:root {
  --font-base: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --text-xs: 0.694rem;
  --text-sm: 0.833rem;
  --text-md: 1rem;
  --text-lg: 1.2rem;
  --text-xl: 1.44rem;
  --text-2xl: 1.728rem;
  --text-3xl: 2.488rem;
  --weight-light: 300;
  --weight-reg: 400;
  --weight-med: 500;
  --weight-bold: 700;
  --leading-tight: 1.15;
  --leading-body: 1.6;
  --leading-loose: 1.8;
  --color-bg: #07161C;
  --color-surface: #0C1F28;
  --color-ink: #ECF7F5;
  --color-ink-muted: #98B6BF;
  --color-border: #18414D;
  --color-accent: #25D69A;
  --color-tag-bg: #11323E;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(37, 214, 154, 0.16), transparent 34%),
    radial-gradient(circle at top right, rgba(43, 123, 255, 0.16), transparent 30%),
    linear-gradient(180deg, #08171D 0%, #07161C 55%, #061118 100%);
  color: var(--color-ink);
  font-family: var(--font-base);
  font-size: var(--text-md);
  font-weight: var(--weight-reg);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.45), transparent 85%);
  opacity: 0.5;
}

button,
input,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
}

.page-wrapper {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem) 5rem;
}

.site-header {
  padding-top: 2rem;
  margin-bottom: 2.5rem;
}

.hero-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}

.hero-copy {
  background: linear-gradient(180deg, rgba(12, 31, 40, 0.92), rgba(8, 23, 30, 0.88));
  border: 1px solid var(--color-border);
  padding: 1.6rem 1.6rem 1.8rem;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hero-copy::after {
  content: '';
  position: absolute;
  inset: auto -18% -42% auto;
  width: 16rem;
  height: 16rem;
  background: radial-gradient(circle, rgba(37, 214, 154, 0.25), transparent 68%);
  filter: blur(8px);
  z-index: -1;
  animation: floatGlow 8s ease-in-out infinite;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.hero-kicker::before {
  content: '';
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 999px;
  background: var(--color-accent);
  box-shadow: 0 0 0 0 rgba(37, 214, 154, 0.6);
  animation: pulseDot 2.4s ease-out infinite;
}

.page-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 3.7rem);
  font-weight: 700;
  line-height: 0.96;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.page-subtitle {
  margin: 0.7rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.9vw, 1.55rem);
  font-weight: 400;
  line-height: var(--leading-tight);
  color: var(--color-ink-muted);
  max-width: 28rem;
}

.page-meta {
  margin: 1.2rem 0 0;
  font-size: var(--text-sm);
  font-weight: var(--weight-reg);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.8rem;
  align-content: start;
}

.stat-card {
  background: linear-gradient(180deg, rgba(17, 50, 62, 0.96), rgba(12, 31, 40, 0.95));
  border: 1px solid var(--color-border);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 8.5rem;
  animation: riseIn 0.7s ease both;
}

.stat-value {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.2vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--color-ink);
}

.stat-label {
  margin-top: 0.55rem;
  font-size: var(--text-xs);
  font-weight: var(--weight-med);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
  margin-top: 2rem;
}

.section-heading h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-heading p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  max-width: 34rem;
}

.header-bottom-rule {
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), rgba(37, 214, 154, 0.35), rgba(43, 123, 255, 0.35));
  margin-top: 1.4rem;
}

.filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.7rem;
  padding-top: 0.4rem;
}

.filter-btn {
  border: 1px solid var(--color-border);
  background: rgba(12, 31, 40, 0.82);
  color: var(--color-ink-muted);
  padding: 0.46rem 1rem;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.filter-btn:hover:not(.active) {
  transform: translateY(-1px);
  border-color: rgba(37, 214, 154, 0.7);
  color: var(--color-ink);
  box-shadow: 0 0 0 1px rgba(37, 214, 154, 0.15) inset;
}

.filter-btn.active {
  background: linear-gradient(135deg, rgba(37, 214, 154, 0.92), rgba(43, 123, 255, 0.8));
  border-color: transparent;
  color: #041014;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.24);
}

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.glossary-card {
  background: linear-gradient(180deg, rgba(12, 31, 40, 0.97), rgba(8, 23, 30, 0.95));
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.22);
  transform: translateY(12px);
  opacity: 0;
  animation: riseCard 0.72s ease forwards;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.glossary-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 214, 154, 0.55);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.3);
}

.card-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(37, 214, 154, 0.18), rgba(43, 123, 255, 0.14));
}

.card-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 20%, rgba(7, 22, 28, 0.68) 100%);
  pointer-events: none;
}

.card-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1.08) contrast(1.02) brightness(0.88);
  transform: scale(1.02);
  transition: transform 0.6s ease, filter 0.6s ease;
}

.glossary-card:hover .card-photo {
  transform: scale(1.08);
  filter: saturate(1.12) contrast(1.04) brightness(0.96);
}

.card-body {
  padding: 1.3rem 1.3rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  flex: 1;
}

.card-topline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.card-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 0.22rem 0.6rem;
  background: var(--color-tag-bg);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card-number {
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.14em;
}

.card-emoji {
  display: block;
  margin-top: 0.25rem;
  font-size: var(--text-xl);
  line-height: 1;
}

.card-title {
  margin: 0;
  font-size: clamp(1.15rem, 2.3vw, 1.65rem);
  line-height: var(--leading-tight);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-family: var(--font-display);
  max-width: 13ch;
}

.card-definition {
  margin: 0.2rem 0 0;
  font-size: var(--text-md);
  line-height: var(--leading-body);
  color: rgba(236, 247, 245, 0.92);
}

.card-footer {
  margin-top: auto;
  padding: 0 1.3rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.card-link:hover {
  color: #7af5cf;
  transform: translateX(2px);
}

.card-like {
  border: 1px solid rgba(152, 182, 191, 0.35);
  background: rgba(8, 23, 30, 0.78);
  color: var(--color-ink-muted);
  padding: 0.5rem 0.7rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card-like:hover {
  transform: translateY(-1px);
  border-color: rgba(37, 214, 154, 0.72);
  color: var(--color-ink);
}

.card-like.is-liked {
  background: linear-gradient(135deg, rgba(37, 214, 154, 0.95), rgba(43, 123, 255, 0.75));
  border-color: transparent;
  color: #031116;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
}

.like-icon {
  font-size: 1rem;
  line-height: 1;
  transition: transform 0.2s ease;
}

.card-like.is-liked .like-icon {
  animation: heartPop 0.42s ease;
}

.site-footer {
  margin-top: 5rem;
  padding: 1.9rem 0 0;
  border-top: 1px solid rgba(152, 182, 191, 0.28);
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

@keyframes riseCard {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes riseIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes floatGlow {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50% { transform: translate3d(-10px, -12px, 0); }
}

@keyframes pulseDot {
  0% { box-shadow: 0 0 0 0 rgba(37, 214, 154, 0.55); }
  70% { box-shadow: 0 0 0 12px rgba(37, 214, 154, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 214, 154, 0); }
}

@keyframes heartPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.18); }
  100% { transform: scale(1); }
}

@media (max-width: 980px) {
  .hero-stats { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
}

@media (max-width: 1120px) {
  .hero-stats {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }
}

@media (max-width: 768px) {
  :root { --text-3xl: 2rem; --text-2xl: 1.44rem; }
  .page-wrapper { padding: 0 1.25rem 4rem; }
  .hero-copy { padding: 1.25rem; }
  .hero-stats { grid-template-columns: 1fr; }
  .section-heading { flex-direction: column; align-items: start; }
  .glossary-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-btn,
  .card-link,
  .card-like {
    width: 100%;
    justify-content: center;
  }

  .card-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .card-media {
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 480px) {
  .filter-bar { gap: 0.4rem; }
  .filter-btn { font-size: 0.6rem; padding: 0.35rem 0.75rem; }
  .card-body, .card-footer { padding-left: 1rem; padding-right: 1rem; }
}