/* ============================================================
   LIST PAGE — 列表页专属（milestones / reports / guides）
   依赖 tokens + base + layout + components
   注：header/footer 用 gs-* 命名（与主页 site-* 不同），P1-E 会统一改名
   ============================================================ */

/* 列表页容器宽度（覆盖 tokens.css 的 1320px） */
:root {
  --max-width: 1100px;
}

/* ============ HEADER（列表页专属 gs-* 版）============ */
.gs-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(12, 20, 139, 0.95);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.gs-nav-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: var(--header-height);
}

.gs-logo {
  font-weight: 700;
  font-size: 26px;
  letter-spacing: 0.5px;
  color: var(--yellow);
  flex-shrink: 0;
}

.gs-header-title {
  flex: 1;
  text-align: center;
  min-width: 0;
}

.gs-header-h1 {
  font-size: 26px;
  font-weight: 700;
  color: var(--yellow);
  line-height: 1.2;
  letter-spacing: -0.3px;
  text-decoration: none;
  transition: color 0.2s;
}

.gs-header-h1:hover {
  color: var(--accent);
}

.gs-header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.gs-search {
  display: inline-flex;
  align-items: center;
  height: var(--header-btn-height);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.2s, background 0.2s;
}

.gs-search:focus-within {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.1);
}

.gs-search-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  padding: 0 12px;
  height: 100%;
  width: 180px;
}

.gs-search-input::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

.gs-search-btn {
  background: transparent;
  border: none;
  border-left: 1px solid var(--border);
  color: var(--muted);
  font-size: 16px;
  padding: 0 12px;
  height: 100%;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  line-height: 1;
}

.gs-search-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent);
}

.gs-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: var(--header-btn-height);
  color: var(--muted);
  font-size: 19px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: background 0.2s, color 0.2s;
}

.gs-back:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.gs-back-arrow {
  display: none;
}

.gs-back-text {
  display: inline;
}

.gs-list-btn {
  display: none;
}

/* ============ MAIN ============ */
.gs-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-7) 24px var(--space-8);
}

.gs-intro {
  text-align: center;
  margin-bottom: var(--space-6);
}

.gs-intro-sub {
  font-size: 42px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

/* ============ LIST ============ */
.gs-list-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.gs-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-6) var(--space-5);
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.gs-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(102, 217, 255, 0.25);
}

.gs-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.gs-card-title-link {
  flex: 1;
  min-width: 0;
  color: var(--text);
}

.gs-card-title-link:hover .gs-card-title {
  color: var(--accent);
}

.gs-card-title {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
}

.gs-card-meta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  font-size: 19px;
}

.gs-card-author {
  color: var(--accent);
  transition: color 0.2s;
}

.gs-card-author:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.gs-sep {
  color: var(--muted);
  opacity: 0.6;
}

.gs-card-date {
  color: var(--muted);
  font-family: "SF Mono", "Consolas", "Monaco", monospace;
  letter-spacing: 0.5px;
}

.gs-card-body {
  display: block;
  color: inherit;
}

.gs-card-summary {
  font-size: 19px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: var(--space-3);
}

.gs-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.gs-tag {
  font-size: 17px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  padding: 4px 14px;
  border-radius: 20px;
}

/* ============ EMPTY ============ */
.gs-empty {
  text-align: center;
  color: var(--muted);
  padding: var(--space-8) 0;
  font-size: 18px;
}

/* ============ FOOTER（列表页 gs-* 版）============ */
.gs-footer {
  text-align: center;
  padding: var(--space-6) 24px;
  color: var(--muted);
  font-size: 22px;
}

.gs-footer .name {
  color: var(--yellow);
  font-weight: 600;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .gs-main {
    padding: var(--space-6) 20px var(--space-7);
  }

  .gs-header-title {
    display: none;
  }

  .gs-search-input {
    width: 140px;
  }
}

@media (max-width: 640px) {
  .gs-main {
    padding: var(--space-5) 16px var(--space-6);
  }

  .gs-card {
    padding: var(--space-5) var(--space-4);
  }

  .gs-intro-sub {
    font-size: 32px;
  }

  .gs-search-input {
    display: none;
  }

  .gs-search {
    border-radius: var(--radius-sm);
  }

  .gs-search-btn {
    border-left: none;
    font-size: 18px;
    padding: 0 12px;
  }

  .gs-back {
    padding: 0 12px;
    font-size: 18px;
  }

  .gs-back-arrow {
    display: inline;
  }

  .gs-back-text {
    display: none;
  }

  .gs-card-meta {
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    font-size: 17px;
  }

  .gs-sep {
    display: none;
  }

  .gs-card-title {
    font-size: 20px;
  }
  
    /* ===== 窄屏搜索弹层 ===== */
    .gs-search-overlay {
      position: absolute;          /* 不是 fixed（iOS Safari 兼容） */
      left: 0;
      right: 0;
      z-index: 1000;
      /* top 由 JS 动态设置 */
      background: var(--color-bg, #0c148b);
      border-bottom: 1px solid rgba(255,255,255,0.15);
      padding: 10px 16px;
      display: none;
      align-items: center;
      gap: 10px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.4);
      opacity: 1;
      transition: opacity 0.2s ease;   /* 淡入用 */
    }
    .gs-search-overlay.open {
      display: flex;
    }
    .gs-search-overlay.is-scrolling {
      opacity: 0;
      pointer-events: none;
      transition: opacity 0s;          /* 淡出立即，滚动时不拖影 */
    }
    /* input / close 按钮样式保持不变 */
    .gs-search-overlay input {
      flex: 1 1 auto;
      min-width: 0;
      font-size: 16px;
      padding: 10px 12px;
      border-radius: var(--radius-sm, 8px);
      border: 1px solid rgba(255,255,255,0.25);
      background: rgba(255,255,255,0.1);
      color: inherit;
      outline: none;
    }
    .gs-search-overlay input::placeholder {
      color: rgba(255,255,255,0.5);
    }
    .gs-search-overlay .gs-search-overlay-close {
      flex: 0 0 auto;
      background: none;
      border: none;
      color: inherit;
      font-size: 24px;
      line-height: 1;
      cursor: pointer;
      padding: 0 4px;
      opacity: 0.7;
    }
    .gs-search-overlay .gs-search-overlay-close:hover {
      opacity: 1;
    }
}