.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  background: rgba(13, 12, 37, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  font-size: 22px;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.3px;
}

.logo-text .logo-sub {
  font-weight: 500;
  color: var(--text-2);
}

.main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 72px 40px 90px;
}

.hero {
  text-align: center;
  margin-bottom: 64px;
}

.hero__title {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
  margin-bottom: 18px;
  line-height: 1.15;
}

.hero__subtitle {
  font-size: 18px;
  color: var(--text-2);
  line-height: 1.65;
}

.tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.5s ease, box-shadow 0.5s ease;
}

.tool-card:hover {
  transform: scale(1.015);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.tool-card__icon {
  font-size: 34px;
  line-height: 1;
}

.tool-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-on-card);
}

.tool-card__desc {
  font-size: 14px;
  color: var(--text-on-card-2);
  line-height: 1.6;
  flex: 1;
}

.tool-card__btn.btn--tool {
  background: var(--gradient-btn);
  background-size: 200%;
  background-position: right;
  color: var(--btn-text);
  border: none;
  transition: filter 0.3s ease;
}

.tool-card__btn.btn--tool:hover {
  filter: brightness(1.1);
}

.btn--login {
  background: var(--gradient-btn);
  background-size: 200%;
  background-position: right;
  color: var(--btn-text);
  border: none;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  transition: filter 0.3s ease;
}

.btn--login:hover {
  filter: brightness(1.1);
}

@media (max-width: 768px) {
  .header { height: 60px; padding: 0 16px; }
  .logo-mark { font-size: 18px; }
  .logo-text { font-size: 14px; }
  .btn--login { padding: 8px 18px; font-size: 14px; }
  .main { padding: 40px 16px 60px; }
  .hero { margin-bottom: 40px; }
  .hero__title { font-size: 30px; line-height: 1.2; letter-spacing: -0.5px; margin-bottom: 14px; }
  .hero__subtitle { font-size: 16px; line-height: 1.5; }
  .tools { grid-template-columns: 1fr; gap: 16px; }
  .tool-card { padding: 24px 20px 22px; gap: 12px; }
  .tool-card__icon { font-size: 30px; }
  .tool-card__title { font-size: 17px; }
  .tool-card__desc { font-size: 14px; line-height: 1.5; }
}

@media (max-width: 480px) {
  .logo-text { font-size: 13px; }
  .hero__title { font-size: 26px; }
  .hero__subtitle { font-size: 15px; }
  .tool-card { padding: 20px 18px; }
}