/* =============================================================
   THE IMPACT ADVANTAGE — MAIN STYLES
   Depends on tokens.css. Organised: reset → base → layout →
   components → sections → footer → responsive.
   ============================================================= */

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

/* ---------- BASE ---------- */
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  color: var(--text-on-dark);
  background: var(--bg-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: var(--fw-extrabold);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
}

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--accent-bright);
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent);
}
.section--light .eyebrow { color: var(--accent-deep); }
.section--light .eyebrow::before { background: var(--accent-deep); }

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

.section { padding-block: var(--section-pad-y); position: relative; }
.section--dark      { background: var(--bg-dark);     color: var(--text-on-dark); }
.section--dark-alt  { background: var(--bg-dark-alt);  color: var(--text-on-dark); }
.section--light     { background: var(--bg-light);     color: var(--text-on-light); }
.section--light-alt { background: var(--bg-light-alt); color: var(--text-on-light); }

.section__head { max-width: 720px; margin-bottom: var(--space-5); }
.section__head h2 { font-size: var(--fs-h2); margin: var(--space-2) 0 var(--space-2); }
.section__head p {
  font-size: var(--fs-lead);
  color: var(--text-on-dark-muted);
  font-weight: var(--fw-regular);
}
.section--light .section__head p,
.section--light-alt .section__head p { color: var(--text-on-light-muted); }

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wide);
  padding: 1rem 1.85rem;
  border-radius: var(--radius-pill);
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-soft),
              color var(--dur-fast) var(--ease-soft),
              border-color var(--dur-fast) var(--ease-soft);
}
.btn svg { width: 16px; height: 16px; transition: transform var(--dur-fast) var(--ease-out); }
.btn:hover { transform: translateY(-2px); }
.btn:hover svg { transform: translateX(3px); }

.btn--primary { background: var(--accent); color: var(--green-900); }
.btn--primary:hover { background: var(--accent-bright); }

.btn--ghost {
  background: transparent;
  color: var(--text-on-dark);
  border: 1px solid var(--hairline-dark);
}
.btn--ghost:hover { border-color: var(--accent-bright); color: var(--accent-bright); }
.section--light .btn--ghost { color: var(--text-on-light); border-color: var(--hairline-light); }
.section--light .btn--ghost:hover { border-color: var(--accent-deep); color: var(--accent-deep); }

/* ---------- NAV ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.75rem var(--container-pad);
  transition: background var(--dur-base) var(--ease-soft),
              backdrop-filter var(--dur-base) var(--ease-soft),
              padding var(--dur-base) var(--ease-soft);
}
.nav__logo { margin-right: auto; }
.nav.is-scrolled {
  background: rgba(7, 27, 22, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--hairline-dark);
}
.nav__logo img {
  height: 192px;
  width: auto;
  transition: height var(--dur-base) var(--ease-soft);
}
.nav.is-scrolled .nav__logo img { height: 64px; }

/* Language switcher — editorial, no boxes */
.nav__lang {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.nav__lang-btn {
  appearance: none;
  background: transparent;
  border: 0;
  padding: 0.3rem 0.2rem;
  margin: 0;
  font: inherit;
  font-family: var(--font-display, "Montserrat", system-ui, sans-serif);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-soft);
}
.nav__lang-btn:hover { color: var(--text-on-dark); }
.nav__lang-btn.is-active { color: var(--accent-bright); }
.nav__lang-btn:focus-visible {
  outline: 1px solid var(--accent-bright);
  outline-offset: 4px;
  border-radius: 2px;
}
.nav__lang-sep {
  color: var(--text-on-dark-muted);
  opacity: 0.45;
  font-size: 0.78rem;
  user-select: none;
}
.nav__links { display: flex; align-items: center; gap: 2.4rem; }
.nav__links a {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--text-on-dark-muted);
  letter-spacing: 0.02em;
  transition: color var(--dur-fast) var(--ease-soft);
  position: relative;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 1px;
  background: var(--accent-bright);
  transition: width var(--dur-fast) var(--ease-out);
}
.nav__links a:hover { color: var(--text-on-dark); }
.nav__links a:hover::after { width: 100%; }
.nav__cta { padding: 0.7rem 1.3rem; }
.nav__toggle { display: none; width: 26px; height: 18px; position: relative; }
.nav__toggle span {
  position: absolute; left: 0; width: 100%; height: 2px;
  background: var(--text-on-dark); transition: all var(--dur-fast) var(--ease-soft);
}
.nav__toggle span:nth-child(1) { top: 0; }
.nav__toggle span:nth-child(2) { top: 8px; }
.nav__toggle span:nth-child(3) { top: 16px; }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url("../img/leaf-dark.png");
  background-size: cover;
  background-position: right center;
  opacity: 0.5;
  z-index: 0;
}
.hero__bg::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(100deg,
    var(--green-900) 18%,
    rgba(7, 27, 22, 0.86) 46%,
    rgba(7, 27, 22, 0.35) 78%);
}
.hero__inner { position: relative; z-index: 1; max-width: 880px; }
.hero h1 {
  font-size: var(--fs-h1);
  margin: var(--space-3) 0 var(--space-3);
  text-transform: uppercase;
}
.hero h1 .accent { color: var(--accent-bright); display: block; }
.hero__lead {
  font-size: var(--fs-lead);
  color: var(--text-on-dark-muted);
  max-width: 560px;
  margin-bottom: var(--space-5);
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: var(--container-pad);
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
}
.hero__scroll i {
  width: 1px; height: 46px; background: var(--accent);
  display: block; transform-origin: top;
  animation: scrollPulse 2.4s var(--ease-soft) infinite;
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(0.35); opacity: 0.4; }
  50%      { transform: scaleY(1);    opacity: 1; }
}

/* ---------- STATEMENT (Core Philosophy) ---------- */
.statement { text-align: left; }
.statement__quote {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: var(--fs-h3);
  line-height: var(--lh-snug);
  max-width: 38ch;
}
.statement__quote .muted { color: var(--text-on-light-muted); }
.statement__quote .accent { color: var(--accent-deep); }
.statement__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-6);
  align-items: center;
}
.statement__body p { font-size: var(--fs-lead); margin-bottom: var(--space-3); }
.statement__body p:last-child { margin-bottom: 0; }

/* ---------- WORKSHOP CARDS ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.card {
  background: var(--surface-dark);
  border: 1px solid var(--hairline-dark);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: transform var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-soft),
              background var(--dur-base) var(--ease-soft);
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  background: var(--green-600);
}
.card__icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border: 1px solid var(--hairline-dark);
  border-radius: var(--radius-sm);
  color: var(--accent-bright);
  margin-bottom: var(--space-2);
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { font-size: var(--fs-h3); font-weight: var(--fw-bold); }
.card p { color: var(--text-on-dark-muted); font-size: var(--fs-small); }
.card__tag {
  margin-top: auto;
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--accent-bright);
}

/* ---------- INSIGHTS (editorial) ---------- */
.insights { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.insight {
  border-top: 1px solid var(--hairline-light);
  padding-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: opacity var(--dur-fast) var(--ease-soft);
}
.insight:hover { opacity: 0.72; }
.insight__meta {
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--accent-deep);
}
.insight h3 {
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  color: var(--text-on-light);
}
.insight p { font-size: var(--fs-small); color: var(--text-on-light-muted); }
.insight__more {
  margin-top: auto;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--accent-deep);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* ---------- ABOUT / CTA ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: center;
}
.about__copy h2 { font-size: var(--fs-h2); margin-bottom: var(--space-3); }
.about__copy p { color: var(--text-on-dark-muted); margin-bottom: var(--space-3); font-size: var(--fs-lead); }
.about__list { display: grid; gap: 0.9rem; margin: var(--space-3) 0 var(--space-4); }
.about__list li {
  display: flex; gap: 0.85rem; align-items: flex-start;
  font-size: var(--fs-small); color: var(--text-on-dark);
}
.about__list svg { width: 18px; height: 18px; color: var(--accent-bright); flex-shrink: 0; margin-top: 2px; }
.about__visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--hairline-dark);
  aspect-ratio: 4 / 3;
}
.about__visual img { width: 100%; height: 100%; object-fit: cover; }

.finalcta { text-align: center; }
.finalcta__inner { max-width: 720px; margin-inline: auto; }
.finalcta h2 {
  font-size: var(--fs-h1);
  text-transform: uppercase;
  margin: var(--space-3) 0 var(--space-3);
}
.finalcta h2 .accent { color: var(--accent-bright); }
.finalcta p { color: var(--text-on-dark-muted); font-size: var(--fs-lead); margin-bottom: var(--space-5); }
.finalcta .hero__actions { justify-content: center; }

/* ---------- FOOTER ---------- */
.footer { background: var(--green-900); padding-block: var(--space-6) var(--space-4); }
.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-5);
  flex-wrap: wrap;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--hairline-dark);
}
.footer__brand img { height: 76px; margin-bottom: var(--space-2); }
.footer__brand p { color: var(--text-on-dark-muted); font-size: var(--fs-small); max-width: 280px; }
.footer__cols { display: flex; gap: var(--space-6); flex-wrap: wrap; }
.footer__col h4 {
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: var(--space-2);
}
.footer__col a {
  display: block;
  font-size: var(--fs-small);
  color: var(--text-on-dark-muted);
  margin-bottom: 0.6rem;
  transition: color var(--dur-fast) var(--ease-soft);
}
.footer__col a:hover { color: var(--text-on-dark); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: var(--space-3);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.06em;
  color: var(--text-on-dark-muted);
  text-transform: uppercase;
}

/* ---------- SCROLL REVEAL ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}
[data-reveal].is-visible { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: 0.12s; }
[data-reveal-delay="2"] { transition-delay: 0.24s; }
[data-reveal-delay="3"] { transition-delay: 0.36s; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 920px) {
  .statement__grid,
  .about__grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .cards { grid-template-columns: 1fr 1fr; }
  .insights { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav__logo img { height: 96px; }
  .nav.is-scrolled .nav__logo img { height: 52px; }
  .nav__links {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(78vw, 320px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1.8rem;
    padding: var(--container-pad);
    background: var(--green-800);
    border-left: 1px solid var(--hairline-dark);
    transform: translateX(100%);
    transition: transform var(--dur-base) var(--ease-out);
  }
  .nav__links.is-open { transform: none; }
  .nav__toggle { display: block; z-index: 101; }
  .nav.is-menu-open .nav__toggle span:nth-child(1) { top: 8px; transform: rotate(45deg); }
  .nav.is-menu-open .nav__toggle span:nth-child(2) { opacity: 0; }
  .nav.is-menu-open .nav__toggle span:nth-child(3) { top: 8px; transform: rotate(-45deg); }
  .cards,
  .insights { grid-template-columns: 1fr; }
  .hero__scroll { display: none; }
  .footer__top { flex-direction: column; }
}