/* 全站共享样式：CSS 变量实现亮/暗色主题 */
:root {
  --bg: #eef1f6;
  --bg-grad: radial-gradient(1200px 600px at 80% -10%, #dbe4ff 0%, transparent 60%),
             radial-gradient(900px 500px at -10% 110%, #e0f2fe 0%, transparent 55%);
  --card: #ffffff;
  --card-border: #e5e9f0;
  --text: #1f2937;
  --muted: #6b7280;
  --input-bg: #f9fafb;
  --input-border: #d7dce4;
  --primary: #4f46e5;
  --primary-grad: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  --primary-hover: linear-gradient(135deg, #4f46e5 0%, #4338ca 100%);
  --danger: #dc2626;
  --warn: #d97706;
  --ok-bg: #dcfce7; --ok-text: #15803d;
  --err-bg: #fee2e2; --err-text: #b91c1c;
  --tag-bg: #eef0f4; --tag-text: #4b5563;
  --row-border: #f1f3f7;
  --hover-bg: #f6f7fb;
  --shadow: 0 8px 30px rgba(31, 41, 55, .08);
  --overlay: rgba(15, 23, 42, .55);
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #0b1120;
  --bg-grad: radial-gradient(1200px 600px at 80% -10%, #1e2a4a 0%, transparent 60%),
             radial-gradient(900px 500px at -10% 110%, #0f2a3a 0%, transparent 55%);
  --card: #151d2e;
  --card-border: #253049;
  --text: #e5e9f2;
  --muted: #8b95a9;
  --input-bg: #0f1626;
  --input-border: #2c3a56;
  --primary: #818cf8;
  --primary-grad: linear-gradient(135deg, #818cf8 0%, #6366f1 100%);
  --primary-hover: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  --ok-bg: #123324; --ok-text: #4ade80;
  --err-bg: #3a1414; --err-text: #f87171;
  --tag-bg: #243050; --tag-text: #a5b0c7;
  --row-border: #1f2a42;
  --hover-bg: #1a2438;
  --shadow: 0 8px 30px rgba(0, 0, 0, .45);
  --overlay: rgba(0, 0, 0, .7);
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  background-image: var(--bg-grad);
  background-attachment: fixed;
  transition: background-color .25s, color .25s;
}

/* ---------- 布局 ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 28px;
  transition: background-color .25s, border-color .25s;
}
.page-center { max-width: 560px; margin: 48px auto; padding: 0 16px; }
.page-center.narrow { max-width: 380px; margin-top: 12vh; }
.page-wide { max-width: 1150px; margin: 32px auto; padding: 0 16px; }

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 20px; gap: 12px; flex-wrap: wrap;
}
.topbar h1 { font-size: 22px; margin: 0; letter-spacing: .5px; }
.topbar .links { display: flex; align-items: center; gap: 10px; }
.topbar .links a {
  font-size: 13px; text-decoration: none;
  color: var(--muted); background: var(--card);
  border: 1px solid var(--card-border);
  padding: 6px 14px; border-radius: 999px;
  transition: color .15s, border-color .15s, transform .12s;
}
.topbar .links a:hover {
  color: var(--primary); border-color: var(--primary);
  transform: translateY(-1px);
}

/* ---------- 主题切换按钮 ---------- */
.theme-toggle {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--card-border);
  background: var(--card); color: var(--text);
  cursor: pointer; font-size: 16px; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
  transition: transform .15s, background-color .25s;
}
.theme-toggle:hover { transform: scale(1.1); }

/* ---------- 表单 ---------- */
label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 5px; }
.input, input[type=text], input[type=password], input[type=email], input[type=number], input[type=file] {
  width: 100%; padding: 9px 12px; font-size: 14px; color: var(--text);
  background: var(--input-bg); border: 1px solid var(--input-border);
  border-radius: 10px; outline: none;
  transition: border-color .15s, box-shadow .15s, background-color .25s;
}
.input:focus, input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, .18);
}
input[type=file] { padding: 7px 12px; }

.btn, button {
  padding: 9px 18px; border: 0; border-radius: 10px;
  background: var(--primary-grad); color: #fff;
  font-size: 14px; font-weight: 500; cursor: pointer;
  transition: transform .12s, box-shadow .12s, background .2s;
  box-shadow: 0 2px 8px rgba(79, 70, 229, .25);
}
.btn:hover, button:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn:active, button:active { transform: translateY(0); }
button:disabled { opacity: .45; cursor: not-allowed; transform: none; }
button.block { width: 100%; }
button.sm { padding: 6px 12px; font-size: 12px; border-radius: 8px; }
button.danger { background: var(--danger); box-shadow: 0 2px 8px rgba(220, 38, 38, .25); }
button.warn { background: var(--warn); box-shadow: 0 2px 8px rgba(217, 119, 6, .25); }
button.ghost {
  background: transparent; color: var(--muted);
  border: 1px solid var(--input-border); box-shadow: none;
}
button.ghost:hover { background: var(--hover-bg); color: var(--text); }

fieldset {
  border: 1px solid var(--card-border); border-radius: 12px;
  margin: 0 0 16px; padding: 16px;
}
legend { font-size: 13px; color: var(--muted); padding: 0 8px; }

.inline { display: inline-flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline input { width: auto; }

/* ---------- 提示 ---------- */
.flash {
  padding: 11px 14px; border-radius: 10px; font-size: 13px; margin-bottom: 16px;
  background: var(--ok-bg); color: var(--ok-text);
}
.flash.err { background: var(--err-bg); color: var(--err-text); }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--row-border); text-align: left; vertical-align: middle; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
tbody tr:hover { background: var(--hover-bg); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }

.tag {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  font-size: 11px; background: var(--tag-bg); color: var(--tag-text);
}
.tag.red { background: var(--err-bg); color: var(--err-text); }
.tag.green { background: var(--ok-bg); color: var(--ok-text); }
.tag.blue { background: rgba(99, 102, 241, .15); color: var(--primary); }

details { margin-top: 8px; }
summary {
  cursor: pointer; font-size: 12px; color: var(--primary);
  list-style: none; display: inline-block;
}
summary::before { content: "▸ "; }
details[open] summary::before { content: "▾ "; }

/* ---------- 头像（hover 可编辑） ---------- */
.avatar-wrap {
  position: relative; width: 96px; height: 96px; border-radius: 50%;
  overflow: hidden; cursor: pointer; flex-shrink: 0;
  border: 3px solid var(--card-border);
  transition: border-color .2s, transform .15s;
}
.avatar-wrap:hover { border-color: var(--primary); transform: scale(1.03); }
.avatar-wrap img { width: 100%; height: 100%; object-fit: cover; display: block; }
.avatar-wrap .avatar-empty {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  background: var(--tag-bg); color: var(--muted); font-size: 12px;
}
.avatar-wrap .avatar-hover {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: rgba(0, 0, 0, .45); color: #fff; font-size: 12px; gap: 2px;
  opacity: 0; transition: opacity .18s;
}
.avatar-wrap:hover .avatar-hover { opacity: 1; }
.avatar-hover .icon { font-size: 20px; }

.avatar-wrap.small { width: 40px; height: 40px; border-width: 2px; }
.avatar-wrap.small .avatar-hover { font-size: 10px; }
.avatar-wrap.small .avatar-hover .icon { font-size: 14px; }

/* ---------- 裁剪弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; z-index: 100;
  background: var(--overlay);
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
}
.modal-card {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 16px; padding: 22px; width: 380px; max-width: 100%;
  box-shadow: var(--shadow);
}
.modal-card h3 { margin: 0 0 14px; font-size: 16px; }
.crop-viewport {
  position: relative; width: 300px; height: 300px; margin: 0 auto;
  overflow: hidden; border-radius: 12px; background: #000;
  touch-action: none; cursor: grab;
}
.crop-viewport:active { cursor: grabbing; }
.crop-viewport img {
  position: absolute; left: 0; top: 0; transform-origin: 0 0;
  user-select: none; -webkit-user-drag: none; pointer-events: none;
}
.crop-ring {
  position: absolute; inset: 0; margin: auto;
  width: 260px; height: 260px; border-radius: 50%;
  box-shadow: 0 0 0 999px rgba(0, 0, 0, .45);
  border: 2px dashed rgba(255, 255, 255, .8);
  pointer-events: none;
}
.crop-tip { text-align: center; font-size: 12px; color: var(--muted); margin: 12px 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

/* ---------- 用户中心信息表 ---------- */
.info-table td { padding: 12px 6px; font-size: 14px; }
.info-table td:first-child { color: var(--muted); width: 96px; white-space: nowrap; }
.expired { color: var(--err-text); font-weight: 600; }

h2.section { font-size: 16px; margin: 0 0 16px; }
.panel { margin-bottom: 24px; }