/**
 * Main CSS
 * Точка входа: импорт всех стилей в правильном порядке.
 */

@import url("tokens.css");
@import url("reset.css");
@import url("typography.css");
@import url("layout.css");
@import url("components.css");
@import url("animations.css");

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
}

.header__nav {
  display: none;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .header__nav {
    display: flex;
  }
}

.header__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.header__link:hover,
.header__link--active {
  color: var(--color-text-primary);
}

.header__link--active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
}

/* Hamburger */
.header__burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 0;
}

@media (min-width: 768px) {
  .header__burger {
    display: none;
  }
}

.header__burger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.header__burger--open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__burger--open span:nth-child(2) {
  opacity: 0;
}

.header__burger--open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile overlay */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  background-color: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-nav--open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav__link {
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

.mobile-nav__link:hover {
  color: var(--color-text-secondary);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-16);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer__brand {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.footer__heading {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer__link {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-text-primary);
}

.footer__bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* --- Hero --- */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding-block: var(--space-32);
}

.hero__title {
  font-size: clamp(2.5rem, 7vw, var(--text-6xl));
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  max-width: 900px;
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, var(--text-xl));
  color: var(--color-text-secondary);
  max-width: 520px;
  line-height: var(--leading-normal);
  margin-bottom: var(--space-8);
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-16);
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.hero__scroll-arrow {
  font-size: var(--text-xl);
}

/* --- Section headers --- */
.section-header {
  margin-bottom: var(--space-12);
}

.section-header__title {
  font-size: clamp(1.75rem, 4vw, var(--text-4xl));
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.section-header__desc {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 560px;
  line-height: var(--leading-normal);
}

/* --- About strip (home page) --- */
.about-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: start;
}

@media (min-width: 768px) {
  .about-strip {
    grid-template-columns: 1fr 1fr;
  }
}

.about-strip__text {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.about-strip__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

/* --- Case hero (individual case page) --- */
.case-hero {
  padding-top: var(--space-8);
  padding-bottom: var(--space-12);
}

.case-hero__title {
  font-size: clamp(2rem, 5vw, var(--text-5xl));
  font-weight: 600;
  margin-bottom: var(--space-6);
}

.case-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.case-hero__challenge {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 640px;
  line-height: var(--leading-normal);
}

/* --- Contact page --- */
.contact-hero {
  min-height: calc(100svh - 64px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-block: var(--space-32);
}

.contact-hero__title {
  font-size: clamp(2rem, 5vw, var(--text-5xl));
  font-weight: 600;
  margin-bottom: var(--space-6);
}

.contact-hero__desc {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 480px;
  margin-inline: auto;
  line-height: var(--leading-normal);
  margin-bottom: var(--space-8);
}

.contact-hero__email {
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
  transition: color var(--transition-fast);
}

.contact-hero__email:hover {
  color: var(--color-text-primary);
}

/* --- Oferta note (contact page) --- */
.oferta-note {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-4);
  margin-bottom: var(--space-8);
}

.oferta-note a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* --- Oferta page --- */
.oferta h2 {
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  margin-bottom: var(--space-4);
  border-top: 1px solid var(--color-border, #e5e5e5);
}

.oferta h2:first-of-type {
  margin-top: var(--space-8);
  border-top: none;
}

.oferta p,
.oferta ul,
.oferta ol {
  margin-bottom: var(--space-4);
}