:root {
    --bg-global: #f1f2f3; --bg-card: #ffffff; --border-color: #e3e5e7;
    --text-main: #18191c; --text-muted: #9499a0; --text-accent: #00aeec;
    --bg-input: #f6f7f8; --btn-primary: #00aeec; --btn-secondary: #f6f7f8;
    --btn-secondary-text: #61666d; --danger-bg: #fff5f5; --danger-border: #feb2b2; --danger-text: #dc2626;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg-global: #111214; --bg-card: #18191c; --border-color: #31353d;
        --text-main: #e3e5e7; --text-muted: #737880; --bg-input: #25272d;
        --btn-secondary: #25272d; --btn-secondary-text: #a6aab2;
        --danger-bg: #2c1515; --danger-border: #672020; --danger-text: #f87171;
    }
}
body { font-family: -apple-system, BlinkMacSystemFont, sans-serif; background-color: var(--bg-global); color: var(--text-main); margin: 0; padding: 0; transition: background-color 0.3s; }
.top-banner { width: 100%; height: 140px; background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%); }
.main-wrapper { max-width: 1100px; margin: -50px auto 40px auto; padding: 0 20px; box-sizing: border-box; }
.msg { padding: 12px 16px; border-radius: 6px; font-size: 14px; margin-bottom: 20px; display: none; }
.status-error { background: var(--danger-bg); color: var(--danger-text); border: 1px solid var(--danger-border); }
.status-success { background: #dcfce7; color: #15803d; border: 1px solid #86efac; }
@media (prefers-color-scheme: dark) { .status-success { background: #14321a; color: #4ade80; border: 1px solid #166534; } }
.bili-layout { display: grid; grid-template-columns: 280px 1fr; gap: 20px; align-items: start; }
.left-space-card { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 24px; text-align: center; }
.avatar-wrap { position: relative; width: 90px; height: 90px; margin: -70px auto 12px auto; }
.avatar-img { width: 90px; height: 90px; border-radius: 50%; object-fit: cover; border: 4px solid var(--bg-card); background-color: var(--bg-input); cursor: pointer; }
.user-name-title { font-size: 18px; font-weight: bold; margin: 4px 0; }
.user-uid-badge { display: inline-block; font-size: 11px; color: var(--text-muted); background-color: var(--bg-input); padding: 2px 8px; border-radius: 4px; margin-bottom: 20px; font-family: monospace; }
.space-nav-list { list-style: none; padding: 0; margin: 0; text-align: left; }
.space-nav-item { padding: 12px 16px; border-radius: 6px; font-size: 14px; cursor: pointer; margin-bottom: 6px; display: flex; align-items: center; color: var(--btn-secondary-text); text-decoration: none; transition: all 0.2s; }
.space-nav-item:hover { background-color: var(--bg-input); color: var(--text-accent); }
.space-nav-item.active { background-color: var(--bg-input); color: var(--text-accent); font-weight: bold; }
.right-content-card { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; padding: 30px; min-height: 280px; box-sizing: border-box; }
.right-content-card h3 { margin: 0 0 24px 0; font-size: 18px; font-weight: 600; border-left: 4px solid var(--btn-primary); padding-left: 10px; }
.form-group { margin-bottom: 18px; max-width: 460px; }
.form-group label { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
input { width: 100%; padding: 11px 14px; border: 1px solid var(--border-color); background-color: var(--bg-input); color: var(--text-main); border-radius: 6px; box-sizing: border-box; font-size: 14px; }
input:focus { border-color: var(--btn-primary); outline: none; }
button { width: 100%; max-width: 200px; padding: 11px 24px; background-color: var(--btn-primary); color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: 500; font-size: 14px; transition: opacity 0.2s; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.secondary { background-color: var(--btn-secondary); color: var(--btn-secondary-text); }
button.danger { background-color: var(--danger-text); color: white; }
.auth-card { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 10px; padding: 40px; max-width: 400px; margin: 8px auto; box-shadow: 0 4px 16px rgba(0,0,0,0.04); }
.auth-card h2 { margin: 0 0 24px 0; text-align: center; font-size: 22px; font-weight: 600; }
.auth-card button { max-width: 100%; width: 100%; }
@media (max-width: 768px) { .bili-layout { grid-template-columns: 1fr; } .avatar-wrap { margin: 10px auto 12px auto; } .main-wrapper { margin-top: 10px; } .top-banner { height: 70px; } }