:root {
  --sport-bg: #f4f7f6;
  --sport-surface: #ffffff;
  --sport-surface-soft: #edf4f1;

  --sport-text: #17211d;
  --sport-muted: #596861;
  --sport-line: #d8e2dd;

  --sport-accent: #126a50;
  --sport-accent-dark: #0c503c;
  --sport-accent-soft: #dcece5;

  --sport-header: #0b241a;
  --sport-header-2: #173e2d;

  --sport-shadow:
    0 18px 50px rgba(20, 45, 34, 0.10);

  --sport-shadow-small:
    0 10px 30px rgba(20, 45, 34, 0.07);

  --sport-radius: 22px;
  --sport-radius-small: 15px;

  --sport-container: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

body.sport-hub-page {
  margin: 0;
  background: var(--sport-bg);
  color: var(--sport-text);

  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;

  font-size: 17px;
  line-height: 1.7;
}

.sport-hub-page img {
  display: block;
  max-width: 100%;
}

.sport-hub-page a {
  color: var(--sport-accent-dark);
}

.sport-hub-page a:focus-visible,
.sport-hub-page button:focus-visible {
  outline: 3px solid #72b79c;
  outline-offset: 3px;
}

.sport-container {
  width: min(
    calc(100% - 36px),
    var(--sport-container)
  );

  margin-inline: auto;
}

.sport-skip-link {
  position: absolute;
  left: -9999px;
  top: 10px;

  z-index: 9999;

  padding: 10px 14px;

  border-radius: 9px;

  background: #ffffff;
  color: #000000;

  font-weight: 700;
}

.sport-skip-link:focus {
  left: 10px;
}

/* =========================================================
   NAVIGATION
   ========================================================= */

.sport-primary-nav {
  position: relative;
  z-index: 100;

  background: #081b14;
  color: #ffffff;
}

.sport-nav-inner {
  min-height: 70px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.sport-nav-brand {
  color: #ffffff !important;
  text-decoration: none;

  font-weight: 780;
  letter-spacing: 0.01em;
}

.sport-nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;

  margin: 0;
  padding: 0;

  list-style: none;
}

.sport-nav-list a {
  color: #eaf5f0;
  text-decoration: none;

  font-size: 0.95rem;
  font-weight: 620;
}

.sport-nav-list a:hover,
.sport-nav-list a:focus-visible,
.sport-nav-list a[aria-current="page"] {
  color: #ffffff;
  text-decoration: underline;
  text-underline-offset: 5px;
}

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

.sport-site-header {
  position: relative;
  overflow: hidden;

  background:
    radial-gradient(
      circle at 84% 18%,
      rgba(103, 195, 157, 0.20),
      transparent 34rem
    ),
    linear-gradient(
      135deg,
      var(--sport-header) 0%,
      var(--sport-header-2) 64%,
      #0d281e 100%
    );

  color: #ffffff;
}

.sport-site-header::after {
  content: "";

  position: absolute;
  inset: auto -5% -180px 38%;

  width: 680px;
  height: 360px;

  border-radius: 50%;

  background:
    rgba(255, 255, 255, 0.035);

  transform: rotate(-8deg);

  pointer-events: none;
}

.sport-knowledge-hero {
  position: relative;
  z-index: 2;

  padding: 76px 0 64px;
}

.sport-eyebrow,
.sport-card-kicker {
  margin: 0 0 10px;

  color: #8fd0b5;

  font-size: 0.81rem;
  font-weight: 800;

  text-transform: uppercase;
  letter-spacing: 0.09em;
}

main .sport-eyebrow,
main .sport-card-kicker {
  color: var(--sport-accent);
}

.sport-knowledge-hero h1 {
  max-width: 880px;

  margin: 0;

  font-size:
    clamp(
      2.7rem,
      6vw,
      5.5rem
    );

  line-height: 0.96;
  letter-spacing: -0.05em;
}

.sport-lead {
  max-width: 850px;

  margin: 24px 0 0;

  color: #d9e9e2;

  font-size:
    clamp(
      1.15rem,
      2.3vw,
      1.55rem
    );

  line-height: 1.48;
}

.sport-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;

  margin-top: 26px;
}

.sport-hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;

  padding: 7px 11px;

  border:
    1px solid
    rgba(255, 255, 255, 0.16);

  border-radius: 999px;

  background:
    rgba(255, 255, 255, 0.07);

  color: #eaf5f0;

  font-size: 0.88rem;
}

.sport-hero-actions,
.sport-feature-actions,
.sport-book-actions,
.sport-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;

  margin-top: 28px;
}

/* =========================================================
   BUTTONS
   ========================================================= */

.sport-button {
  display: inline-flex;

  min-height: 48px;

  align-items: center;
  justify-content: center;
  gap: 8px;

  padding: 12px 18px;

  border-radius: 12px;

  text-decoration: none;

  font-weight: 760;

  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    background 0.18s ease,
    border-color 0.18s ease;
}

.sport-button:hover {
  transform: translateY(-2px);
}

.sport-site-header .sport-button-primary {
  background: #ffffff;
  color: #12382a;

  box-shadow:
    0 10px 28px
    rgba(0, 0, 0, 0.18);
}

.sport-site-header .sport-button-secondary {
  border:
    1px solid
    rgba(255, 255, 255, 0.25);

  background:
    rgba(255, 255, 255, 0.08);

  color: #ffffff;
}

main .sport-button-primary {
  background: var(--sport-accent);
  color: #ffffff;

  box-shadow:
    0 9px 24px
    rgba(18, 106, 80, 0.18);
}

main .sport-button-primary:hover {
  background: var(--sport-accent-dark);
}

main .sport-button-secondary {
  border:
    1px solid
    var(--sport-line);

  background: #ffffff;
  color: var(--sport-accent-dark);
}

main .sport-button-secondary:hover {
  border-color: #96c7b2;
  background: #f4faf7;
}

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

.sport-hero-hub {
  display: grid;

  grid-template-columns:
    repeat(
      5,
      minmax(0, 1fr)
    );

  gap: 12px;

  margin-top: 42px;
}

.sport-hub-link {
  display: block;

  min-height: 116px;

  padding: 17px;

  border:
    1px solid
    rgba(255, 255, 255, 0.14);

  border-radius: 16px;

  background:
    rgba(255, 255, 255, 0.07);

  color: #ffffff !important;

  text-decoration: none;

  transition:
    transform 0.18s ease,
    background 0.18s ease,
    border-color 0.18s ease;
}

.sport-hub-link:hover,
.sport-hub-link:focus-visible {
  transform: translateY(-2px);

  border-color:
    rgba(255, 255, 255, 0.30);

  background:
    rgba(255, 255, 255, 0.12);
}

.sport-hub-icon {
  display: block;

  margin-bottom: 12px;

  color: #9ed8bf;

  font-size: 1.15rem;
}

.sport-hub-link strong {
  display: block;

  margin-bottom: 4px;

  font-size: 0.98rem;
}

.sport-hub-link span:last-child {
  display: block;

  color: #cfe1d9;

  font-size: 0.85rem;
  line-height: 1.4;
}

/* =========================================================
   SECTIONS
   ========================================================= */

.sport-hub-page main > section {
  padding: 74px 0;
}

.sport-hub-page main > section:nth-child(even) {
  background: #ffffff;
}

.sport-hub-page main h2 {
  margin: 0 0 18px;

  font-size:
    clamp(
      1.9rem,
      3.5vw,
      2.85rem
    );

  line-height: 1.13;
  letter-spacing: -0.028em;
}

.sport-hub-page main h3 {
  margin: 0 0 10px;

  font-size: 1.21rem;
  line-height: 1.3;
}

.sport-section-intro {
  max-width: 880px;

  margin: 0;

  color: var(--sport-muted);

  font-size: 1.06rem;
}

.sport-section-context,
.sport-info-box {
  margin-top: 28px;

  padding: 22px 24px;

  border:
    1px solid
    #cddbd4;

  border-radius:
    var(--sport-radius-small);

  background:
    var(--sport-surface-soft);
}

.sport-section-context p,
.sport-info-box p {
  margin-top: 0;
}

.sport-section-context p:last-child,
.sport-info-box p:last-child {
  margin-bottom: 0;
}

/* =========================================================
   PRINCIPLES
   ========================================================= */

.sport-principle-grid {
  display: grid;

  grid-template-columns:
    repeat(
      4,
      minmax(0, 1fr)
    );

  gap: 16px;

  margin-top: 32px;
}

.sport-principle-item {
  padding: 22px;

  border:
    1px solid
    var(--sport-line);

  border-radius:
    18px;

  background:
    var(--sport-surface);

  box-shadow:
    var(--sport-shadow-small);
}

.sport-principle-item strong {
  display: block;

  margin-bottom: 8px;

  color: var(--sport-accent-dark);

  font-size: 1.04rem;
}

.sport-principle-item p {
  margin: 0;

  color: var(--sport-muted);

  font-size: 0.95rem;
}

/* =========================================================
   CONTENT CARDS
   ========================================================= */

.sport-content-grid {
  display: grid;

  grid-template-columns:
    repeat(
      2,
      minmax(0, 1fr)
    );

  gap: 20px;

  margin-top: 34px;
}

.sport-content-card {
  display: block;

  padding: 26px;

  border:
    1px solid
    var(--sport-line);

  border-radius:
    var(--sport-radius);

  background:
    var(--sport-surface);

  color: var(--sport-text) !important;

  text-decoration: none;

  box-shadow:
    var(--sport-shadow-small);

  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    border-color 0.18s ease;
}

a.sport-content-card:hover,
a.sport-content-card:focus-visible {
  transform: translateY(-3px);

  border-color: #92c3ae;

  box-shadow:
    0 18px 38px
    rgba(20, 45, 34, 0.11);
}

.sport-card-icon {
  display: inline-flex;

  width: 46px;
  height: 46px;

  align-items: center;
  justify-content: center;

  margin-bottom: 18px;

  border-radius: 13px;

  background:
    var(--sport-accent-soft);

  color:
    var(--sport-accent-dark);

  font-size: 1.2rem;
}

.sport-content-card p {
  margin: 0;

  color: var(--sport-muted);
}

.sport-card-link {
  display: inline-block;

  margin-top: 18px;

  color: var(--sport-accent-dark);

  font-weight: 760;
}

/* =========================================================
   SPLIT / FORMAT
   ========================================================= */

.sport-split-grid {
  display: grid;

  grid-template-columns:
    minmax(0, 1.1fr)
    minmax(300px, 0.9fr);

  gap: 34px;

  align-items: start;

  margin-top: 34px;
}

.sport-feature {
  padding: 28px;

  border:
    1px solid
    var(--sport-line);

  border-radius:
    var(--sport-radius);

  background:
    #ffffff;

  box-shadow:
    var(--sport-shadow-small);
}

.sport-feature h3 {
  font-size: 1.45rem !important;
}

.sport-feature p {
  color: var(--sport-muted);
}

.sport-knowledge-list {
  margin: 22px 0 0;
  padding: 0;

  list-style: none;
}

.sport-knowledge-list li {
  position: relative;

  margin: 0;
  padding: 10px 0 10px 26px;

  border-bottom:
    1px solid
    #e4ebe7;
}

.sport-knowledge-list li:last-child {
  border-bottom: 0;
}

.sport-knowledge-list li::before {
  content: "•";

  position: absolute;
  left: 5px;
  top: 8px;

  color: var(--sport-accent);

  font-size: 1.2rem;
  font-weight: 900;
}

/* =========================================================
   BOOK FEATURE
   ========================================================= */

.sport-book-background {
  padding: 34px;

  border-radius: 28px;

  background:
    linear-gradient(
      135deg,
      #10291f 0%,
      #173d2e 100%
    );

  color: #ffffff;

  box-shadow:
    var(--sport-shadow);
}

.sport-book-feature {
  display: grid;

  grid-template-columns:
    minmax(190px, 280px)
    minmax(0, 1fr);

  gap: 42px;

  align-items: center;
}

.sport-book-cover-link {
  display: block;

  max-width: 270px;

  margin-inline: auto;

  text-decoration: none;
}

.sport-book-cover-link img {
  width: 100%;

  border-radius: 13px;

  box-shadow:
    0 24px 55px
    rgba(0, 0, 0, 0.33);

  transition:
    transform 0.18s ease;
}

.sport-book-cover-link:hover img {
  transform:
    translateY(-3px)
    rotate(-0.4deg);
}

.sport-book-content .sport-card-kicker {
  color: #9bd5bd;
}

.sport-book-content h2 {
  color: #ffffff;
}

.sport-book-content p {
  color: #d8e8e1;
}

.sport-book-content .sport-knowledge-list li {
  border-color:
    rgba(255, 255, 255, 0.12);

  color: #e1eee8;
}

.sport-book-content .sport-knowledge-list li::before {
  color: #9bd5bd;
}

.sport-book-background .sport-button-primary {
  background: #ffffff;
  color: #12382a;
}

.sport-book-background .sport-button-secondary {
  border-color:
    rgba(255, 255, 255, 0.22);

  background:
    rgba(255, 255, 255, 0.07);

  color: #ffffff;
}

/* =========================================================
   AUTHOR
   ========================================================= */

.sport-author-profile {
  display: grid;

  grid-template-columns:
    160px
    minmax(0, 1fr);

  gap: 30px;

  align-items: center;

  margin-top: 28px;
}

.sport-author-portrait img {
  width: 160px;
  height: 160px;

  object-fit: cover;

  border-radius: 50%;

  box-shadow:
    var(--sport-shadow-small);
}

.sport-author-profile-text p {
  color: var(--sport-muted);
}

/* =========================================================
   CONTACT
   ========================================================= */

.sport-contact-grid {
  display: grid;

  grid-template-columns:
    repeat(
      2,
      minmax(0, 1fr)
    );

  gap: 18px;

  margin-top: 30px;
}

.sport-contact-card {
  padding: 24px;

  border:
    1px solid
    var(--sport-line);

  border-radius:
    18px;

  background:
    #ffffff;
}

.sport-contact-card strong {
  display: block;

  margin-bottom: 6px;

  color:
    var(--sport-accent-dark);
}

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

.sport-site-footer {
  padding: 36px 0;

  background: #081b14;
  color: #d8e7e0;
}

.sport-footer-inner {
  display: flex;
  flex-wrap: wrap;

  justify-content: space-between;
  gap: 20px;
}

.sport-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.sport-site-footer a {
  color: #ffffff;
}

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

@media (max-width: 980px) {

  .sport-hero-hub {
    grid-template-columns:
      repeat(
        3,
        minmax(0, 1fr)
      );
  }

  .sport-principle-grid {
    grid-template-columns:
      repeat(
        2,
        minmax(0, 1fr)
      );
  }

  .sport-split-grid {
    grid-template-columns: 1fr;
  }

}

@media (max-width: 760px) {

  body.sport-hub-page {
    font-size: 16px;
  }

  .sport-nav-inner {
    align-items: flex-start;
    flex-direction: column;

    padding: 16px 0;
  }

  .sport-nav-list {
    gap: 12px 16px;
  }

  .sport-knowledge-hero {
    padding: 52px 0 46px;
  }

  .sport-hub-page main > section {
    padding: 54px 0;
  }

  .sport-content-grid,
  .sport-principle-grid,
  .sport-contact-grid {
    grid-template-columns: 1fr;
  }

  .sport-hero-hub {
    grid-template-columns:
      repeat(
        2,
        minmax(0, 1fr)
      );
  }

  .sport-book-feature {
    grid-template-columns: 1fr;
  }

  .sport-book-background {
    padding: 24px;
  }

  .sport-author-profile {
    grid-template-columns: 1fr;
  }

  .sport-author-portrait img {
    width: 132px;
    height: 132px;
  }

}

@media (max-width: 470px) {

  .sport-container {
    width: min(
      calc(100% - 24px),
      var(--sport-container)
    );
  }

  .sport-hero-hub {
    grid-template-columns: 1fr;
  }

  .sport-hero-actions,
  .sport-feature-actions,
  .sport-book-actions,
  .sport-contact-actions {
    flex-direction: column;
  }

  .sport-button {
    width: 100%;
  }

}