/* 右上角登录按钮 */
.login-btn {
    position: fixed;
    top: 20px;
    right: 24px;
    z-index: 1000;
    padding: 8px 18px;
    font-size: 14px;
    color: #fff;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 20px;
    cursor: pointer;
    backdrop-filter: blur(6px);
    transition: background 0.3s;
}
.login-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 模态框遮罩 */
.login-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(1px);
    justify-content: center;
    align-items: flex-start;
    padding-top: 12vh;
}
.login-modal.active {
    display: flex;
}

/* 半屏登录面板 */
.login-panel {
    width: 90%;
    max-width: 420px;
    background: #fff;
    border-radius: 16px;
    padding: 32px 28px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideDown 0.3s ease;
}
@keyframes slideDown {
    from { transform: translateY(-30px); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}
.login-panel h2 {
    margin: 0 0 6px;
    font-size: 20px;
    color: #222;
}
.login-panel .subtitle {
    font-size: 13px;
    color: #999;
    margin-bottom: 20px;
}
.login-panel input {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    margin-bottom: 14px;
    font-size: 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    outline: none;
    transition: border 0.2s;
}
.login-panel input:focus {
    border-color: #ff5050;
}
.login-panel .btn-primary {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    color: #fff;
    background: #ff5050;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: opacity 0.2s;
}
.login-panel .btn-primary:hover {
    opacity: 0.85;
}
.login-panel .msg {
    font-size: 13px;
    margin-bottom: 12px;
    min-height: 18px;
}
.login-panel .msg.error { color: #e74c3c; }
.login-panel .msg.success { color: #27ae60; }
.login-panel .close-row {
    text-align: right;
    margin-bottom: 10px;
}
.login-panel .close-row span {
    cursor: pointer;
    color: #bbb;
    font-size: 20px;
    line-height: 1;
}
.login-panel .close-row span:hover {
    color: #666;
}

/* 默认隐藏的菜单项（登录后显示） */
/* 导航容器：自动换行 + 居中 */
.navigation {
    display: flex !important;
    flex-wrap: wrap !important;
    justify-content: center !important;
    align-items: center !important;
    gap: 16px !important;
    padding: 0 !important;
    margin: 20px auto !important;
    list-style: none !important;
    max-width: 500px;
}

/* 每个菜单项 */
.nav-item {
    display: inline-block !important;
    margin: 0 !important;
    padding: 0 !important;
    width: auto !important;
    flex: 0 0 auto !important;
}

/* 白底圆角按钮样式：从原来的 .nav-col .nav-link 迁移过来 */
.nav-item .nav-link {
    display: inline-block !important;
    padding: 12px 32px !important;
    color: #fff !important;
    background: rgba(255, 255, 255, 0.15) !important;
    border: 1px solid rgba(255, 255, 255, 0.25) !important;
    border-radius: 30px !important;
    text-decoration: none !important;
    text-align: center !important;
    min-width: 100px !important;
    backdrop-filter: blur(6px);
    transition: background 0.3s;
}

.nav-item .nav-link:hover {
    background: rgba(255, 255, 255, 0.3) !important;
}

/* 私密菜单默认隐藏 */
.nav-item.auth-only {
    display: none !important;
}

/* 登录后显示 */
body.logged-in .nav-item.auth-only {
    display: inline-block !important;
}