/* 导航栏 */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

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

.nav__logo {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text) !important;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav__prompt {
  color: var(--color-terminal);
}

.nav__links {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}

.nav__link {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted) !important;
  position: relative;
  padding: var(--space-xs) 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-terminal);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-terminal) !important;
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* 汉堡菜单按钮 */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--duration-fast) var(--ease-out);
}

/* 主内容区 */
.main {
  padding-top: calc(var(--nav-height) + var(--space-2xl));
  min-height: calc(100vh - var(--nav-height));
}

/* 页脚 */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.footer__text {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.footer__prompt {
  color: var(--color-terminal);
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* 聊天室全屏布局 */
.body--chat {
  overflow: hidden;
}

.main--chat {
  padding-top: 0;
  min-height: auto;
}

/* 移动端响应 */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.98);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .nav__links--open {
    display: flex;
  }
}

/* 移动端微调 */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }

  .neofetch__content {
    flex-direction: column;
  }

  .neofetch__ascii {
    text-align: center;
  }

  .quick-links__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .posts-grid {
    grid-template-columns: 1fr;
  }

  .quick-links__grid {
    grid-template-columns: 1fr;
  }
}