/* ===== Container & Section ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.section {
  padding-block: var(--space-9);
}
.section--alt { background: var(--color-bg-soft); }
.section--dark { background: var(--color-bg-dark); color: #fff; }
.section__head {
  text-align: center;
  margin-bottom: var(--space-7);
}
.section__eyebrow {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: var(--space-4);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
}
.section__title {
  font-size: clamp(28px, 4vw, 44px);
  margin-bottom: var(--space-4);
}
.section__desc {
  color: var(--color-text-sub);
  font-size: 17px;
  max-width: 640px;
  margin-inline: auto;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-line);
}
.btn--ghost:hover { background: var(--color-bg-soft); border-color: var(--color-text); }
.btn--accent {
  background: var(--color-accent);
  color: #fff;
}
.btn--accent:hover { filter: brightness(0.93); transform: translateY(-1px); }
.btn--lg { padding: 16px 32px; font-size: 16px; }
.btn--block { width: 100%; }

/* ===== Card ===== */
.card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--duration-base) var(--ease-out);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: transparent; }

/* ===== Grid ===== */
.grid { display: grid; gap: var(--space-5); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1024px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

/* ===== Header ===== */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.header.is-scrolled {
  background: rgb(255 255 255 / 90%);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom-color: var(--color-line);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.header__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.03em;
  color: var(--color-text);
}
.header__logo svg { width: 28px; height: 28px; }
.header__nav { display: flex; gap: var(--space-6); }
.header__nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-sub);
  transition: color var(--duration-fast);
}
.header__nav a:hover, .header__nav a.is-active { color: var(--color-primary); }
.header__cta { display: flex; gap: 12px; align-items: center; }
.header__cta .btn { padding: 10px 18px; font-size: 14px; }
.header__login {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-sub);
}
.header__login:hover { color: var(--color-text); }

.header__burger {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
}
.header__burger span {
  position: absolute;
  left: 8px;
  right: 8px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--duration-fast) var(--ease-out), opacity var(--duration-fast);
}
.header__burger span:nth-child(1) { top: 14px; }
.header__burger span:nth-child(2) { top: 19px; }
.header__burger span:nth-child(3) { top: 24px; }
.header__burger.is-open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.header__burger.is-open span:nth-child(2) { opacity: 0; }
.header__burger.is-open span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

@media (max-width: 1024px) {
  .header__nav, .header__cta .header__login { display: none; }
  .header__burger { display: block; }
  .header__cta .btn--primary { display: none; }
  .mobile-menu {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: #fff;
    transform: translateY(-100%);
    transition: transform var(--duration-base) var(--ease-out);
    padding: var(--space-6) var(--space-5);
    border-bottom: 1px solid var(--color-line);
    z-index: 99;
    box-shadow: var(--shadow-md);
  }
  .mobile-menu.is-open { transform: translateY(0); }
  .mobile-menu nav { display: flex; flex-direction: column; gap: var(--space-4); margin-bottom: var(--space-5); }
  .mobile-menu nav a { font-size: 18px; font-weight: 600; padding: 8px 0; }
  .mobile-menu .btn { width: 100%; }
  .mobile-menu__cta { display: flex; flex-direction: column; gap: 10px; }
}
@media (min-width: 1025px) {
  .mobile-menu { display: none; }
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-dark);
  color: rgb(255 255 255 / 80%);
  padding-block: var(--space-8) var(--space-6);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-7);
}
.footer__brand p {
  margin-top: var(--space-4);
  font-size: 14px;
  color: rgb(255 255 255 / 60%);
  line-height: 1.7;
}
.footer__col h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: #fff;
}
.footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__col a {
  font-size: 14px;
  color: rgb(255 255 255 / 60%);
  transition: color var(--duration-fast);
}
.footer__col a:hover { color: #fff; }
.footer__legal {
  border-top: 1px solid rgb(255 255 255 / 10%);
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: 13px;
  color: rgb(255 255 255 / 50%);
}
.footer__legal-info { display: flex; flex-wrap: wrap; gap: 16px; }
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .footer__grid { grid-template-columns: 1fr; }
}

/* ===== Reveal animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal--delay-1 { transition-delay: 80ms; }
.reveal--delay-2 { transition-delay: 160ms; }
.reveal--delay-3 { transition-delay: 240ms; }

/* ===== Page header (sub-pages hero) ===== */
.page-hero {
  padding-top: calc(var(--header-h) + var(--space-8));
  padding-bottom: var(--space-8);
  background: linear-gradient(180deg, var(--color-primary-soft) 0%, transparent 100%);
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  margin-bottom: var(--space-4);
}
.page-hero p {
  font-size: 18px;
  color: var(--color-text-sub);
  max-width: 640px;
  margin-inline: auto;
}