag-item:nth-child(8n+2)::before { background: rgba(240,147,251,0.12); }
.tag-item:nth-child(8n+2):hover { color: #fff; border-color: #f093fb; box-shadow: 0 8px 28px rgba(240,147,251,0.4); }

.tag-item:nth-child(8n+3) {
  color: #4facfe; border-color: rgba(79,172,254,0.4);
  background: rgba(79,172,254,0.08);
  animation: float3 3.8s ease-in-out 0.8s infinite;
}
.tag-item:nth-child(8n+3)::before { background: rgba(79,172,254,0.12); }
.tag-item:nth-child(8n+3):hover { color: #fff; border-color: #4facfe; box-shadow: 0 8px 28px rgba(79,172,254,0.4); }

.tag-item:nth-child(8n+4) {
  color: #43e97b; border-color: rgba(67,233,123,0.4);
  background: rgba(67,233,123,0.08);
  animation: float4 4.7s ease-in-out 1.2s infinite;
}
.tag-item:nth-child(8n+4)::before { background: rgba(67,233,123,0.12); }
.tag-item:nth-child(8n+4):hover { color: #fff; border-color: #43e97b; box-shadow: 0 8px 28px rgba(67,233,123,0.4); }

.tag-item:nth-child(8n+5) {
  color: #fa8231; border-color: rgba(250,130,49,0.4);
  background: rgba(250,130,49,0.08);
  animation: float2 4.4s ease-in-out 1.6s infinite;
}
.tag-item:nth-child(8n+5)::before { background: rgba(250,130,49,0.12); }
.tag-item:nth-child(8n+5):hover { color: #fff; border-color: #fa8231; box-shadow: 0 8px 28px rgba(250,130,49,0.4); }

.tag-item:nth-child(8n+6) {
  color: #fd9644; border-color: rgba(253,150,68,0.4);
  background: rgba(253,150,68,0.08);
  animation: float1 5.5s ease-in-out 2s infinite;
}
.tag-item:nth-child(8n+7) {
  color: #a55eea; border-color: rgba(165,94,234,0.4);
  background: rgba(165,94,234,0.08);
  animation: float3 4.9s ease-in-out 0.6s infinite;
}
.tag-item:nth-child(8n+8) {
  color: #26de81; border-color: rgba(38,222,129,0.4);
  background: rgba(38,222,129,0.08);
  animation: float4 3.6s ease-in-out 1.4s infinite;
}

.tag-emoji { font-size: 1rem; }

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  background: linear-gradient(180deg, var(--bg-2) 0%, #04040f 100%);
  border-top: 1px solid rgba(110,130,255,0.1);
  padding: 60px 0 0;
}

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

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text) !important;
  margin-bottom: 18px;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--text-40);
  line-height: 1.7;
}

.footer-heading {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-40);
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 0.875rem;
  color: var(--text-60);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-links a:hover { color: var(--accent); padding-left: 4px; }

.footer-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 12px 16px;
  background: rgba(110,130,255,0.08);
  border: 1px solid rgba(110,130,255,0.15);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-60);
}
.footer-badge strong { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid rgba(110,130,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-40);
}
.footer-bottom a { color: var(--text-40); }
.footer-bottom a:hover { color: var(--accent); }

/* ============================================================
   SCROLL TO TOP
   ============================================================ */

.scroll-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  border: none;
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(102,126,234,0.5);
}
.scroll-top.visible {
  opacity: 1;
  transform: translateY(0);
}
.scroll-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(102,126,234,0.6);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 900px) {
  .header-nav { display: none; flex-direction: column; }
  .header-nav.open {
    display: flex;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(7,7,26,0.98);
    padding: 16px;
    border-bottom: 1px solid rgba(110,130,255,0.15);
    backdrop-filter: blur(20px);
    animation: slideInLeft 0.25s both;
    z-index: 99;
  }
  .burger { display: flex; }
  .logo-text { display: none; }

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

@media (max-width: 640px) {
  .hero { padding: 52px 16px 48px; }
  .hero-stats { gap: 0; }
  .stat-item { padding-inline: 14px; }
  .stat-number { font-size: 1.7rem; }

  .terms-grid {
    grid-template-columns: 1fr;
  }

  .detail-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .alphabet-nav { gap: 3px; }
  .alpha-btn { min-width: 30px; height: 30px; font-size: 0.82rem; }

  .tag-cloud { gap: 8px; }
  .tag-item { padding: 8px 14px; font-size: 0.8rem; }

  .scroll-top { bottom: 16px; right: 16px; width: 42px; height: 42px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}