.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  background: transparent;
  transition: background 400ms var(--ease-smooth), box-shadow 400ms var(--ease-smooth), backdrop-filter 400ms var(--ease-smooth);
}

.site-header.is-scrolled {
  background: rgba(250, 250, 248, 0.72);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 20px rgba(26, 26, 26, 0.04);
}

.brand {
  width: min(1080px, calc(100vw - 48px));
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0.01em;
}

.brand-between {
  justify-content: space-between;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-links {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
}

.header-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

.header-links a:hover {
  color: var(--text-primary);
}

.hero {
  min-height: calc(100vh - 64px);
  padding-top: 104px;
  display: grid;
  align-content: start;
  row-gap: 16px;
  text-align: center;
}

.hero-title {
  font-family: var(--font-en);
  font-size: clamp(32px, 4vw, 40px);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.hero-subtitle {
  margin-top: 0;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.upload-wrap {
  margin: 20px auto 0;
  max-width: 1040px;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.95fr);
  gap: 18px;
  align-items: start;
}

.file-section {
  max-width: 1040px;
  margin: 28px auto var(--space-xxl);
}

.admin-hero {
  min-height: auto;
}

.admin-wrap {
  margin: 20px auto var(--space-xxl);
  max-width: 1040px;
  display: grid;
  gap: 18px;
}

.file-section-title {
  font-size: 24px;
  font-weight: 400;
  margin-bottom: 24px;
}

.site-footer {
  height: 120px;
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-size: 14px;
  display: grid;
  place-items: center;
}

@media (max-width: 1024px) {
  .upload-wrap {
    width: 100%;
    max-width: none;
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .brand {
    width: min(1080px, calc(100vw - 32px));
    font-size: 14px;
  }

  .hero {
    min-height: auto;
    padding-top: 92px;
  }

  .hero-title {
    font-size: 34px;
  }

  .file-section {
    margin-bottom: var(--space-xl);
  }
}