:root {
  --dark: #060e10;
  --dark2: #0a1a1c;
  --dark3: #0f2528;
  --dark4: #152e32;
  --teal: #00c9c0;
  --teal-dark: #009e96;
  --teal-glow: rgba(0, 201, 192, 0.35);
  --text: #d4eaeb;
  --text-muted: #7fa8ac;
  --silver: #c0c0c0;
  --radius: 14px;
  --radius-lg: 22px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --display: Georgia, "Times New Roman", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--dark);
  line-height: 1.65;
}

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

a {
  color: var(--teal);
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--teal);
  color: #041012;
  padding: 0.6rem 1rem;
  z-index: 100;
}

.skip:focus {
  left: 0.75rem;
  top: 0.75rem;
}

.wrap {
  width: min(1120px, calc(100% - 2.2rem));
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(6, 14, 16, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 201, 192, 0.12);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.08em;
  font-size: 0.92rem;
  text-transform: uppercase;
}

.brand .num {
  color: var(--teal);
}

.mark {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  border: 1.5px solid var(--teal);
  display: grid;
  place-items: center;
  background: #071618;
  box-shadow: 0 0 16px var(--teal-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
}

.nav-links a:hover {
  color: var(--teal);
}

.nav-links a.btn {
  letter-spacing: 0.06em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  font-weight: 800;
  border-radius: 999px;
  padding: 0.85rem 1.35rem;
  font-family: var(--font);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-teal {
  background: var(--teal);
  color: #041012;
  box-shadow: 0 0 28px var(--teal-glow);
}

.btn-teal:hover {
  background: #12ddd4;
}

.btn-ghost {
  background: transparent;
  color: var(--teal);
  border: 1.5px solid var(--teal);
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--teal);
  color: var(--teal);
  border-radius: 10px;
  padding: 0.4rem 0.7rem;
}

/* Hero */
.hero-band {
  position: relative;
  overflow: hidden;
  padding: 4.6rem 0 3.2rem;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 55% at 50% 40%, rgba(0, 201, 192, 0.1), transparent 62%),
    radial-gradient(circle at 50% 40%, transparent 0 18%, rgba(0, 201, 192, 0.06) 18.5% 19%, transparent 20%),
    var(--dark);
}

.hero-band::before,
.hero-band::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 42%;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(0, 201, 192, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.hero-band::before {
  width: min(92vw, 920px);
  height: min(92vw, 920px);
}

.hero-band::after {
  width: min(60vw, 560px);
  height: min(60vw, 560px);
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(0, 201, 192, 0.35);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  font-weight: 700;
}

.kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 8px var(--teal);
}

h1,
h2,
h3 {
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h1 {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(2.15rem, 5.2vw, 3.6rem);
  margin: 1.1rem auto 0.9rem;
  max-width: 16ch;
  color: var(--text);
}

.lede {
  max-width: 58ch;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.lede strong,
.hi {
  color: var(--teal);
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
  margin: 1.7rem 0 0;
}

.meta-row {
  margin-top: 1.2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  margin-top: 2.6rem;
}

.stat {
  background: var(--dark3);
  border: 1px solid rgba(0, 201, 192, 0.14);
  border-radius: var(--radius);
  padding: 1rem 0.7rem;
}

.stat b {
  display: block;
  font-size: 1.35rem;
  color: var(--teal);
  font-weight: 800;
}

.stat span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-head {
  text-align: center;
  margin-bottom: 1.8rem;
}

.eyebrow {
  color: var(--teal);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
}

h2 {
  font-family: var(--display);
  font-size: clamp(1.7rem, 3.2vw, 2.35rem);
  font-weight: 900;
  margin: 0.4rem 0 0.55rem;
}

.section-head p {
  color: var(--text-muted);
  max-width: 62ch;
  margin: 0 auto;
}

.panel,
.card {
  background: var(--dark3);
  border: 1px solid rgba(0, 201, 192, 0.14);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.grid-3,
.grid-2,
.grid-4 {
  display: grid;
  gap: 1rem;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
  grid-template-columns: 1fr 1fr;
}

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

.card h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0, 201, 192, 0.12);
  border: 1px solid rgba(0, 201, 192, 0.28);
  display: grid;
  place-items: center;
  margin-bottom: 0.75rem;
  color: var(--teal);
}

/* Steps */
.steps-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.step {
  text-align: center;
  background: var(--dark2);
  border: 1px solid rgba(0, 201, 192, 0.12);
  border-radius: var(--radius);
  padding: 1rem 0.6rem;
}

.step h4 {
  margin: 0 0 0.25rem;
  font-size: 0.92rem;
}
.step p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.step i {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin: 0 auto 0.55rem;
  border-radius: 50%;
  background: var(--teal);
  color: #041012;
  font-style: normal;
  font-weight: 800;
}

ol.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

ol.steps li {
  counter-increment: step;
  position: relative;
  padding: 0.9rem 0 0.9rem 3.2rem;
  border-bottom: 1px solid rgba(0, 201, 192, 0.12);
}

ol.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: var(--teal);
  color: #041012;
  display: grid;
  place-items: center;
  font-weight: 800;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  text-align: left;
  padding: 0.75rem 0.7rem;
  border-bottom: 1px solid rgba(0, 201, 192, 0.12);
}

th {
  color: var(--teal);
}

/* Games */
.filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.2rem;
}

.filters button {
  background: var(--dark3);
  border: 1px solid rgba(0, 201, 192, 0.2);
  color: var(--text);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  font-weight: 650;
}

.filters button.active,
.filters button:hover {
  background: var(--teal);
  color: #041012;
  border-color: var(--teal);
}

.game {
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background:
    linear-gradient(180deg, transparent 20%, rgba(6, 14, 16, 0.92)),
    var(--dark4);
  border: 1px solid rgba(0, 201, 192, 0.16);
  border-radius: 16px;
  padding: 0.9rem;
}

.game small {
  color: var(--teal);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.game strong {
  display: block;
}

/* Schema */
.schema-stage {
  overflow-x: auto;
}

.schema-svg {
  width: 100%;
  min-width: 720px;
}

.node {
  cursor: pointer;
}

.node:hover rect {
  stroke: var(--teal);
}

[data-schema-readout] {
  color: var(--text-muted);
}

/* FAQ */
.faq details {
  border: 1px solid rgba(0, 201, 192, 0.14);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  margin-bottom: 0.65rem;
  background: var(--dark3);
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

.author {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1rem;
  align-items: center;
}

.avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(0, 201, 192, 0.15);
  border: 1px solid var(--teal);
  color: var(--teal);
  display: grid;
  place-items: center;
  font-weight: 800;
}

.cta-band {
  background: linear-gradient(135deg, #0f2528, #0a1a1c);
  border: 1px solid rgba(0, 201, 192, 0.28);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

form {
  display: grid;
  gap: 0.75rem;
}

label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

input,
select,
textarea {
  width: 100%;
  background: #071416;
  border: 1px solid rgba(0, 201, 192, 0.22);
  color: var(--text);
  border-radius: 12px;
  padding: 0.8rem 0.9rem;
  font: inherit;
}

.form-note {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.page {
  padding: 2.6rem 0 3.6rem;
}

.page h1 {
  max-width: none;
  text-align: left;
  margin-left: 0;
}

.page .lede {
  margin-left: 0;
  text-align: left;
}

.site-footer {
  border-top: 1px solid rgba(0, 201, 192, 0.14);
  padding: 2.4rem 0 1.6rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  background: #050c0e;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 1.4rem;
}

.foot-grid h5 {
  margin: 0 0 0.6rem;
  color: var(--text);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.toc a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.22rem 0;
}

.toc a:hover {
  color: var(--teal);
}

.legal {
  margin-top: 1.6rem;
  font-size: 0.8rem;
  border-top: 1px solid rgba(0, 201, 192, 0.1);
  padding-top: 1rem;
}

.warn {
  color: #c9b56a;
  font-size: 0.82rem;
}

@media (max-width: 960px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .steps-row,
  .grid-3,
  .grid-2,
  .cta-band,
  .foot-grid,
  .author {
    grid-template-columns: 1fr;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    inset: 76px 0 auto;
    background: #060e10;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.2rem 1.3rem;
    border-bottom: 1px solid rgba(0, 201, 192, 0.16);
  }

  .nav-links.open {
    display: flex;
  }

  h1 {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn {
    transition: none;
  }
}