:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --border: #e3e5e9;
  --text: #1f2329;
  --text-dim: #7a8089;
  --primary: #2f6fed;
  --primary-dark: #245ac4;
  --danger: #d64545;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }

/* ---------- 登录页 ---------- */

.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 36px;
  width: 320px;
  text-align: center;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.login-card h1 { margin: 0; font-size: 28px; }
.login-sub { margin: 4px 0 24px; color: var(--text-dim); }

.login-card input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 14px;
}

.login-card button {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
}
.login-card button:hover { background: var(--primary-dark); }
.login-card button:disabled { opacity: 0.6; cursor: default; }

.login-error { color: var(--danger); min-height: 1.2em; margin: 12px 0 0; }

/* ---------- 顶栏 ---------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { font-size: 18px; font-weight: 700; }

#search-input {
  flex: 1;
  max-width: 480px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  outline: none;
}
#search-input:focus { border-color: var(--primary); background: #fff; }

/* ---------- 布局 ---------- */

.layout {
  display: flex;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
  gap: 20px;
  align-items: flex-start;
}

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  position: sticky;
  top: 76px;
}

.folder-list { list-style: none; margin: 0; padding: 0; }

.folder-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
}
.folder-item:hover { background: var(--bg); }
.folder-item.active { background: #e8effd; color: var(--primary); font-weight: 600; }

.folder-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.folder-count { color: var(--text-dim); font-size: 12px; }

.folder-actions { display: none; gap: 2px; }
.folder-item:hover .folder-actions { display: inline-flex; }

.icon-btn {
  border: none;
  background: none;
  padding: 2px 4px;
  border-radius: 4px;
  color: var(--text-dim);
  font-size: 12px;
}
.icon-btn:hover { background: var(--border); color: var(--text); }

.btn-new-folder { width: 100%; margin-top: 8px; }

/* ---------- 内容区 ---------- */

.content { flex: 1; min-width: 0; }

.content-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.content-head h2 { margin: 0; font-size: 18px; }

.link-list { display: flex; flex-direction: column; gap: 10px; }

.link-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
}
.link-card:hover { border-color: #c9d4ea; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04); }

.link-favicon {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border-radius: 4px;
  flex-shrink: 0;
}

.link-main { flex: 1; min-width: 0; }

.link-title {
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  word-break: break-all;
}
.link-title:hover { color: var(--primary); text-decoration: underline; }

.link-url {
  color: var(--text-dim);
  font-size: 12px;
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.link-desc { color: var(--text-dim); margin-top: 4px; font-size: 13px; word-break: break-all; }

.link-clicks { color: var(--text-dim); margin-top: 4px; font-size: 12px; }

.link-folder-badge {
  display: inline-block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 6px;
}

.link-actions { display: flex; gap: 4px; flex-shrink: 0; }

.empty-tip { text-align: center; color: var(--text-dim); margin-top: 60px; }

/* ---------- 按钮 ---------- */

.btn-primary {
  border: none;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  padding: 8px 16px;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { opacity: 0.6; cursor: default; }

.btn-ghost {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  padding: 8px 14px;
}
.btn-ghost:hover { background: var(--bg); }

.btn-danger {
  border: none;
  border-radius: 8px;
  background: var(--danger);
  color: #fff;
  padding: 8px 16px;
}
.btn-danger:hover { filter: brightness(0.92); }

/* ---------- 弹窗 ---------- */

.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}
.modal-mask[hidden] { display: none; }

.modal {
  background: var(--panel);
  border-radius: var(--radius);
  padding: 24px;
  width: 440px;
  max-width: 100%;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.16);
}
.modal h3 { margin: 0 0 16px; }

.modal label { display: block; margin-bottom: 12px; color: var(--text-dim); font-size: 13px; }
.required { color: var(--danger); }

.modal input[type="url"],
.modal input[type="text"],
.modal textarea,
.modal select {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  color: var(--text);
  resize: vertical;
}
.modal input:focus, .modal textarea:focus, .modal select:focus { border-color: var(--primary); }

.radio-row {
  display: flex !important;
  align-items: center;
  gap: 8px;
  color: var(--text) !important;
  font-size: 14px !important;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  background: #333;
  color: #fff;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 13px;
  z-index: 200;
  max-width: 80vw;
}

/* ---------- 移动端 ---------- */

@media (max-width: 768px) {
  .layout { flex-direction: column; padding: 12px; }

  .sidebar {
    width: 100%;
    position: static;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
  }

  .folder-list {
    display: flex;
    flex: 1;
    overflow-x: auto;
    gap: 4px;
  }

  .folder-item { flex-shrink: 0; padding: 6px 12px; }
  .folder-actions { display: none !important; }

  .btn-new-folder { width: auto; margin-top: 0; flex-shrink: 0; white-space: nowrap; }

  .topbar { gap: 8px; padding: 10px 12px; }
  .brand { display: none; }
}