/* ============================================================
   书签库 · 简约设计系统 v3（深色默认 + 浅色切换）
   克制：单一主色、纯色背景、细边框、轻阴影
   ============================================================ */
:root,
[data-theme="dark"] {
  --primary: #6366f1;
  --primary-strong: #818cf8;
  --primary-soft: rgba(99, 102, 241, .12);
  --primary-border: rgba(99, 102, 241, .35);

  --bg: #0f1117;
  --bg-soft: #141720;
  --text: #e7e9f2;
  --text-2: #9aa1b5;
  --text-3: #5f6678;
  --line: #23262f;
  --line-2: #31353f;
  --card: #161922;
  --card-2: #1a1e29;
  --nav-bg: #12141c;

  --danger: #f2555f;
  --danger-soft: rgba(242, 85, 95, .12);
  --success: #41c97b;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,.28);
  --shadow-lg: 0 20px 50px rgba(0,0,0,.4);

  color-scheme: dark;
}

[data-theme="light"] {
  --primary: #4f46e5;
  --primary-strong: #4338ca;
  --primary-soft: rgba(79, 70, 229, .08);
  --primary-border: rgba(79, 70, 229, .3);

  --bg: #f6f7f9;
  --bg-soft: #eef0f4;
  --text: #1b1e28;
  --text-2: #5c6472;
  --text-3: #98a0b0;
  --line: #e4e6ec;
  --line-2: #d2d6df;
  --card: #ffffff;
  --card-2: #fafbfd;
  --nav-bg: rgba(255, 255, 255, .92);

  --danger: #dc4446;
  --danger-soft: #fdecec;
  --success: #1f9d63;

  --shadow-sm: 0 1px 3px rgba(30, 35, 70, .06);
  --shadow-md: 0 8px 24px rgba(30, 35, 70, .08);
  --shadow-lg: 0 20px 50px rgba(30, 35, 70, .12);

  color-scheme: light;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  transition: background .3s ease, color .3s ease;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .92em; background: var(--primary-soft); padding: 2px 7px; border-radius: 6px; color: var(--primary-strong); }
::selection { background: var(--primary-soft); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  height: 40px; padding: 0 18px;
  border-radius: 10px;
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .12s ease, box-shadow .18s ease;
  white-space: nowrap; user-select: none;
}
.btn:active { transform: scale(.98); }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-strong); box-shadow: 0 6px 16px rgba(30, 30, 80, .2); }
.btn-primary:active { box-shadow: none; }

.btn-ghost { background: transparent; color: var(--text-2); border-color: var(--line); }
.btn-ghost:hover { color: var(--text); border-color: var(--line-2); background: var(--primary-soft); }

.btn-danger-ghost { background: transparent; color: var(--danger); border-color: var(--line); }
.btn-danger-ghost:hover { background: var(--danger-soft); border-color: var(--danger); }

.btn-sm { height: 34px; padding: 0 14px; font-size: 13px; border-radius: 9px; }

.btn-icon {
  width: 34px; height: 34px; padding: 0; border-radius: 9px;
  border: none;
  display: inline-flex; align-items: center; justify-content: center;
  background: transparent; color: var(--text-2); font-size: 14px;
  cursor: pointer;
  transition: background .16s ease, color .16s ease, transform .12s ease;
  flex-shrink: 0;
}
.btn-icon svg { width: 15px; height: 15px; display: block; }
.btn-icon:hover { background: var(--primary-soft); color: var(--primary); }
.btn-icon.danger:hover { background: var(--danger-soft); color: var(--danger); }

.theme-toggle { width: 36px; height: 36px; padding: 0; border-radius: 10px; border: 1px solid var(--line); background: transparent; color: var(--text-2); font-size: 15px; cursor: pointer; transition: all .2s; }
.theme-toggle:hover { color: var(--text); border-color: var(--line-2); }

/* 移动端汉堡按钮 */
.hamburger { display: none; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--line); background: transparent; color: var(--text-2); font-size: 18px; cursor: pointer; align-items: center; justify-content: center; }

/* ============ 卡片 ============ */
.glass, .card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
}

/* ============ 表单 ============ */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--text-2); margin-bottom: 7px; }
.field .hint { font-size: 12px; color: var(--text-3); margin-top: 6px; }

.input, select.input, textarea.input {
  width: 100%; height: 46px; padding: 0 14px;
  border: 1px solid var(--line-2); border-radius: 10px;
  font-size: 15px; font-family: inherit; color: var(--text);
  background: var(--card-2);
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease;
  appearance: none;
  -webkit-appearance: none;
}
select.input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239aa1b5' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; padding-right: 38px; cursor: pointer;
}
.input::placeholder { color: var(--text-3); }
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); background: var(--card); }

/* ============ 提示 ============ */
.alert { border-radius: 10px; padding: 12px 15px; font-size: 13.5px; margin-bottom: 18px; border: 1px solid; display: flex; gap: 8px; align-items: flex-start; }
.alert.error { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.alert.success { background: rgba(31, 157, 99, .12); color: var(--success); border-color: transparent; }
.alert.warn { background: rgba(245, 158, 11, .12); color: #d97706; border-color: transparent; }
[data-theme="dark"] .alert.warn { color: #fbbf24; }

/* ============ 徽章 ============ */
.badge { display: inline-flex; align-items: center; gap: 5px; font-size: 11.5px; font-weight: 600;
  color: var(--primary); background: var(--primary-soft); border: 1px solid var(--primary-border);
  border-radius: 999px; padding: 3px 10px; }

/* ============ 动效 ============ */
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeUp .4s ease both; }

/* 抽屉遮罩 */
.drawer-mask { display: none; position: fixed; inset: 0; z-index: 55; background: rgba(0,0,0,.5); opacity: 0; transition: opacity .25s ease; }
.drawer-mask.show { display: block; opacity: 1; }

/* ============ 滚动条 ============ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--text-3); border-radius: 99px; }
::-webkit-scrollbar-track { background: transparent; }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }