* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: #f4f5f7;
    color: #1f2430;
}
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #1f2430;
    color: #fff;
    padding: 16px 28px;
}
.topbar h1 { font-size: 18px; margin: 0; }
.topbar span { margin-right: 14px; opacity: .8; font-size: 14px; }

.container { max-width: 960px; margin: 28px auto; padding: 0 20px; }

.card {
    background: #fff;
    border-radius: 10px;
    padding: 22px 26px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,.08);
}
.card h2 { margin-top: 0; font-size: 17px; }

.form-grid { display: grid; gap: 14px; max-width: 480px; }
.form-grid label { display: flex; flex-direction: column; font-size: 13px; font-weight: 600; gap: 6px; color: #444; }
.form-grid input {
    font-size: 14px;
    padding: 9px 11px;
    border: 1px solid #d7d9e0;
    border-radius: 6px;
}
.form-actions { display: flex; gap: 10px; margin-top: 4px; }

.btn {
    display: inline-block;
    padding: 9px 16px;
    border-radius: 6px;
    border: none;
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}
.btn-primary { background: #2f6fed; color: #fff; }
.btn-primary:hover { background: #2559c9; }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.4); }
.btn-small { padding: 6px 11px; font-size: 12px; background: #eef0f5; color: #1f2430; }
.btn-small:hover { background: #e2e5ee; }
.btn-danger { background: #fdeaea; color: #b3261e; }
.btn-danger:hover { background: #fbd9d9; }

.link-grid { display: grid; gap: 16px; }
.link-item {
    display: flex;
    gap: 16px;
    border: 1px solid #eceef2;
    border-radius: 8px;
    padding: 14px;
    align-items: center;
}
.qr-img { width: 84px; height: 84px; border: 1px solid #eee; border-radius: 6px; }
.link-details { flex: 1; min-width: 0; }
.url-row { font-size: 12px; color: #666; margin-top: 3px; word-break: break-all; }
.url-row a { color: #2f6fed; text-decoration: none; }
.btn-row { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.btn-row form { margin: 0; }

.hint { color: #777; font-size: 13px; }
.flash { padding: 10px 14px; border-radius: 6px; font-size: 14px; }
.flash.success { background: #e7f6ec; color: #1c7a3f; }
.flash.error { background: #fdeaea; color: #b3261e; }

.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.auth-box { background: #fff; padding: 32px; border-radius: 10px; box-shadow: 0 2px 8px rgba(0,0,0,.1); width: 320px; }
.auth-box h1 { font-size: 18px; margin-top: 0; }
.auth-box form { display: grid; gap: 14px; margin-top: 16px; }
.auth-box label { display: flex; flex-direction: column; font-size: 13px; font-weight: 600; gap: 6px; }
.auth-box input { font-size: 14px; padding: 9px 11px; border: 1px solid #d7d9e0; border-radius: 6px; }
.auth-box .error { color: #b3261e; font-size: 13px; }
.auth-box .success { color: #1c7a3f; font-size: 13px; }