@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@400;500;600;700&family=Syne:wght@500;600;700;800&display=swap");

:root {
  --page-bg: #131111;
  --panel: rgba(255, 245, 232, 0.06);
  --border: rgba(255, 239, 219, 0.14);
  --text: #f7f1e8;
  --muted: #c3b8aa;
  --accent: #ff6b3d;
  --signal: #f6b93d;
  --zone-two: #65c9b9;
  --zone-three: #f6b93d;
  --zone-four: #ff8a63;
  --zone-five: #ff4f4f;
  --shadow-strong: 0 28px 80px rgba(0, 0, 0, 0.35);
  --shadow-soft: 0 18px 48px rgba(0, 0, 0, 0.24);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --content-width: min(1180px, calc(100vw - 32px));
  --header-offset: 104px;
  --section-space: clamp(36px, 6vw, 72px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  scroll-padding-top: var(--header-offset);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 107, 61, 0.12), transparent 30%),
    radial-gradient(circle at 88% 12%, rgba(246, 185, 61, 0.09), transparent 24%),
    linear-gradient(180deg, #181311 0%, #131111 46%, #0e0c0c 100%);
  font-family: "IBM Plex Sans", sans-serif;
}

body.has-open-menu {
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.2;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, transparent, black 14%, black 88%, transparent);
}

a {
  color: inherit;
  text-decoration: none;
}

.page-shell {
  position: relative;
  width: var(--content-width);
  margin: 0 auto;
  padding: 18px 0 44px;
}

.page-shell main {
  display: grid;
  gap: clamp(10px, 2vw, 20px);
}

.page-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.08;
  mix-blend-mode: soft-light;
  background-image:
    radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.55) 0 1px, transparent 1px),
    radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.35) 0 1px, transparent 1px);
  background-size: 11px 11px, 13px 13px;
}

.site-header,
.site-footer,
.hero,
.proof-strip,
.story-card,
.sport-card,
.feature-panel,
.outcome-card,
.faq-list details,
.closing-cta {
  backdrop-filter: blur(18px);
}

.site-header {
  position: sticky;
  top: 10px;
  z-index: 20;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 18px;
  margin-bottom: 16px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 239, 219, 0.08);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(19, 17, 17, 0.86), rgba(19, 17, 17, 0.72));
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.14);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  overflow: hidden;
  background-image: url("./assets/heart-stream.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}

.brand__wordmark {
  font-family: "Syne", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-left: auto;
  padding: 0;
  border: 1px solid rgba(255, 239, 219, 0.14);
  border-radius: 14px;
  background: rgba(255, 245, 232, 0.05);
  color: var(--text);
  cursor: pointer;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease;
}

.site-menu-toggle:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 239, 219, 0.24);
}

.site-menu-toggle span {
  position: absolute;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition:
    transform 180ms ease,
    opacity 180ms ease;
}

.site-menu-toggle span:nth-child(1) {
  transform: translateY(-6px);
}

.site-menu-toggle span:nth-child(3) {
  transform: translateY(6px);
}

.site-menu-toggle.is-open span:nth-child(1) {
  transform: rotate(45deg);
}

.site-menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.site-menu-toggle.is-open span:nth-child(3) {
  transform: rotate(-45deg);
}

.site-header__drawer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-width: 0;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 22px;
  color: rgba(195, 184, 170, 0.88);
  font-size: 0.88rem;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
}

.site-header__actions {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(255, 239, 219, 0.08);
  border-radius: 999px;
  background: rgba(255, 245, 232, 0.03);
}

.lang-switch__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  color: rgba(195, 184, 170, 0.86);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lang-switch__link:hover {
  color: var(--text);
}

.lang-switch__link.is-active {
  background: rgba(255, 245, 232, 0.12);
  color: var(--text);
}

.site-header .button--ghost {
  background: rgba(255, 245, 232, 0.03);
  border-color: rgba(255, 239, 219, 0.12);
  color: rgba(247, 241, 232, 0.92);
}

.site-nav a:hover,
.site-footer__link:hover {
  color: var(--text);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease;
}

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

.button--primary {
  background: linear-gradient(135deg, var(--accent), var(--signal));
  color: #1c100c;
  box-shadow: 0 18px 36px rgba(255, 107, 61, 0.24);
}

.button--secondary,
.button--ghost {
  border-color: var(--border);
  background: rgba(255, 245, 232, 0.04);
  color: var(--text);
}

.button--compact {
  min-height: 40px;
  padding: 0 16px;
}

.button--large {
  min-height: 58px;
  padding: 0 26px;
}

.section[id],
.faq-cta[id],
main[id] {
  scroll-margin-top: calc(var(--header-offset) + 14px);
}

.section {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 0;
  padding: var(--section-space) 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.98fr);
  gap: 26px;
  align-items: center;
  min-height: min(740px, calc(100svh - var(--header-offset) - 36px));
  padding: clamp(20px, 4vw, 44px) 0 12px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--signal);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.closing-cta h2 {
  margin: 0;
  font-family: "Syne", sans-serif;
  font-weight: 700;
  line-height: 0.94;
  letter-spacing: -0.04em;
}

.hero h1 {
  max-width: 12ch;
  font-size: clamp(3.4rem, 8vw, 6.2rem);
}

.hero h1 span {
  color: var(--muted);
}

.hero__lede,
.feature-panel p,
.outcome-card p,
.story-card li,
.sport-card p,
.closing-cta p,
.faq-list p,
.site-footer p {
  color: var(--muted);
  line-height: 1.65;
}

.hero__lede {
  max-width: 62ch;
  margin: 18px 0 0;
  font-size: 1.05rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 28px 0 0;
}

.hero-metrics div {
  padding-top: 16px;
  border-top: 1px solid rgba(255, 245, 232, 0.12);
}

.hero-metrics dt {
  color: var(--signal);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-metrics dd {
  margin: 8px 0 0;
  font-size: 1rem;
  line-height: 1.4;
}

.hero__visual {
  position: relative;
  min-height: 540px;
  display: grid;
  place-items: center;
}

.command-card {
  position: relative;
  width: min(100%, 540px);
  padding: 20px;
  border: 1px solid rgba(255, 245, 232, 0.14);
  border-radius: 32px;
  background:
    radial-gradient(circle at top right, rgba(255, 107, 61, 0.08), transparent 30%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    rgba(9, 10, 11, 0.9);
  box-shadow: var(--shadow-strong);
  transform: rotate(-4deg);
}

.command-card__topline,
.interval-strip__label,
.floating-note__label,
.sport-card__tag,
.feature-panel__index,
.proof-strip__index {
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.command-card__topline {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.75rem;
}

.command-card__headline {
  margin-top: 12px;
  max-width: 12ch;
  font-family: "Syne", sans-serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.command-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.athlete-card {
  padding: 14px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.04);
}

.athlete-card__name {
  color: var(--muted);
  font-size: 0.92rem;
}

.athlete-card__pulse {
  margin-top: 8px;
  font-family: "Syne", sans-serif;
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.athlete-card__zone {
  margin-top: 8px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.athlete-card--z2 {
  box-shadow: inset 0 0 0 1px rgba(101, 201, 185, 0.2);
}

.athlete-card--z3 {
  box-shadow: inset 0 0 0 1px rgba(246, 185, 61, 0.2);
}

.athlete-card--z4 {
  box-shadow: inset 0 0 0 1px rgba(255, 138, 99, 0.2);
}

.athlete-card--z5 {
  box-shadow: inset 0 0 0 1px rgba(255, 79, 79, 0.2);
}

.athlete-card--z2 .athlete-card__pulse,
.athlete-card--z2 .athlete-card__zone {
  color: var(--zone-two);
}

.athlete-card--z3 .athlete-card__pulse,
.athlete-card--z3 .athlete-card__zone {
  color: var(--zone-three);
}

.athlete-card--z4 .athlete-card__pulse,
.athlete-card--z4 .athlete-card__zone {
  color: var(--zone-four);
}

.athlete-card--z5 .athlete-card__pulse,
.athlete-card--z5 .athlete-card__zone {
  color: var(--zone-five);
}

.interval-strip {
  margin-top: 18px;
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
}

.interval-strip__label {
  color: var(--muted);
  font-size: 0.72rem;
}

.interval-strip__bar {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(255, 107, 61, 0.24), rgba(246, 185, 61, 0.24));
}

.interval-strip__work,
.interval-strip__recover {
  font-weight: 700;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.proof-strip__item,
.story-card,
.sport-card,
.feature-panel,
.outcome-card,
.faq-list details,
.closing-cta {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.proof-strip__item {
  padding: 20px;
}

.proof-strip__index {
  display: inline-block;
  color: var(--signal);
  font-size: 0.78rem;
}

.proof-strip__item p {
  margin: 16px 0 0;
  font-family: "Syne", sans-serif;
  font-size: 1.2rem;
  line-height: 1.1;
}

.section-heading {
  display: grid;
  gap: 10px;
  margin-bottom: 24px;
}

.section-heading h2 {
  max-width: 12ch;
  font-size: clamp(2rem, 4.5vw, 4rem);
}

.problem-value__grid,
.sports-grid,
.product-layout,
.outcome-grid {
  display: grid;
  gap: 16px;
}

.problem-value__grid,
.sports-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.story-card,
.sport-card,
.feature-panel,
.outcome-card,
.closing-cta {
  padding: 24px;
}

.story-card h3,
.sport-card h3,
.feature-panel h3,
.outcome-card h3 {
  margin: 0;
  font-family: "Syne", sans-serif;
  font-size: 1.45rem;
  line-height: 1.05;
}

.story-card ul {
  margin: 18px 0 0;
  padding-left: 18px;
}

.story-card li + li {
  margin-top: 10px;
}

.story-card--problem {
  background: linear-gradient(180deg, rgba(255, 79, 79, 0.08), rgba(255, 255, 255, 0.03));
}

.story-card--value {
  background: linear-gradient(180deg, rgba(101, 201, 185, 0.08), rgba(255, 255, 255, 0.03));
}

.sport-card__tag,
.feature-panel__index {
  color: var(--signal);
  font-size: 0.76rem;
}

.sport-card p,
.feature-panel p,
.outcome-card p {
  margin: 14px 0 0;
}

.product-layout {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-panel--wide {
  background:
    radial-gradient(circle at right top, rgba(255, 107, 61, 0.1), transparent 28%),
    var(--panel);
}

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

.faq-list {
  display: grid;
  gap: 14px;
  max-width: 860px;
}

.faq {
  align-items: center;
}

.faq .section-heading,
.faq .faq-cta {
  justify-items: center;
  text-align: center;
}

.faq .faq-list {
  width: min(100%, 860px);
}

.faq .faq-list details {
  text-align: left;
}

.faq-list details {
  padding: 18px 20px;
}

.faq-list summary {
  list-style: none;
  cursor: pointer;
  font-family: "Syne", sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list p {
  margin: 12px 0 0;
  max-width: 72ch;
}

.faq-cta {
  display: grid;
  justify-items: start;
  gap: 14px;
  max-width: 860px;
  margin-top: 24px;
  padding: 24px 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(255, 107, 61, 0.12), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)),
    rgba(255, 245, 232, 0.04);
  box-shadow: var(--shadow-soft);
}

.faq-cta h3 {
  margin: 0;
  max-width: 15ch;
  font-family: "Syne", sans-serif;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 18px;
  margin-top: 22px;
  padding: 24px 10px 4px;
  color: var(--muted);
}

.site-footer p {
  margin: 8px 0 0;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero__visual {
    min-height: 460px;
  }

  .proof-strip,
  .problem-value__grid,
  .sports-grid,
  .product-layout,
  .outcome-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 840px) {
  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    top: 8px;
    padding: 12px 14px;
  }

  .site-menu-toggle {
    position: relative;
    display: inline-flex;
    z-index: 2;
  }

  .site-header__drawer {
    position: fixed;
    inset: 14px 10px auto;
    display: grid;
    gap: 18px;
    padding: 82px 18px 18px;
    border: 1px solid rgba(255, 239, 219, 0.08);
    border-radius: 24px;
    background:
      linear-gradient(180deg, rgba(19, 17, 17, 0.96), rgba(19, 17, 17, 0.92)),
      rgba(19, 17, 17, 0.96);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-12px);
    transition:
      opacity 180ms ease,
      visibility 180ms ease,
      transform 180ms ease;
  }

  .site-header__drawer.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .site-nav a {
    min-height: 44px;
    padding: 0 4px;
    font-size: 1rem;
  }

  .site-header__actions {
    display: grid;
    justify-content: stretch;
    gap: 14px;
  }

  .hero {
    padding: 14px 0 4px;
  }

  .section {
    padding: 34px 0 16px;
  }

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

  .command-card {
    transform: none;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .page-shell {
    width: min(100vw - 18px, 100%);
    padding-top: 10px;
  }

  .site-header {
    top: 6px;
    padding: 10px 12px;
  }

  .site-header__drawer {
    inset: 10px 9px auto;
    padding: 76px 16px 16px;
  }

  .site-header__actions,
  .lang-switch {
    width: 100%;
  }

  .lang-switch {
    justify-content: space-between;
  }

  .lang-switch__link {
    flex: 1 1 0;
  }

  .hero,
  .story-card,
  .sport-card,
  .feature-panel,
  .outcome-card,
  .faq-list details,
  .proof-strip__item,
  .faq-cta {
    border-radius: 22px;
  }

  .hero h1 {
    font-size: clamp(2.8rem, 16vw, 4.2rem);
  }

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

  .button,
  .button--compact,
  .button--large {
    width: 100%;
  }

  .hero__actions {
    flex-direction: column;
  }
}