/* ===================================================
   Intrepid Sport Science — Main Stylesheet
   Brand: Signal palette
   =================================================== */

/* --- Brand tokens --- */
:root {
  --ink: #111518;
  --slate: #1E293B;
  --signal: #34D399;
  --mint: #6EE7B7;
  --gold: #D4A84B;
  --cloud: #E2E8F0;
  --white: #FFFFFF;
  --light-text: #94A3B8;

  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --max-width: 1080px;
  --gutter: 24px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--white);
}

img, svg {
  display: block;
  max-width: 100%;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}


/* ===================================================
   NAVIGATION — hero (transparent over dark)
   =================================================== */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 40px;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
}

.nav__links {
  display: flex;
  gap: 32px;
}

.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--light-text);
  letter-spacing: 0.5px;
  transition: color 0.2s;
}

.nav__link:hover {
  color: var(--signal);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--light-text);
  border-radius: 1px;
  transition: background 0.2s;
}


/* ===================================================
   HERO — full dark
   =================================================== */
.hero {
  background: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Subtle grid overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(52, 211, 153, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(52, 211, 153, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  padding: 0 var(--gutter);
}

.hero__icon {
  margin: 0 auto 32px;
  opacity: 0.9;
}

.hero__title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 600;
  color: var(--signal);
  letter-spacing: -0.5px;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero__subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--light-text);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.5;
}

.hero__cta {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--gold);
  letter-spacing: 1px;
  padding: 12px 28px;
  border: 1px solid rgba(212, 168, 75, 0.3);
  border-radius: 4px;
  transition: all 0.2s;
}

.hero__cta:hover {
  border-color: var(--gold);
  background: rgba(212, 168, 75, 0.08);
}


/* ===================================================
   BANNER — dark strip on light pages
   =================================================== */
.banner {
  background: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.banner__links {
  display: flex;
  gap: 28px;
}

.banner__links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--light-text);
  letter-spacing: 0.5px;
  transition: color 0.2s;
}

.banner__links a:hover {
  color: var(--signal);
}


/* ===================================================
   SECTIONS — light background
   =================================================== */
.section-heading {
  font-size: 28px;
  font-weight: 600;
  color: var(--signal);
  margin-bottom: 40px;
  letter-spacing: -0.3px;
}

.section-heading--light {
  color: var(--signal);
}


/* --- About --- */
.about {
  background: var(--cloud);
}

.about .container {
  padding-top: 80px;
  padding-bottom: 80px;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

.about__text p {
  margin-bottom: 16px;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
}

.about__text strong {
  font-weight: 600;
}

.stat-card {
  background: var(--white);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 12px;
  border-left: 3px solid var(--signal);
}

.stat-card__number {
  display: block;
  font-size: 28px;
  font-weight: 600;
  color: var(--signal);
  font-family: var(--font-mono);
  line-height: 1.2;
}

.stat-card__label {
  display: block;
  font-size: 13px;
  color: var(--light-text);
  margin-top: 4px;
  line-height: 1.4;
}


/* --- Capabilities --- */
.capabilities {
  background: var(--white);
}

.capabilities .container {
  padding-top: 80px;
  padding-bottom: 80px;
}

.capabilities__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.cap-card {
  background: var(--cloud);
  border-radius: 8px;
  padding: 32px;
  transition: transform 0.15s, box-shadow 0.15s;
}

.cap-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.cap-card__icon {
  margin-bottom: 16px;
}

.cap-card__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.cap-card__text {
  font-size: 14px;
  color: var(--light-text);
  line-height: 1.6;
}


/* --- Credentials --- */
.credentials {
  background: var(--cloud);
}

.credentials .container {
  padding-top: 80px;
  padding-bottom: 80px;
}

.credentials__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.cred-item {
  display: flex;
  gap: 16px;
  align-items: start;
  background: var(--white);
  border-radius: 8px;
  padding: 24px;
}

.cred-item__badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--gold);
  font-size: 18px;
  flex-shrink: 0;
}

.cred-item__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.cred-item__text {
  font-size: 14px;
  color: var(--light-text);
  line-height: 1.5;
}


/* --- Contact --- */
.contact {
  background: var(--ink);
  text-align: center;
}

.contact .container {
  padding-top: 80px;
  padding-bottom: 80px;
}

.contact__text {
  font-size: 18px;
  color: var(--light-text);
  margin-bottom: 24px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.contact__email {
  display: inline-block;
  font-size: 20px;
  font-weight: 500;
  color: var(--signal);
  font-family: var(--font-mono);
  padding: 16px 36px;
  border: 1px solid rgba(52, 211, 153, 0.3);
  border-radius: 4px;
  transition: all 0.2s;
  letter-spacing: 0.5px;
}

.contact__email:hover {
  border-color: var(--signal);
  background: rgba(52, 211, 153, 0.08);
}


/* --- Footer --- */
.footer {
  background: var(--ink);
  border-top: 1px solid var(--slate);
  padding: 32px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__text {
  text-align: right;
}

.footer__text p {
  font-size: 12px;
  color: var(--light-text);
  line-height: 1.6;
}


/* ===================================================
   RESPONSIVE
   =================================================== */
@media (max-width: 768px) {
  .nav {
    padding: 16px 20px;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--ink);
    flex-direction: column;
    padding: 16px 20px;
    gap: 16px;
    border-top: 1px solid var(--slate);
  }

  .nav__links--open {
    display: flex;
  }

  .banner {
    padding: 12px 20px;
  }

  .banner__links {
    display: none;
  }

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

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

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

  .footer__inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .footer__text {
    text-align: center;
  }

  .hero__icon svg {
    width: 120px;
    height: auto;
  }
}

@media (max-width: 480px) {
  .hero__title {
    font-size: 28px;
  }

  .hero__subtitle {
    font-size: 15px;
  }

  .section-heading {
    font-size: 24px;
  }

  .contact__email {
    font-size: 16px;
    padding: 12px 24px;
  }
}