* { margin: 0; padding: 0; box-sizing: border-box; }
/* ===== 主题变量 ===== */
:root[data-theme="dark"] {
  --bg: #0d1117;
  --text: #e6edf3;
  --muted: #8b949e;
  --border: #30363d;
  --card: #161b22;
  --link: #58a6ff;
  --btn-bg: #21262d;
  --btn-hover: #30363d;
}

:root[data-theme="light"] {
  --bg: #ffffff;
  --text: #1f2328;
  --muted: #656d76;
  --border: #d0d7de;
  --card: #f6f8fa;
  --link: #0969da;
  --btn-bg: #f6f8fa;
  --btn-hover: #eaeef2;
}

/* ===== 字体 ===== */
@font-face {
  font-family: '0xProtoPropo';
  src: url('fonts/0xProtoNerdFontPropo-Regular.ttf') format('truetype');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: '0xProtoPropo';
  src: url('fonts/0xProtoNerdFontPropo-Bold.ttf') format('truetype');
  font-weight: 600;
  font-display: swap;
}

body {
  font-family: '0xProtoPropo', -apple-system, BlinkMacSystemFont, "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.2s, color 0.2s;
}

/* ===== 顶部工具栏（固定右上角） ===== */
.toolbar {
  position: fixed;
  top: 16px;
  right: 20px;
  display: flex;
  gap: 8px;
  z-index: 100;
}

.toolbar button {
  font-family: inherit;
  font-size: 0.85rem;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--btn-bg);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.toolbar button:hover {
  background: var(--btn-hover);
  border-color: var(--link);
  color: var(--link);
}

/* ===== 布局 ===== */
.layout {
  display: flex;
  min-height: 100vh;
}

/* 左侧 1/4 */
.sidebar {
  flex: 0 0 25%;
  border-right: 1px solid var(--border);
  padding: 48px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.username {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.userinfo {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 28px;
}

.avatar {
  width: 112px;
  height: 112px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--card);
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

.profile-meta {
  width: 100%;
  max-width: 240px;
  margin-bottom: 20px;
  border-top: 1px solid var(--border);
}

.meta-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 2px;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}

.meta-item span {
  color: var(--muted);
}

.meta-item strong {
  font-weight: 400;
  text-align: right;
}

.interest-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  max-width: 240px;
  margin-bottom: 22px;
}

.links {
  width: 100%;
  max-width: 220px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.links a {
  display: block;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text);
  font-size: 0.9rem;
  text-align: center;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.links a:hover {
  background: var(--card);
  border-color: var(--link);
  color: var(--link);
}

/* 右侧 3/4 */
.main {
  flex: 1;
  padding: 48px 56px;
  overflow-y: auto;
  max-width: 1100px;
}

.main h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.main section {
  margin-bottom: 36px;
}

.main p {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 12px;
}

.main .lead {
  color: var(--muted);
  font-size: 1rem;
}

.main ul {
  list-style: none;
  padding: 0;
}

.main ul li {
  font-size: 0.95rem;
  color: var(--text);
  padding: 4px 0;
}

.main ul li::before {
  content: "·";
  color: var(--muted);
  margin-right: 8px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.card {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
}

.card h3 {
  margin-bottom: 6px;
  font-size: 0.95rem;
  font-weight: 600;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tags span,
.interest-tags span {
  padding: 3px 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--muted);
  font-size: 0.8rem;
}

/* 窄屏：上下堆叠 */
@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 32px 24px;
    position: static;
    height: auto;
  }
  .main {
    padding: 32px 24px;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .toolbar {
    top: 12px;
    right: 12px;
  }
}