/* Global Styles — Base, Nav, Footer, Buttons, Utilities */

/* ── Base ──────────────────────────────────────────────────── */

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-regular);
  font-size: var(--text-base);
  color: var(--color-dark);
  background-color: var(--color-white);
  line-height: var(--leading-normal);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-tight);
}

a {
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-green);
}

img {
  height: auto;
}

/* ── Container ─────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* ── Skip Link (a11y) ──────────────────────────────────────── */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: calc(var(--z-nav) + 1);
  padding: var(--space-2) var(--space-4);
  background: var(--color-green);
  color: var(--color-white);
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ── Navigation ────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background-color: var(--color-green);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  height: var(--nav-height);
}

.nav__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.nav__logo img {
  height: 56px;
  width: auto;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: color var(--transition-fast);
  padding-block: var(--space-1);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-white);
  transition: width var(--transition-base);
}

.nav__link:hover {
  color: var(--color-white);
  opacity: 0.8;
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link--sponsor {
  padding: var(--space-2) var(--space-5);
  color: var(--color-green);
  background-color: var(--color-white);
  border: 2px solid var(--color-white);
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast);
}

.nav__link--sponsor::after {
  display: none;
}

.nav__link--sponsor:hover {
  opacity: 0.9;
  color: var(--color-green);
}

.nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-2);
  color: var(--color-white);
  background: none;
  border: none;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.nav__toggle:hover {
  opacity: 0.8;
}

@media (max-width: 900px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--color-green);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6) var(--container-padding);
    gap: var(--space-5);
    box-shadow: var(--shadow-md);
    border-top: 1px solid rgba(0,0,0,0.08);
  }

  .nav__menu.is-open {
    display: flex;
  }

  .nav__link {
    font-size: var(--text-base);
  }

  .nav__link--sponsor {
    align-self: flex-start;
  }
}

/* ── Footer ────────────────────────────────────────────────── */

.site-footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding-block: var(--space-16) var(--space-10);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand-name {
  display: inline-block;
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
  transition: opacity var(--transition-fast);
}

.footer__brand-name:hover {
  opacity: 0.8;
  color: var(--color-white);
}

.footer__tagline {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: rgba(255,255,255,0.65);
  max-width: 28ch;
}

.footer__heading {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.45);
  margin-bottom: var(--space-5);
}

.footer__links ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.75);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-green);
}

.footer__contact address {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__contact p {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.75);
  line-height: var(--leading-normal);
}

.footer__contact a {
  color: rgba(255,255,255,0.75);
  transition: color var(--transition-fast);
}

.footer__contact a:hover {
  color: var(--color-green);
}

.footer__social-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer__social-links a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.75);
  transition: color var(--transition-fast);
}

.footer__social-links a:hover {
  color: var(--color-green);
}

.footer__social-links svg {
  flex-shrink: 0;
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-8);
  text-align: center;
}

.footer__bottom p {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}

@media (max-width: 900px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }
}

/* ── Buttons ───────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-family);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--primary {
  background-color: var(--color-green);
  color: var(--color-white);
  border-color: var(--color-green);
}

.btn--primary:hover {
  background-color: var(--color-green-dark);
  border-color: var(--color-green-dark);
  color: var(--color-white);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-green);
  border-color: var(--color-green);
}

.btn--outline:hover {
  background-color: var(--color-green);
  color: var(--color-white);
}

.btn--blue {
  background-color: var(--color-blue);
  color: var(--color-white);
  border-color: var(--color-blue);
}

.btn--blue:hover {
  background-color: var(--color-blue-dark);
  border-color: var(--color-blue-dark);
  color: var(--color-white);
}

.btn--yellow {
  background-color: var(--color-yellow);
  color: var(--color-dark);
  border-color: var(--color-yellow);
}

.btn--yellow:hover {
  background-color: #e2d168;
  border-color: #e2d168;
  color: var(--color-dark);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn--ghost:hover {
  background-color: var(--color-white);
  color: var(--color-dark);
}

.btn--lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-base);
}

/* ── Scroll Reveal ─────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

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

.reveal[data-delay="100"] { transition-delay: 100ms; }
.reveal[data-delay="200"] { transition-delay: 200ms; }
.reveal[data-delay="300"] { transition-delay: 300ms; }
.reveal[data-delay="400"] { transition-delay: 400ms; }
.reveal[data-delay="500"] { transition-delay: 500ms; }

/* ── Visually Hidden (a11y) ────────────────────────────────── */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}