/* ==========================================================================
   Layout — container, header, footer, buttons, cards (shared components)
   ========================================================================== */

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--section-pad-x);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.9rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--fs-body);
  border: none;
  transition: transform 0.25s var(--ease-breath), box-shadow 0.25s var(--ease-breath);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--gradient-dawn);
  color: var(--color-white);
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  box-shadow: var(--shadow-lift);
}

.btn-secondary {
  background: transparent;
  color: var(--color-ember);
  border: 1.5px solid var(--color-ember-35);
}

.btn-secondary:hover {
  border-color: var(--color-ember);
}

.btn-on-dark {
  background: rgba(250, 246, 240, 0.12);
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.5);
}

.btn-on-dark:hover {
  background: rgba(250, 246, 240, 0.2);
}

.btn-block {
  width: 100%;
}

/* ---------- Site header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 246, 240, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-ember-12);
}

#hero,
#chto-daet,
#chto-vnutri,
#ob-avtore,
#otzyvy {
  scroll-margin-top: 90px;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: 0.9rem;
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--color-ember);
  flex-shrink: 0;
}

.site-header__logo img {
  width: 38px;
  height: 38px;
  border-radius: 50%;
}

.site-nav {
  display: none;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.site-nav__list a {
  font-size: var(--fs-body-sm);
  font-weight: 600;
  color: var(--color-ember-60);
  transition: color 0.2s;
}

.site-nav__list a:hover,
.site-nav__list a[aria-current="page"] {
  color: var(--color-ember);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.site-header__actions .btn {
  padding: 0.7rem 1.35rem;
  font-size: var(--fs-body-sm);
}

@media (max-width: 899px) {
  .site-header__actions .btn-primary {
    display: none;
  }
}

.btn-header-login {
  display: none;
  font-size: var(--fs-body-sm);
  font-weight: 600;
  color: var(--color-ember-60);
  padding: 0.7rem 0.5rem;
  transition: color 0.2s;
}

.btn-header-login:hover {
  color: var(--color-ember);
}

@media (min-width: 900px) {
  .btn-header-login {
    display: inline-block;
  }
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ember);
  position: relative;
  transition: transform 0.25s var(--ease-breath), opacity 0.25s;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
}

.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }

.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle[aria-expanded="true"] span::after { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-nav {
  position: fixed;
  inset: 0;
  top: 65px;
  background: var(--color-mist);
  z-index: 100;
  padding: var(--space-lg) var(--section-pad-x);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--ease-breath), transform 0.25s var(--ease-breath);
}

.mobile-nav.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.mobile-nav a {
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.mobile-nav .btn {
  margin-top: var(--space-sm);
}

@media (min-width: 900px) {
  .site-nav { display: block; }
  .nav-toggle { display: none; }
  .mobile-nav { display: none; }
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--color-ember);
  color: rgba(250, 246, 240, 0.72);
  padding-block: var(--space-xl) var(--space-lg);
}

.site-footer__top {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(250, 246, 240, 0.14);
}

.site-footer__brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-white);
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
}

.site-footer__links a {
  font-size: var(--fs-body-sm);
  transition: color 0.2s;
}

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

.site-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding-top: var(--space-md);
  font-size: var(--fs-caption);
}

@media (min-width: 700px) {
  .site-footer__top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ---------- Section scaffolding ---------- */

.section {
  padding-block: var(--section-pad-y);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-xl);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-head .eyebrow {
  display: block;
  margin-bottom: var(--space-xs);
}

.section-head h2 {
  margin-bottom: var(--space-sm);
}

.section-head p {
  font-size: var(--fs-body-lg);
  color: var(--color-ember-60);
}

/* ---------- Card ---------- */

.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}